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Changes in 4.4.76
ipv6: release dst on error in ip6_dst_lookup_tail
net: don't call strlen on non-terminated string in dev_set_alias()
decnet: dn_rtmsg: Improve input length sanitization in dnrmg_receive_user_skb
net: Zero ifla_vf_info in rtnl_fill_vfinfo()
af_unix: Add sockaddr length checks before accessing sa_family in bind and connect handlers
Fix an intermittent pr_emerg warning about lo becoming free.
net: caif: Fix a sleep-in-atomic bug in cfpkt_create_pfx
igmp: acquire pmc lock for ip_mc_clear_src()
igmp: add a missing spin_lock_init()
ipv6: fix calling in6_ifa_hold incorrectly for dad work
net/mlx5: Wait for FW readiness before initializing command interface
decnet: always not take dst->__refcnt when inserting dst into hash table
net: 8021q: Fix one possible panic caused by BUG_ON in free_netdev
sfc: provide dummy definitions of vswitch functions
ipv6: Do not leak throw route references
rtnetlink: add IFLA_GROUP to ifla_policy
netfilter: xt_TCPMSS: add more sanity tests on tcph->doff
netfilter: synproxy: fix conntrackd interaction
NFSv4: fix a reference leak caused WARNING messages
drm/ast: Handle configuration without P2A bridge
mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
MIPS: Avoid accidental raw backtrace
MIPS: pm-cps: Drop manual cache-line alignment of ready_count
MIPS: Fix IRQ tracing & lockdep when rescheduling
ALSA: hda - Fix endless loop of codec configure
ALSA: hda - set input_path bitmap to zero after moving it to new place
drm/vmwgfx: Free hash table allocated by cmdbuf managed res mgr
usb: gadget: f_fs: Fix possibe deadlock
sysctl: enable strict writes
block: fix module reference leak on put_disk() call for cgroups throttle
mm: numa: avoid waiting on freed migrated pages
KVM: x86: fix fixing of hypercalls
scsi: sd: Fix wrong DPOFUA disable in sd_read_cache_type
scsi: lpfc: Set elsiocb contexts to NULL after freeing it
qla2xxx: Fix erroneous invalid handle message
ARM: dts: BCM5301X: Correct GIC_PPI interrupt flags
net: mvneta: Fix for_each_present_cpu usage
MIPS: ath79: fix regression in PCI window initialization
net: korina: Fix NAPI versus resources freeing
MIPS: ralink: MT7688 pinmux fixes
MIPS: ralink: fix USB frequency scaling
MIPS: ralink: Fix invalid assignment of SoC type
MIPS: ralink: fix MT7628 pinmux typos
MIPS: ralink: fix MT7628 wled_an pinmux gpio
mtd: bcm47xxpart: limit scanned flash area on BCM47XX (MIPS) only
bgmac: fix a missing check for build_skb
mtd: bcm47xxpart: don't fail because of bit-flips
bgmac: Fix reversed test of build_skb() return value.
net: bgmac: Fix SOF bit checking
net: bgmac: Start transmit queue in bgmac_open
net: bgmac: Remove superflous netif_carrier_on()
powerpc/eeh: Enable IO path on permanent error
gianfar: Do not reuse pages from emergency reserve
Btrfs: fix truncate down when no_holes feature is enabled
virtio_console: fix a crash in config_work_handler
swiotlb-xen: update dev_addr after swapping pages
xen-netfront: Fix Rx stall during network stress and OOM
scsi: virtio_scsi: Reject commands when virtqueue is broken
platform/x86: ideapad-laptop: handle ACPI event 1
amd-xgbe: Check xgbe_init() return code
net: dsa: Check return value of phy_connect_direct()
drm/amdgpu: check ring being ready before using
vfio/spapr: fail tce_iommu_attach_group() when iommu_data is null
virtio_net: fix PAGE_SIZE > 64k
vxlan: do not age static remote mac entries
ibmveth: Add a proper check for the availability of the checksum features
kernel/panic.c: add missing \n
HID: i2c-hid: Add sleep between POWER ON and RESET
scsi: lpfc: avoid double free of resource identifiers
spi: davinci: use dma_mapping_error()
mac80211: initialize SMPS field in HT capabilities
x86/mpx: Use compatible types in comparison to fix sparse error
coredump: Ensure proper size of sparse core files
swiotlb: ensure that page-sized mappings are page-aligned
s390/ctl_reg: make __ctl_load a full memory barrier
be2net: fix status check in be_cmd_pmac_add()
perf probe: Fix to show correct locations for events on modules
net/mlx4_core: Eliminate warning messages for SRQ_LIMIT under SRIOV
sctp: check af before verify address in sctp_addr_id2transport
ravb: Fix use-after-free on `ifconfig eth0 down`
jump label: fix passing kbuild_cflags when checking for asm goto support
xfrm: fix stack access out of bounds with CONFIG_XFRM_SUB_POLICY
xfrm: NULL dereference on allocation failure
xfrm: Oops on error in pfkey_msg2xfrm_state()
watchdog: bcm281xx: Fix use of uninitialized spinlock.
sched/loadavg: Avoid loadavg spikes caused by delayed NO_HZ accounting
ARM64/ACPI: Fix BAD_MADT_GICC_ENTRY() macro implementation
ARM: 8685/1: ensure memblock-limit is pmd-aligned
x86/mpx: Correctly report do_mpx_bt_fault() failures to user-space
x86/mm: Fix flush_tlb_page() on Xen
ocfs2: o2hb: revert hb threshold to keep compatible
iommu/vt-d: Don't over-free page table directories
iommu: Handle default domain attach failure
iommu/amd: Fix incorrect error handling in amd_iommu_bind_pasid()
cpufreq: s3c2416: double free on driver init error path
KVM: x86: fix emulation of RSM and IRET instructions
KVM: x86/vPMU: fix undefined shift in intel_pmu_refresh()
KVM: x86: zero base3 of unusable segments
KVM: nVMX: Fix exception injection
Linux 4.4.76
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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[ Upstream commit 4d22c75d4c7b5c5f4bd31054f09103ee490878fd ]
If the last section of a core file ends with an unmapped or zero page,
the size of the file does not correspond with the last dump_skip() call.
gdb complains that the file is truncated and can be confusing to users.
After all of the vma sections are written, make sure that the file size
is no smaller than the current file position.
This problem can be demonstrated with gdb's bigcore testcase on the
sparc architecture.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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list_lru_count_node() iterates over all memcgs to get the total number of
entries on the node but it can race with memcg_drain_all_list_lrus(),
which migrates the entries from a dead cgroup to another. This can return
incorrect number of entries from list_lru_count_node().
Fix this by keeping track of entries per node and simply return it in
list_lru_count_node().
Change-Id: I19e3b527804e95be75f48ee363c8207c0e7ee2ff
Link: http://lkml.kernel.org/r/1498707555-30525-1-git-send-email-stummala@codeaurora.org
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Alexander Polakov <apolyakov@beget.ru>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Patch-mainline: linux-mm @ 29/06/17, 09:09:15
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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* refs/heads/tmp-8c91412:
Linux 4.4.75
nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too
nvme/quirk: Add a delay before checking for adapter readiness
net: phy: fix marvell phy status reading
net: phy: Initialize mdio clock at probe function
usb: gadget: f_fs: avoid out of bounds access on comp_desc
powerpc/slb: Force a full SLB flush when we insert for a bad EA
mtd: spi-nor: fix spansion quad enable
of: Add check to of_scan_flat_dt() before accessing initial_boot_params
rxrpc: Fix several cases where a padded len isn't checked in ticket decode
USB: usbip: fix nonconforming hub descriptor
drm/amdgpu: adjust default display clock
drm/amdgpu/atom: fix ps allocation size for EnableDispPowerGating
drm/radeon: add a quirk for Toshiba Satellite L20-183
drm/radeon: add a PX quirk for another K53TK variant
iscsi-target: Reject immediate data underflow larger than SCSI transfer length
target: Fix kref->refcount underflow in transport_cmd_finish_abort
time: Fix clock->read(clock) race around clocksource changes
Input: i8042 - add Fujitsu Lifebook AH544 to notimeout list
powerpc/kprobes: Pause function_graph tracing during jprobes handling
signal: Only reschedule timers on signals timers have sent
HID: Add quirk for Dell PIXART OEM mouse
CIFS: Improve readdir verbosity
KVM: PPC: Book3S HV: Preserve userspace HTM state properly
lib/cmdline.c: fix get_options() overflow while parsing ranges
autofs: sanity check status reported with AUTOFS_DEV_IOCTL_FAIL
fs/exec.c: account for argv/envp pointers
UPSTREAM: drivers/perf: arm-pmu: fix RCU usage on pmu resume from low-power
UPSTREAM: drivers/perf: arm_pmu: implement CPU_PM notifier
ANDROID: squashfs: Fix endianness issue
ANDROID: squashfs: Fix signed division issue
Change-Id: Iabe0921dd7b9a582f5237235338ef0f730de7edb
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
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Changes in 4.4.75
fs/exec.c: account for argv/envp pointers
autofs: sanity check status reported with AUTOFS_DEV_IOCTL_FAIL
lib/cmdline.c: fix get_options() overflow while parsing ranges
KVM: PPC: Book3S HV: Preserve userspace HTM state properly
CIFS: Improve readdir verbosity
HID: Add quirk for Dell PIXART OEM mouse
signal: Only reschedule timers on signals timers have sent
powerpc/kprobes: Pause function_graph tracing during jprobes handling
Input: i8042 - add Fujitsu Lifebook AH544 to notimeout list
time: Fix clock->read(clock) race around clocksource changes
target: Fix kref->refcount underflow in transport_cmd_finish_abort
iscsi-target: Reject immediate data underflow larger than SCSI transfer length
drm/radeon: add a PX quirk for another K53TK variant
drm/radeon: add a quirk for Toshiba Satellite L20-183
drm/amdgpu/atom: fix ps allocation size for EnableDispPowerGating
drm/amdgpu: adjust default display clock
USB: usbip: fix nonconforming hub descriptor
rxrpc: Fix several cases where a padded len isn't checked in ticket decode
of: Add check to of_scan_flat_dt() before accessing initial_boot_params
mtd: spi-nor: fix spansion quad enable
powerpc/slb: Force a full SLB flush when we insert for a bad EA
usb: gadget: f_fs: avoid out of bounds access on comp_desc
net: phy: Initialize mdio clock at probe function
net: phy: fix marvell phy status reading
nvme/quirk: Add a delay before checking for adapter readiness
nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too
Linux 4.4.75
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit ceea5e3771ed2378668455fa21861bead7504df5 upstream.
In tests, which excercise switching of clocksources, a NULL
pointer dereference can be observed on AMR64 platforms in the
clocksource read() function:
u64 clocksource_mmio_readl_down(struct clocksource *c)
{
return ~(u64)readl_relaxed(to_mmio_clksrc(c)->reg) & c->mask;
}
This is called from the core timekeeping code via:
cycle_now = tkr->read(tkr->clock);
tkr->read is the cached tkr->clock->read() function pointer.
When the clocksource is changed then tkr->clock and tkr->read
are updated sequentially. The code above results in a sequential
load operation of tkr->read and tkr->clock as well.
If the store to tkr->clock hits between the loads of tkr->read
and tkr->clock, then the old read() function is called with the
new clock pointer. As a consequence the read() function
dereferences a different data structure and the resulting 'reg'
pointer can point anywhere including NULL.
This problem was introduced when the timekeeping code was
switched over to use struct tk_read_base. Before that, it was
theoretically possible as well when the compiler decided to
reload clock in the code sequence:
now = tk->clock->read(tk->clock);
Add a helper function which avoids the issue by reading
tk_read_base->clock once into a local variable clk and then issue
the read function via clk->read(clk). This guarantees that the
read() function always gets the proper clocksource pointer handed
in.
Since there is now no use for the tkr.read pointer, this patch
also removes it, and to address stopping the fast timekeeper
during suspend/resume, it introduces a dummy clocksource to use
rather then just a dummy read function.
Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Cc: Daniel Mentz <danielmentz@google.com>
Link: http://lkml.kernel.org/r/1496965462-20003-2-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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(cherry picked from commit da4e4f18afe0f3729d68f3785c5802f786d36e34)
When a CPU is suspended (either through suspend-to-RAM or CPUidle),
its PMU registers content can be lost, which means that counters
registers values that were initialized on power down entry have to be
reprogrammed on power-up to make sure the counters set-up is preserved
(ie on power-up registers take the reset values on Cold or Warm reset,
which can be architecturally UNKNOWN).
To guarantee seamless profiling conditions across a core power down
this patch adds a CPU PM notifier to ARM pmus, that upon CPU PM
entry/exit from low-power states saves/restores the pmu registers
set-up (by using the ARM perf API), so that the power-down/up cycle does
not affect the perf behaviour (apart from a black-out period between
power-up/down CPU PM notifications that is unavoidable).
Change-Id: Ifbd73b82ca9dc172c58e2488cda1af9af975b14f
Cc: Will Deacon <will.deacon@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Acked-by: Ashwin Chaugule <ashwin.chaugule@linaro.org>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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Currently, we store each page's allocation stacktrace on corresponding
page_ext structure and it requires a lot of memory. This causes the
problem that memory tight system doesn't work well if page_owner is
enabled. Moreover, even with this large memory consumption, we cannot
get full stacktrace because we allocate memory at boot time and just
maintain 8 stacktrace slots to balance memory consumption. We could
increase it to more but it would make system unusable or change system
behaviour.
To solve the problem, this patch uses stackdepot to store stacktrace.
It obviously provides memory saving but there is a drawback that
stackdepot could fail.
stackdepot allocates memory at runtime so it could fail if system has
not enough memory. But, most of allocation stack are generated at very
early time and there are much memory at this time. So, failure would
not happen easily. And, one failure means that we miss just one page's
allocation stacktrace so it would not be a big problem. In this patch,
when memory allocation failure happens, we store special stracktrace
handle to the page that is failed to save stacktrace. With it, user can
guess memory usage properly even if failure happens.
Memory saving looks as following. (4GB memory system with page_owner)
(before the patch -> after the patch)
static allocation:
92274688 bytes -> 25165824 bytes
dynamic allocation after boot + kernel build:
0 bytes -> 327680 bytes
total:
92274688 bytes -> 25493504 bytes
72% reduction in total.
Note that implementation looks complex than someone would imagine
because there is recursion issue. stackdepot uses page allocator and
page_owner is called at page allocation. Using stackdepot in page_owner
could re-call page allcator and then page_owner. That is a recursion.
To detect and avoid it, whenever we obtain stacktrace, recursion is
checked and page_owner is set to dummy information if found. Dummy
information means that this page is allocated for page_owner feature
itself (such as stackdepot) and it's understandable behavior for user.
Change-Id: I9f96f1b527836a7577b1818a6a4fde7786e23a3b
[iamjoonsoo.kim@lge.com: mm-page_owner-use-stackdepot-to-store-stacktrace-v3]
Link: http://lkml.kernel.org/r/1464230275-25791-6-git-send-email-iamjoonsoo.kim@lge.com
Link: http://lkml.kernel.org/r/1466150259-27727-7-git-send-email-iamjoonsoo.kim@lge.com
Link: http://lkml.kernel.org/r/1464230275-25791-6-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: f2ca0b55710752588ccff5224a11e6aea43a996a
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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Per the discussion with Joonsoo Kim [1], we need check the return value
of lookup_page_ext() for all call sites since it might return NULL in
some cases, although it is unlikely, i.e. memory hotplug.
Tested with ltp with "page_owner=0".
[1] http://lkml.kernel.org/r/20160519002809.GA10245@js1304-P5Q-DELUXE
Change-Id: Ie0c577c1136a7f6f4e0fa2ceacfb007cd5323b8e
[akpm@linux-foundation.org: fix build-breaking typos]
[arnd@arndb.de: fix build problems from lookup_page_ext]
Link: http://lkml.kernel.org/r/6285269.2CksypHdYp@wuerfel
[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/1464023768-31025-1-git-send-email-yang.shi@linaro.org
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: f86e4271978bd93db466d6a95dad4b0fdcdb04f6
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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split_page() calls set_page_owner() to set up page_owner to each pages.
But, it has a drawback that head page and the others have different
stacktrace because callsite of set_page_owner() is slightly differnt.
To avoid this problem, this patch copies head page's page_owner to the
others. It needs to introduce new function, split_page_owner() but it
also remove the other function, get_page_owner_gfp() so looks good to
do.
Change-Id: Ie946ccf7dc1e9eeacb03ac81720c178daa7db21e
Link: http://lkml.kernel.org/r/1464230275-25791-4-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: a9627bc5e34e79ae80a33241b8a1501cc498e191
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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Implement the stack depot and provide CONFIG_STACKDEPOT. Stack depot
will allow KASAN store allocation/deallocation stack traces for memory
chunks. The stack traces are stored in a hash table and referenced by
handles which reside in the kasan_alloc_meta and kasan_free_meta
structures in the allocated memory chunks.
IRQ stack traces are cut below the IRQ entry point to avoid unnecessary
duplication.
Right now stackdepot support is only enabled in SLAB allocator. Once
KASAN features in SLAB are on par with those in SLUB we can switch SLUB
to stackdepot as well, thus removing the dependency on SLUB stack
bookkeeping, which wastes a lot of memory.
This patch is based on the "mm: kasan: stack depots" patch originally
prepared by Dmitry Chernenkov.
Joonsoo has said that he plans to reuse the stackdepot code for the
mm/page_owner.c debugging facility.
Change-Id: I5c92d30b394de78d68443eb4dbf0cb45537049ce
[akpm@linux-foundation.org: s/depot_stack_handle/depot_stack_handle_t]
[aryabinin@virtuozzo.com: comment style fixes]
Signed-off-by: Alexander Potapenko <glider@google.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrey Konovalov <adech.fo@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Konstantin Serebryany <kcc@google.com>
Cc: Dmitry Chernenkov <dmitryc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[guptap@codeaurora.org: keep only stackdepot changes removed kasan
stackdepot enablement changes, as not required.
Reduce STACK_HASH_ORDER to 18, this is to limit kernel static size]
Git-commit: cd11016e5f5212c13c0cec7384a525edc93b4921
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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We don't need to split freepages with holding the zone lock. It will
cause more contention on zone lock so not desirable.
Change-Id: Ifb1ee4e48e322abb25a9293885f68dfe75afb743
[rientjes@google.com: if __isolate_free_page() fails, avoid adding to freelist so we don't call map_pages() with it]
Link: http://lkml.kernel.org/r/alpine.DEB.2.10.1606211447001.43430@chino.kir.corp.google.com
Link: http://lkml.kernel.org/r/1464230275-25791-1-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 66c64223ad4e7a4a9161fcd9606426d9f57227ca
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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The page_owner mechanism is useful for dealing with memory leaks. By
reading /sys/kernel/debug/page_owner one can determine the stack traces
leading to allocations of all pages, and find e.g. a buggy driver.
This information might be also potentially useful for debugging, such as
the VM_BUG_ON_PAGE() calls to dump_page(). So let's print the stored
info from dump_page().
Example output:
page:ffffea000292f1c0 count:1 mapcount:0 mapping:ffff8800b2f6cc18 index:0x91d
flags: 0x1fffff8001002c(referenced|uptodate|lru|mappedtodisk)
page dumped because: VM_BUG_ON_PAGE(1)
page->mem_cgroup:ffff8801392c5000
page allocated via order 0, migratetype Movable, gfp_mask 0x24213ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD|__GFP_NOWARN|__GFP_NORETRY)
[<ffffffff811682c4>] __alloc_pages_nodemask+0x134/0x230
[<ffffffff811b40c8>] alloc_pages_current+0x88/0x120
[<ffffffff8115e386>] __page_cache_alloc+0xe6/0x120
[<ffffffff8116ba6c>] __do_page_cache_readahead+0xdc/0x240
[<ffffffff8116bd05>] ondemand_readahead+0x135/0x260
[<ffffffff8116be9c>] page_cache_async_readahead+0x6c/0x70
[<ffffffff811604c2>] generic_file_read_iter+0x3f2/0x760
[<ffffffff811e0dc7>] __vfs_read+0xa7/0xd0
page has been migrated, last migrate reason: compaction
Change-Id: Ie5f3716ab34b3a66a00973f5d87360ebd0155348
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 4e462112e98f9ad6dd62e160f8b14c7df5fed2fc
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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During migration, page_owner info is now copied with the rest of the
page, so the stacktrace leading to free page allocation during migration
is overwritten. For debugging purposes, it might be however useful to
know that the page has been migrated since its initial allocation. This
might happen many times during the lifetime for different reasons and
fully tracking this, especially with stacktraces would incur extra
memory costs. As a compromise, store and print the migrate_reason of
the last migration that occurred to the page. This is enough to
distinguish compaction, numa balancing etc.
Example page_owner entry after the patch:
Page allocated via order 0, mask 0x24200ca(GFP_HIGHUSER_MOVABLE)
PFN 628753 type Movable Block 1228 type Movable Flags 0x1fffff80040030(dirty|lru|swapbacked)
[<ffffffff811682c4>] __alloc_pages_nodemask+0x134/0x230
[<ffffffff811b6325>] alloc_pages_vma+0xb5/0x250
[<ffffffff81177491>] shmem_alloc_page+0x61/0x90
[<ffffffff8117a438>] shmem_getpage_gfp+0x678/0x960
[<ffffffff8117c2b9>] shmem_fallocate+0x329/0x440
[<ffffffff811de600>] vfs_fallocate+0x140/0x230
[<ffffffff811df434>] SyS_fallocate+0x44/0x70
[<ffffffff8158cc2e>] entry_SYSCALL_64_fastpath+0x12/0x71
Page has been migrated, last migrate reason: compaction
Change-Id: I9c93f9f91fa71feaea1505d80ee56caf8daf5562
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 7cd12b4abfd2f8f42414c520bbd051a5b7dc7a8c
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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The page_owner mechanism stores gfp_flags of an allocation and stack
trace that lead to it. During page migration, the original information
is practically replaced by the allocation of free page as the migration
target. Arguably this is less useful and might lead to all the
page_owner info for migratable pages gradually converge towards
compaction or numa balancing migrations. It has also lead to
inaccuracies such as one fixed by commit e2cfc91120fa ("mm/page_owner:
set correct gfp_mask on page_owner").
This patch thus introduces copying the page_owner info during migration.
However, since the fact that the page has been migrated from its
original place might be useful for debugging, the next patch will
introduce a way to track that information as well.
Change-Id: I4eb94be5fb2c93bbf165edb9f2a80091b5c8d7b1
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: d435edca928805074dae005ab9a42d9fa60fc702
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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CONFIG_PAGE_OWNER attempts to impose negligible runtime overhead when
enabled during compilation, but not actually enabled during runtime by
boot param page_owner=on. This overhead can be further reduced using
the static key mechanism, which this patch does.
Change-Id: I76e44d92ed973647d4fd6489f97db5ffeb893354
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 7dd80b8af0bcd705a9ef2fa272c082882616a499
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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The information in /sys/kernel/debug/page_owner includes the migratetype
of the pageblock the page belongs to. This is also checked against the
page's migratetype (as declared by gfp_flags during its allocation), and
the page is reported as Fallback if its migratetype differs from the
pageblock's one. t This is somewhat misleading because in fact fallback
allocation is not the only reason why these two can differ. It also
doesn't direcly provide the page's migratetype, although it's possible
to derive that from the gfp_flags.
It's arguably better to print both page and pageblock's migratetype and
leave the interpretation to the consumer than to suggest fallback
allocation as the only possible reason. While at it, we can print the
migratetypes as string the same way as /proc/pagetypeinfo does, as some
of the numeric values depend on kernel configuration. For that, this
patch moves the migratetype_names array from #ifdef CONFIG_PROC_FS part
of mm/vmstat.c to mm/page_alloc.c and exports it.
With the new format strings for flags, we can now also provide symbolic
page and gfp flags in the /sys/kernel/debug/page_owner file. This
replaces the positional printing of page flags as single letters, which
might have looked nicer, but was limited to a subset of flags, and
required the user to remember the letters.
Example page_owner entry after the patch:
Page allocated via order 0, mask 0x24213ca(GFP_HIGHUSER_MOVABLE|__GFP_COLD|__GFP_NOWARN|__GFP_NORETRY)
PFN 520 type Movable Block 1 type Movable Flags 0xfffff8001006c(referenced|uptodate|lru|active|mappedtodisk)
[<ffffffff811682c4>] __alloc_pages_nodemask+0x134/0x230
[<ffffffff811b4058>] alloc_pages_current+0x88/0x120
[<ffffffff8115e386>] __page_cache_alloc+0xe6/0x120
[<ffffffff8116ba6c>] __do_page_cache_readahead+0xdc/0x240
[<ffffffff8116bd05>] ondemand_readahead+0x135/0x260
[<ffffffff8116bfb1>] page_cache_sync_readahead+0x31/0x50
[<ffffffff81160523>] generic_file_read_iter+0x453/0x760
[<ffffffff811e0d57>] __vfs_read+0xa7/0xd0
Change-Id: I08f3412dbda9075d5534eee81444843a7679e54e
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 60f30350fd69a3e4d5f0f45937d3274c22565134
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[guptap@codeaurora.org: resolve trivial merge conflicts]
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
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We are going to use sleeping lock for freeing vmap. However some
vfree() users want to free memory from atomic (but not from interrupt)
context. For this we add vfree_atomic() - deferred variation of vfree()
which can be used in any atomic context (except NMIs).
[akpm@linux-foundation.org: tweak comment grammar]
[aryabinin@virtuozzo.com: use raw_cpu_ptr() instead of this_cpu_ptr()]
Link: http://lkml.kernel.org/r/1481553981-3856-1-git-send-email-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/1479474236-4139-5-git-send-email-hch@lst.de
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Joel Fernandes <joelaf@google.com>
Cc: Jisheng Zhang <jszhang@marvell.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: John Dias <joaodias@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: bf22e37a641327e34681b7b6959d9646e3886770
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Change-Id: I5f67e939774da6e811f3a5180a6b0f5d31fbe32b
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
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When mixing lots of vmallocs and set_memory_*() (which calls
vm_unmap_aliases()) I encountered situations where the performance
degraded severely due to the walking of the entire vmap_area list each
invocation.
One simple improvement is to add the lazily freed vmap_area to a
separate lockless free list, such that we then avoid having to walk the
full list on each purge.
Change-Id: I489700962fc86d539a68b5af489dfa9da04dfaad
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Roman Pen <r.peniaev@gmail.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Roman Pen <r.peniaev@gmail.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Git-commit: 80c4bd7a5e4368b680e0aeb57050a1b06eb573d8
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>
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* refs/heads/tmp-77ddb50:
UPSTREAM: usb: gadget: f_fs: avoid out of bounds access on comp_desc
Linux 4.4.74
mm: fix new crash in unmapped_area_topdown()
Allow stack to grow up to address space limit
mm: larger stack guard gap, between vmas
alarmtimer: Rate limit periodic intervals
MIPS: Fix bnezc/jialc return address calculation
usb: dwc3: exynos fix axius clock error path to do cleanup
alarmtimer: Prevent overflow of relative timers
genirq: Release resources in __setup_irq() error path
swap: cond_resched in swap_cgroup_prepare()
mm/memory-failure.c: use compound_head() flags for huge pages
USB: gadgetfs, dummy-hcd, net2280: fix locking for callbacks
usb: xhci: ASMedia ASM1042A chipset need shorts TX quirk
drivers/misc/c2port/c2port-duramar2150.c: checking for NULL instead of IS_ERR()
usb: r8a66597-hcd: decrease timeout
usb: r8a66597-hcd: select a different endpoint on timeout
USB: gadget: dummy_hcd: fix hub-descriptor removable fields
pvrusb2: reduce stack usage pvr2_eeprom_analyze()
usb: core: fix potential memory leak in error path during hcd creation
USB: hub: fix SS max number of ports
iio: proximity: as3935: recalibrate RCO after resume
staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data()
mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode
x86/mm/32: Set the '__vmalloc_start_set' flag in initmem_init()
serial: efm32: Fix parity management in 'efm32_uart_console_get_options()'
mac80211: fix IBSS presp allocation size
mac80211: fix CSA in IBSS mode
mac80211/wpa: use constant time memory comparison for MACs
mac80211: don't look at the PM bit of BAR frames
vb2: Fix an off by one error in 'vb2_plane_vaddr'
cpufreq: conservative: Allow down_threshold to take values from 1 to 10
can: gs_usb: fix memory leak in gs_cmd_reset()
configfs: Fix race between create_link and configfs_rmdir
UPSTREAM: bpf: don't let ldimm64 leak map addresses on unprivileged
BACKPORT: ext4: fix data exposure after a crash
ANDROID: sdcardfs: remove dead function open_flags_to_access_mode()
ANDROID: android-base.cfg: split out arm64-specific configs
Linux 4.4.73
sparc64: make string buffers large enough
s390/kvm: do not rely on the ILC on kvm host protection fauls
xtensa: don't use linux IRQ #0
tipc: ignore requests when the connection state is not CONNECTED
proc: add a schedule point in proc_pid_readdir()
romfs: use different way to generate fsid for BLOCK or MTD
sctp: sctp_addr_id2transport should verify the addr before looking up assoc
r8152: avoid start_xmit to schedule napi when napi is disabled
r8152: fix rtl8152_post_reset function
r8152: re-schedule napi for tx
nfs: Fix "Don't increment lock sequence ID after NFS4ERR_MOVED"
ravb: unmap descriptors when freeing rings
drm/ast: Fixed system hanged if disable P2A
drm/nouveau: Don't enabling polling twice on runtime resume
parisc, parport_gsc: Fixes for printk continuation lines
net: adaptec: starfire: add checks for dma mapping errors
pinctrl: berlin-bg4ct: fix the value for "sd1a" of pin SCRD0_CRD_PRES
gianfar: synchronize DMA API usage by free_skb_rx_queue w/ gfar_new_page
net/mlx4_core: Avoid command timeouts during VF driver device shutdown
drm/nouveau/fence/g84-: protect against concurrent access to semaphore buffers
drm/nouveau: prevent userspace from deleting client object
ipv6: fix flow labels when the traffic class is non-0
FS-Cache: Initialise stores_lock in netfs cookie
fscache: Clear outstanding writes when disabling a cookie
fscache: Fix dead object requeue
ethtool: do not vzalloc(0) on registers dump
log2: make order_base_2() behave correctly on const input value zero
kasan: respect /proc/sys/kernel/traceoff_on_warning
jump label: pass kbuild_cflags when checking for asm goto support
PM / runtime: Avoid false-positive warnings from might_sleep_if()
ipv6: Fix IPv6 packet loss in scenarios involving roaming + snooping switches
i2c: piix4: Fix request_region size
sierra_net: Add support for IPv6 and Dual-Stack Link Sense Indications
sierra_net: Skip validating irrelevant fields for IDLE LSIs
net: hns: Fix the device being used for dma mapping during TX
NET: mkiss: Fix panic
NET: Fix /proc/net/arp for AX.25
ipv6: Inhibit IPv4-mapped src address on the wire.
ipv6: Handle IPv4-mapped src to in6addr_any dst.
net: xilinx_emaclite: fix receive buffer overflow
net: xilinx_emaclite: fix freezes due to unordered I/O
Call echo service immediately after socket reconnect
staging: rtl8192e: rtl92e_fill_tx_desc fix write to mapped out memory.
ARM: dts: imx6dl: Fix the VDD_ARM_CAP voltage for 396MHz operation
partitions/msdos: FreeBSD UFS2 file systems are not recognized
s390/vmem: fix identity mapping
usb: gadget: f_fs: Fix possibe deadlock
Conflicts:
drivers/usb/gadget/function/f_fs.c
Change-Id: I23106e9fc2c4f2d0b06acce59b781f6c36487fcc
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
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Changes in 4.4.74
configfs: Fix race between create_link and configfs_rmdir
can: gs_usb: fix memory leak in gs_cmd_reset()
cpufreq: conservative: Allow down_threshold to take values from 1 to 10
vb2: Fix an off by one error in 'vb2_plane_vaddr'
mac80211: don't look at the PM bit of BAR frames
mac80211/wpa: use constant time memory comparison for MACs
mac80211: fix CSA in IBSS mode
mac80211: fix IBSS presp allocation size
serial: efm32: Fix parity management in 'efm32_uart_console_get_options()'
x86/mm/32: Set the '__vmalloc_start_set' flag in initmem_init()
mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode
staging: rtl8188eu: prevent an underflow in rtw_check_beacon_data()
iio: proximity: as3935: recalibrate RCO after resume
USB: hub: fix SS max number of ports
usb: core: fix potential memory leak in error path during hcd creation
pvrusb2: reduce stack usage pvr2_eeprom_analyze()
USB: gadget: dummy_hcd: fix hub-descriptor removable fields
usb: r8a66597-hcd: select a different endpoint on timeout
usb: r8a66597-hcd: decrease timeout
drivers/misc/c2port/c2port-duramar2150.c: checking for NULL instead of IS_ERR()
usb: xhci: ASMedia ASM1042A chipset need shorts TX quirk
USB: gadgetfs, dummy-hcd, net2280: fix locking for callbacks
mm/memory-failure.c: use compound_head() flags for huge pages
swap: cond_resched in swap_cgroup_prepare()
genirq: Release resources in __setup_irq() error path
alarmtimer: Prevent overflow of relative timers
usb: dwc3: exynos fix axius clock error path to do cleanup
MIPS: Fix bnezc/jialc return address calculation
alarmtimer: Rate limit periodic intervals
mm: larger stack guard gap, between vmas
Allow stack to grow up to address space limit
mm: fix new crash in unmapped_area_topdown()
Linux 4.4.74
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 1be7107fbe18eed3e319a6c3e83c78254b693acb upstream.
Stack guard page is a useful feature to reduce a risk of stack smashing
into a different mapping. We have been using a single page gap which
is sufficient to prevent having stack adjacent to a different mapping.
But this seems to be insufficient in the light of the stack usage in
userspace. E.g. glibc uses as large as 64kB alloca() in many commonly
used functions. Others use constructs liks gid_t buffer[NGROUPS_MAX]
which is 256kB or stack strings with MAX_ARG_STRLEN.
This will become especially dangerous for suid binaries and the default
no limit for the stack size limit because those applications can be
tricked to consume a large portion of the stack and a single glibc call
could jump over the guard page. These attacks are not theoretical,
unfortunatelly.
Make those attacks less probable by increasing the stack guard gap
to 1MB (on systems with 4k pages; but make it depend on the page size
because systems with larger base pages might cap stack allocations in
the PAGE_SIZE units) which should cover larger alloca() and VLA stack
allocations. It is obviously not a full fix because the problem is
somehow inherent, but it should reduce attack space a lot.
One could argue that the gap size should be configurable from userspace,
but that can be done later when somebody finds that the new 1MB is wrong
for some special case applications. For now, add a kernel command line
option (stack_guard_gap) to specify the stack gap size (in page units).
Implementation wise, first delete all the old code for stack guard page:
because although we could get away with accounting one extra page in a
stack vma, accounting a larger gap can break userspace - case in point,
a program run with "ulimit -S -v 20000" failed when the 1MB gap was
counted for RLIMIT_AS; similar problems could come with RLIMIT_MLOCK
and strict non-overcommit mode.
Instead of keeping gap inside the stack vma, maintain the stack guard
gap as a gap between vmas: using vm_start_gap() in place of vm_start
(or vm_end_gap() in place of vm_end if VM_GROWSUP) in just those few
places which need to respect the gap - mainly arch_get_unmapped_area(),
and and the vma tree's subtree_gap support for that.
Original-patch-by: Oleg Nesterov <oleg@redhat.com>
Original-patch-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[wt: backport to 4.11: adjust context]
[wt: backport to 4.9: adjust context ; kernel doc was not in admin-guide]
[wt: backport to 4.4: adjust context ; drop ppc hugetlb_radix changes]
Signed-off-by: Willy Tarreau <w@1wt.eu>
[gkh: minor build fixes for 4.4]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Changes in 4.4.73
s390/vmem: fix identity mapping
partitions/msdos: FreeBSD UFS2 file systems are not recognized
ARM: dts: imx6dl: Fix the VDD_ARM_CAP voltage for 396MHz operation
staging: rtl8192e: rtl92e_fill_tx_desc fix write to mapped out memory.
Call echo service immediately after socket reconnect
net: xilinx_emaclite: fix freezes due to unordered I/O
net: xilinx_emaclite: fix receive buffer overflow
ipv6: Handle IPv4-mapped src to in6addr_any dst.
ipv6: Inhibit IPv4-mapped src address on the wire.
NET: Fix /proc/net/arp for AX.25
NET: mkiss: Fix panic
net: hns: Fix the device being used for dma mapping during TX
sierra_net: Skip validating irrelevant fields for IDLE LSIs
sierra_net: Add support for IPv6 and Dual-Stack Link Sense Indications
i2c: piix4: Fix request_region size
ipv6: Fix IPv6 packet loss in scenarios involving roaming + snooping switches
PM / runtime: Avoid false-positive warnings from might_sleep_if()
jump label: pass kbuild_cflags when checking for asm goto support
kasan: respect /proc/sys/kernel/traceoff_on_warning
log2: make order_base_2() behave correctly on const input value zero
ethtool: do not vzalloc(0) on registers dump
fscache: Fix dead object requeue
fscache: Clear outstanding writes when disabling a cookie
FS-Cache: Initialise stores_lock in netfs cookie
ipv6: fix flow labels when the traffic class is non-0
drm/nouveau: prevent userspace from deleting client object
drm/nouveau/fence/g84-: protect against concurrent access to semaphore buffers
net/mlx4_core: Avoid command timeouts during VF driver device shutdown
gianfar: synchronize DMA API usage by free_skb_rx_queue w/ gfar_new_page
pinctrl: berlin-bg4ct: fix the value for "sd1a" of pin SCRD0_CRD_PRES
net: adaptec: starfire: add checks for dma mapping errors
parisc, parport_gsc: Fixes for printk continuation lines
drm/nouveau: Don't enabling polling twice on runtime resume
drm/ast: Fixed system hanged if disable P2A
ravb: unmap descriptors when freeing rings
nfs: Fix "Don't increment lock sequence ID after NFS4ERR_MOVED"
r8152: re-schedule napi for tx
r8152: fix rtl8152_post_reset function
r8152: avoid start_xmit to schedule napi when napi is disabled
sctp: sctp_addr_id2transport should verify the addr before looking up assoc
romfs: use different way to generate fsid for BLOCK or MTD
proc: add a schedule point in proc_pid_readdir()
tipc: ignore requests when the connection state is not CONNECTED
xtensa: don't use linux IRQ #0
s390/kvm: do not rely on the ILC on kvm host protection fauls
sparc64: make string buffers large enough
Linux 4.4.73
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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[ Upstream commit e26bfebdfc0d212d366de9990a096665d5c0209a ]
Under some circumstances, an fscache object can become queued such that it
fscache_object_work_func() can be called once the object is in the
OBJECT_DEAD state. This results in the kernel oopsing when it tries to
invoke the handler for the state (which is hard coded to 0x2).
The way this comes about is something like the following:
(1) The object dispatcher is processing a work state for an object. This
is done in workqueue context.
(2) An out-of-band event comes in that isn't masked, causing the object to
be queued, say EV_KILL.
(3) The object dispatcher finishes processing the current work state on
that object and then sees there's another event to process, so,
without returning to the workqueue core, it processes that event too.
It then follows the chain of events that initiates until we reach
OBJECT_DEAD without going through a wait state (such as
WAIT_FOR_CLEARANCE).
At this point, object->events may be 0, object->event_mask will be 0
and oob_event_mask will be 0.
(4) The object dispatcher returns to the workqueue processor, and in due
course, this sees that the object's work item is still queued and
invokes it again.
(5) The current state is a work state (OBJECT_DEAD), so the dispatcher
jumps to it - resulting in an OOPS.
When I'm seeing this, the work state in (1) appears to have been either
LOOK_UP_OBJECT or CREATE_OBJECT (object->oob_table is
fscache_osm_lookup_oob).
The window for (2) is very small:
(A) object->event_mask is cleared whilst the event dispatch process is
underway - though there's no memory barrier to force this to the top
of the function.
The window, therefore is from the time the object was selected by the
workqueue processor and made requeueable to the time the mask was
cleared.
(B) fscache_raise_event() will only queue the object if it manages to set
the event bit and the corresponding event_mask bit was set.
The enqueuement is then deferred slightly whilst we get a ref on the
object and get the per-CPU variable for workqueue congestion. This
slight deferral slightly increases the probability by allowing extra
time for the workqueue to make the item requeueable.
Handle this by giving the dead state a processor function and checking the
for the dead state address rather than seeing if the processor function is
address 0x2. The dead state processor function can then set a flag to
indicate that it's occurred and give a warning if it occurs more than once
per object.
If this race occurs, an oops similar to the following is seen (note the RIP
value):
BUG: unable to handle kernel NULL pointer dereference at 0000000000000002
IP: [<0000000000000002>] 0x1
PGD 0
Oops: 0010 [#1] SMP
Modules linked in: ...
CPU: 17 PID: 16077 Comm: kworker/u48:9 Not tainted 3.10.0-327.18.2.el7.x86_64 #1
Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 12/27/2015
Workqueue: fscache_object fscache_object_work_func [fscache]
task: ffff880302b63980 ti: ffff880717544000 task.ti: ffff880717544000
RIP: 0010:[<0000000000000002>] [<0000000000000002>] 0x1
RSP: 0018:ffff880717547df8 EFLAGS: 00010202
RAX: ffffffffa0368640 RBX: ffff880edf7a4480 RCX: dead000000200200
RDX: 0000000000000002 RSI: 00000000ffffffff RDI: ffff880edf7a4480
RBP: ffff880717547e18 R08: 0000000000000000 R09: dfc40a25cb3a4510
R10: dfc40a25cb3a4510 R11: 0000000000000400 R12: 0000000000000000
R13: ffff880edf7a4510 R14: ffff8817f6153400 R15: 0000000000000600
FS: 0000000000000000(0000) GS:ffff88181f420000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000002 CR3: 000000000194a000 CR4: 00000000001407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
ffffffffa0363695 ffff880edf7a4510 ffff88093f16f900 ffff8817faa4ec00
ffff880717547e60 ffffffff8109d5db 00000000faa4ec18 0000000000000000
ffff8817faa4ec18 ffff88093f16f930 ffff880302b63980 ffff88093f16f900
Call Trace:
[<ffffffffa0363695>] ? fscache_object_work_func+0xa5/0x200 [fscache]
[<ffffffff8109d5db>] process_one_work+0x17b/0x470
[<ffffffff8109e4ac>] worker_thread+0x21c/0x400
[<ffffffff8109e290>] ? rescuer_thread+0x400/0x400
[<ffffffff810a5acf>] kthread+0xcf/0xe0
[<ffffffff810a5a00>] ? kthread_create_on_node+0x140/0x140
[<ffffffff816460d8>] ret_from_fork+0x58/0x90
[<ffffffff810a5a00>] ? kthread_create_on_node+0x140/0x140
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jeremy McNicoll <jeremymc@redhat.com>
Tested-by: Frank Sorenson <sorenson@redhat.com>
Tested-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 29905b52fad0854351f57bab867647e4982285bf upstream.
The function order_base_2() is defined (according to the comment block)
as returning zero on input zero, but subsequently passes the input into
roundup_pow_of_two(), which is explicitly undefined for input zero.
This has gone unnoticed until now, but optimization passes in GCC 7 may
produce constant folded function instances where a constant value of
zero is passed into order_base_2(), resulting in link errors against the
deliberately undefined '____ilog2_NaN'.
So update order_base_2() to adhere to its own documented interface.
[ See
http://marc.info/?l=linux-kernel&m=147672952517795&w=2
and follow-up discussion for more background. The gcc "optimization
pass" is really just broken, but now the GCC trunk problem seems to
have escaped out of just specially built daily images, so we need to
work around it in mainline. - Linus ]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The PM_QOS_CPU_DMA_LATENCY vote attached to an IRQ is discarded,
if it is affined to an isolated CPU. So we need atleast 1 CPU
in online and un-isolate state. The scheduler rejects isolating
a CPU if it is the only online and un-isolated CPU in the system.
Add the same check for CPU hotplug.
Change-Id: I5bdfe6e3bb0352ed3ae5a2de90097b73d248f3fc
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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Change the IPC wakelock name to include PID since
complete process name is not printed in many bugreports.
IPC wakelock are of format ipc<port_id>_<PID>_<proc_name>.
Improve debugfs logging to include port_id to service_id mapping
and the amount of transactions on each local port. This information
is helpful in associating a local port with the service ID. This
info is present in /d/dump_local_ports.
CRs-Fixed: 2063352
Change-Id: Id6406f89b3b61066399ef5660b9d2ab37bff6728
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>
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Ringing IPA MHI event ring doorbell is done at MHI device
during MHI channel start. This is done after the rings
are allocated. The ring write pointer updated by the host is
used as the doorbell value. Doorbell ringing is required
in order to supply event credits to GSI H/W.
Change-Id: I2db110b4f99c8ab6c6878d426b3ebb37149b0b76
Signed-off-by: Ghanim Fodi <gfodi@codeaurora.org>
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Add support to register a Floating type charger.
Change-Id: Ib65eff52a42d639a90f162488337a554deab4bfa
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>
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* refs/heads/tmp-e76c0fa
Linux 4.4.72
arm64: ensure extension of smp_store_release value
arm64: armv8_deprecated: ensure extension of addr
usercopy: Adjust tests to deal with SMAP/PAN
RDMA/qib,hfi1: Fix MR reference count leak on write with immediate
arm64: entry: improve data abort handling of tagged pointers
arm64: hw_breakpoint: fix watchpoint matching for tagged pointers
Make __xfs_xattr_put_listen preperly report errors.
NFSv4: Don't perform cached access checks before we've OPENed the file
NFS: Ensure we revalidate attributes before using execute_ok()
mm: consider memblock reservations for deferred memory initialization sizing
net: better skb->sender_cpu and skb->napi_id cohabitation
serial: sh-sci: Fix panic when serial console and DMA are enabled
tty: Drop krefs for interrupted tty lock
drivers: char: mem: Fix wraparound check to allow mappings up to the end
ASoC: Fix use-after-free at card unregistration
ALSA: timer: Fix missing queue indices reset at SNDRV_TIMER_IOCTL_SELECT
ALSA: timer: Fix race between read and ioctl
drm/nouveau/tmr: fully separate alarm execution/pending lists
drm/vmwgfx: Make sure backup_handle is always valid
drm/vmwgfx: limit the number of mip levels in vmw_gb_surface_define_ioctl()
drm/vmwgfx: Handle vmalloc() failure in vmw_local_fifo_reserve()
perf/core: Drop kernel samples even though :u is specified
powerpc/hotplug-mem: Fix missing endian conversion of aa_index
powerpc/numa: Fix percpu allocations to be NUMA aware
powerpc/eeh: Avoid use after free in eeh_handle_special_event()
scsi: qla2xxx: don't disable a not previously enabled PCI device
KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages
btrfs: fix memory leak in update_space_info failure path
btrfs: use correct types for page indices in btrfs_page_exists_in_range
cxl: Fix error path on bad ioctl
ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()
ufs: set correct ->s_maxsize
ufs: restore maintaining ->i_blocks
fix ufs_isblockset()
ufs: restore proper tail allocation
fs: add i_blocksize()
cpuset: consider dying css as offline
Input: elantech - add Fujitsu Lifebook E546/E557 to force crc_enabled
drm/msm: Expose our reservation object when exporting a dmabuf.
target: Re-add check to reject control WRITEs with overflow data
cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
random: properly align get_random_int_hash
drivers: char: random: add get_random_long()
iio: proximity: as3935: fix AS3935_INT mask
iio: light: ltr501 Fix interchanged als/ps register field
staging/lustre/lov: remove set_fs() call from lov_getstripe()
usb: chipidea: debug: check before accessing ci_role
usb: chipidea: udc: fix NULL pointer dereference if udc_start failed
usb: gadget: f_mass_storage: Serialize wake and sleep execution
ext4: fix fdatasync(2) after extent manipulation operations
ext4: keep existing extra fields when inode expands
ext4: fix SEEK_HOLE
xen-netfront: cast grant table reference first to type int
xen-netfront: do not cast grant table reference to signed short
xen/privcmd: Support correctly 64KB page granularity when mapping memory
dmaengine: ep93xx: Always start from BASE0
dmaengine: usb-dmac: Fix DMAOR AE bit definition
KVM: async_pf: avoid async pf injection when in guest mode
arm: KVM: Allow unaligned accesses at HYP
KVM: cpuid: Fix read/write out-of-bounds vulnerability in cpuid emulation
kvm: async_pf: fix rcu_irq_enter() with irqs enabled
nfsd: Fix up the "supattr_exclcreat" attributes
nfsd4: fix null dereference on replay
drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
crypto: gcm - wait for crypto op not signal safe
KEYS: fix freeing uninitialized memory in key_update()
KEYS: fix dereferencing NULL payload with nonzero length
ptrace: Properly initialize ptracer_cred on fork
serial: ifx6x60: fix use-after-free on module unload
arch/sparc: support NR_CPUS = 4096
sparc64: delete old wrap code
sparc64: new context wrap
sparc64: add per-cpu mm of secondary contexts
sparc64: redefine first version
sparc64: combine activate_mm and switch_mm
sparc64: reset mm cpumask after wrap
sparc: Machine description indices can vary
sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
net: bridge: start hello timer only if device is up
net: ethoc: enable NAPI before poll may be scheduled
net: ping: do not abuse udp_poll()
ipv6: Fix leak in ipv6_gso_segment().
vxlan: fix use-after-free on deletion
tcp: disallow cwnd undo when switching congestion control
cxgb4: avoid enabling napi twice to the same queue
ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()
bnx2x: Fix Multi-Cos
ANDROID: uid_sys_stats: check previous uid_entry before call find_or_register_uid
ANDROID: sdcardfs: d_splice_alias can return error values
Change-Id: I829ebf1a9271dcf0462c537e7bfcbcfde322f336
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
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Changes in 4.4.72
bnx2x: Fix Multi-Cos
ipv6: xfrm: Handle errors reported by xfrm6_find_1stfragopt()
cxgb4: avoid enabling napi twice to the same queue
tcp: disallow cwnd undo when switching congestion control
vxlan: fix use-after-free on deletion
ipv6: Fix leak in ipv6_gso_segment().
net: ping: do not abuse udp_poll()
net: ethoc: enable NAPI before poll may be scheduled
net: bridge: start hello timer only if device is up
sparc64: mm: fix copy_tsb to correctly copy huge page TSBs
sparc: Machine description indices can vary
sparc64: reset mm cpumask after wrap
sparc64: combine activate_mm and switch_mm
sparc64: redefine first version
sparc64: add per-cpu mm of secondary contexts
sparc64: new context wrap
sparc64: delete old wrap code
arch/sparc: support NR_CPUS = 4096
serial: ifx6x60: fix use-after-free on module unload
ptrace: Properly initialize ptracer_cred on fork
KEYS: fix dereferencing NULL payload with nonzero length
KEYS: fix freeing uninitialized memory in key_update()
crypto: gcm - wait for crypto op not signal safe
drm/amdgpu/ci: disable mclk switching for high refresh rates (v2)
nfsd4: fix null dereference on replay
nfsd: Fix up the "supattr_exclcreat" attributes
kvm: async_pf: fix rcu_irq_enter() with irqs enabled
KVM: cpuid: Fix read/write out-of-bounds vulnerability in cpuid emulation
arm: KVM: Allow unaligned accesses at HYP
KVM: async_pf: avoid async pf injection when in guest mode
dmaengine: usb-dmac: Fix DMAOR AE bit definition
dmaengine: ep93xx: Always start from BASE0
xen/privcmd: Support correctly 64KB page granularity when mapping memory
xen-netfront: do not cast grant table reference to signed short
xen-netfront: cast grant table reference first to type int
ext4: fix SEEK_HOLE
ext4: keep existing extra fields when inode expands
ext4: fix fdatasync(2) after extent manipulation operations
usb: gadget: f_mass_storage: Serialize wake and sleep execution
usb: chipidea: udc: fix NULL pointer dereference if udc_start failed
usb: chipidea: debug: check before accessing ci_role
staging/lustre/lov: remove set_fs() call from lov_getstripe()
iio: light: ltr501 Fix interchanged als/ps register field
iio: proximity: as3935: fix AS3935_INT mask
drivers: char: random: add get_random_long()
random: properly align get_random_int_hash
stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
cpufreq: cpufreq_register_driver() should return -ENODEV if init fails
target: Re-add check to reject control WRITEs with overflow data
drm/msm: Expose our reservation object when exporting a dmabuf.
Input: elantech - add Fujitsu Lifebook E546/E557 to force crc_enabled
cpuset: consider dying css as offline
fs: add i_blocksize()
ufs: restore proper tail allocation
fix ufs_isblockset()
ufs: restore maintaining ->i_blocks
ufs: set correct ->s_maxsize
ufs_extend_tail(): fix the braino in calling conventions of ufs_new_fragments()
ufs_getfrag_block(): we only grab ->truncate_mutex on block creation path
cxl: Fix error path on bad ioctl
btrfs: use correct types for page indices in btrfs_page_exists_in_range
btrfs: fix memory leak in update_space_info failure path
KVM: arm/arm64: Handle possible NULL stage2 pud when ageing pages
scsi: qla2xxx: don't disable a not previously enabled PCI device
powerpc/eeh: Avoid use after free in eeh_handle_special_event()
powerpc/numa: Fix percpu allocations to be NUMA aware
powerpc/hotplug-mem: Fix missing endian conversion of aa_index
perf/core: Drop kernel samples even though :u is specified
drm/vmwgfx: Handle vmalloc() failure in vmw_local_fifo_reserve()
drm/vmwgfx: limit the number of mip levels in vmw_gb_surface_define_ioctl()
drm/vmwgfx: Make sure backup_handle is always valid
drm/nouveau/tmr: fully separate alarm execution/pending lists
ALSA: timer: Fix race between read and ioctl
ALSA: timer: Fix missing queue indices reset at SNDRV_TIMER_IOCTL_SELECT
ASoC: Fix use-after-free at card unregistration
drivers: char: mem: Fix wraparound check to allow mappings up to the end
tty: Drop krefs for interrupted tty lock
serial: sh-sci: Fix panic when serial console and DMA are enabled
net: better skb->sender_cpu and skb->napi_id cohabitation
mm: consider memblock reservations for deferred memory initialization sizing
NFS: Ensure we revalidate attributes before using execute_ok()
NFSv4: Don't perform cached access checks before we've OPENed the file
Make __xfs_xattr_put_listen preperly report errors.
arm64: hw_breakpoint: fix watchpoint matching for tagged pointers
arm64: entry: improve data abort handling of tagged pointers
RDMA/qib,hfi1: Fix MR reference count leak on write with immediate
usercopy: Adjust tests to deal with SMAP/PAN
arm64: armv8_deprecated: ensure extension of addr
arm64: ensure extension of smp_store_release value
Linux 4.4.72
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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commit 864b9a393dcb5aed09b8fd31b9bbda0fdda99374 upstream.
We have seen an early OOM killer invocation on ppc64 systems with
crashkernel=4096M:
kthreadd invoked oom-killer: gfp_mask=0x16040c0(GFP_KERNEL|__GFP_COMP|__GFP_NOTRACK), nodemask=7, order=0, oom_score_adj=0
kthreadd cpuset=/ mems_allowed=7
CPU: 0 PID: 2 Comm: kthreadd Not tainted 4.4.68-1.gd7fe927-default #1
Call Trace:
dump_stack+0xb0/0xf0 (unreliable)
dump_header+0xb0/0x258
out_of_memory+0x5f0/0x640
__alloc_pages_nodemask+0xa8c/0xc80
kmem_getpages+0x84/0x1a0
fallback_alloc+0x2a4/0x320
kmem_cache_alloc_node+0xc0/0x2e0
copy_process.isra.25+0x260/0x1b30
_do_fork+0x94/0x470
kernel_thread+0x48/0x60
kthreadd+0x264/0x330
ret_from_kernel_thread+0x5c/0xa4
Mem-Info:
active_anon:0 inactive_anon:0 isolated_anon:0
active_file:0 inactive_file:0 isolated_file:0
unevictable:0 dirty:0 writeback:0 unstable:0
slab_reclaimable:5 slab_unreclaimable:73
mapped:0 shmem:0 pagetables:0 bounce:0
free:0 free_pcp:0 free_cma:0
Node 7 DMA free:0kB min:0kB low:0kB high:0kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:52428800kB managed:110016kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:320kB slab_unreclaimable:4672kB kernel_stack:1152kB pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
lowmem_reserve[]: 0 0 0 0
Node 7 DMA: 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB 0*8192kB 0*16384kB = 0kB
0 total pagecache pages
0 pages in swap cache
Swap cache stats: add 0, delete 0, find 0/0
Free swap = 0kB
Total swap = 0kB
819200 pages RAM
0 pages HighMem/MovableOnly
817481 pages reserved
0 pages cma reserved
0 pages hwpoisoned
the reason is that the managed memory is too low (only 110MB) while the
rest of the the 50GB is still waiting for the deferred intialization to
be done. update_defer_init estimates the initial memoty to initialize
to 2GB at least but it doesn't consider any memory allocated in that
range. In this particular case we've had
Reserving 4096MB of memory at 128MB for crashkernel (System RAM: 51200MB)
so the low 2GB is mostly depleted.
Fix this by considering memblock allocations in the initial static
initialization estimation. Move the max_initialise to
reset_deferred_meminit and implement a simple memblock_reserved_memory
helper which iterates all reserved blocks and sums the size of all that
start below the given address. The cumulative size is than added on top
of the initial estimation. This is still not ideal because
reset_deferred_meminit doesn't consider holes and so reservation might
be above the initial estimation whihch we ignore but let's make the
logic simpler until we really need to handle more complicated cases.
Fixes: 3a80a7fa7989 ("mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set")
Link: http://lkml.kernel.org/r/20170531104010.GI27783@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Tested-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 52bd2d62ce6758d811edcbd2256eb9ea7f6a56cb upstream.
skb->sender_cpu and skb->napi_id share a common storage,
and we had various bugs about this.
We had to call skb_sender_cpu_clear() in some places to
not leave a prior skb->napi_id and fool netdev_pick_tx()
As suggested by Alexei, we could split the space so that
these errors can not happen.
0 value being reserved as the common (not initialized) value,
let's reserve [1 .. NR_CPUS] range for valid sender_cpu,
and [NR_CPUS+1 .. ~0U] for valid napi_id.
This will allow proper busy polling support over tunnels.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 93407472a21b82f39c955ea7787e5bc7da100642 upstream.
Replace all 1 << inode->i_blkbits and (1 << inode->i_blkbits) in fs
branch.
This patch also fixes multiple checkpatch warnings: WARNING: Prefer
'unsigned int' to bare use of 'unsigned'
Thanks to Andrew Morton for suggesting more appropriate function instead
of macro.
[geliangtang@gmail.com: truncate: use i_blocksize()]
Link: http://lkml.kernel.org/r/9c8b2cd83c8f5653805d43debde9fa8817e02fc4.1484895804.git.geliangtang@gmail.com
Link: http://lkml.kernel.org/r/1481319905-10126-1-git-send-email-fabf@skynet.be
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 41c25707d21716826e3c1f60967f5550610ec1c9 upstream.
In most cases, a cgroup controller don't care about the liftimes of
cgroups. For the controller, a css becomes online when ->css_online()
is called on it and offline when ->css_offline() is called.
However, cpuset is special in that the user interface it exposes cares
whether certain cgroups exist or not. Combined with the RCU delay
between cgroup removal and css offlining, this can lead to user
visible behavior oddities where operations which should succeed after
cgroup removals fail for some time period. The effects of cgroup
removals are delayed when seen from userland.
This patch adds css_is_dying() which tests whether offline is pending
and updates is_cpuset_online() so that the function returns false also
while offline is pending. This gets rid of the userland visible
delays.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Link: http://lkml.kernel.org/r/327ca1f5-7957-fbb9-9e5f-9ba149d40ba2@oracle.com
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ec9ee4acd97c0039a61c0ae4f12705767ae62153 upstream.
Commit d07e22597d1d ("mm: mmap: add new /proc tunable for mmap_base
ASLR") added the ability to choose from a range of values to use for
entropy count in generating the random offset to the mmap_base address.
The maximum value on this range was set to 32 bits for 64-bit x86
systems, but this value could be increased further, requiring more than
the 32 bits of randomness provided by get_random_int(), as is already
possible for arm64. Add a new function: get_random_long() which more
naturally fits with the mmap usage of get_random_int() but operates
exactly the same as get_random_int().
Also, fix the shifting constant in mmap_rnd() to be an unsigned long so
that values greater than 31 bits generate an appropriate mask without
overflow. This is especially important on x86, as its shift instruction
uses a 5-bit mask for the shift operand, which meant that any value for
mmap_rnd_bits over 31 acts as a no-op and effectively disables mmap_base
randomization.
Finally, replace calls to get_random_int() with get_random_long() where
appropriate.
This patch (of 2):
Add get_random_long().
Signed-off-by: Daniel Cashman <dcashman@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Nick Kralevich <nnk@google.com>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Mark Salyzyn <salyzyn@android.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c70d9d809fdeecedb96972457ee45c49a232d97f upstream.
When I introduced ptracer_cred I failed to consider the weirdness of
fork where the task_struct copies the old value by default. This
winds up leaving ptracer_cred set even when a process forks and
the child process does not wind up being ptraced.
Because ptracer_cred is not set on non-ptraced processes whose
parents were ptraced this has broken the ability of the enlightenment
window manager to start setuid children.
Fix this by properly initializing ptracer_cred in ptrace_init_task
This must be done with a little bit of care to preserve the current value
of ptracer_cred when ptrace carries through fork. Re-reading the
ptracer_cred from the ptracing process at this point is inconsistent
with how PT_PTRACE_CAP has been maintained all of these years.
Tested-by: Takashi Iwai <tiwai@suse.de>
Fixes: 64b875f7ac8a ("ptrace: Capture the ptracer's creds not PT_PTRACE_CAP")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This descriptor describes the list of functions present in a given
configuration. There should be one such descriptor per configuration
supported by the device. The order in which these descriptors appear
in the BOS descriptor reflects the order of preference of configurations
as desired by the device for optimal functionality. Configuration Summary
descriptors are used by Host software to decide which Configuration to set
to obtain the desired functionality.
Change-Id: I7ec095ce19caa690c0d3dc0fdd3add5ad37a74f3
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
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The scheduling change (bug 31501544) to avoid putting RT threads on cores that
are handling softint's was catching cases where there was no reason
to believe the softint would take a long time, resulting in unnecessary
migration overhead. This patch reduces the migration to cases where
the core has a softint that is actually likely to take a long time,
as opposed to the RCU, SCHED, and TIMER softints that are rather quick.
Bug: 31752786
Change-Id: Ib4e179f1e15c736b2fdba31070494e357e9fbbe2
Git-commit: ce05770bd37b8065b61ef650108ecef2b97b148b
Git-repo: https://android.googlesource.com/kernel/msm
[pkondeti@codeaurora.org: resolved minor merge conflicts]
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
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