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* Merge android-4.4.107 (79f138a) into msm-4.4Srinivasarao P2018-01-18
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * refs/heads/tmp-79f138a Linux 4.4.107 ath9k: fix tx99 potential info leak IB/ipoib: Grab rtnl lock on heavy flush when calling ndo_open/stop RDMA/cma: Avoid triggering undefined behavior macvlan: Only deliver one copy of the frame to the macvlan interface udf: Avoid overflow when session starts at large offset scsi: bfa: integer overflow in debugfs scsi: sd: change allow_restart to bool in sysfs interface scsi: sd: change manage_start_stop to bool in sysfs interface vt6655: Fix a possible sleep-in-atomic bug in vt6655_suspend scsi: scsi_devinfo: Add REPORTLUN2 to EMC SYMMETRIX blacklist entry raid5: Set R5_Expanded on parity devices as well as data. pinctrl: adi2: Fix Kconfig build problem usb: musb: da8xx: fix babble condition handling tty fix oops when rmmod 8250 powerpc/perf/hv-24x7: Fix incorrect comparison in memord scsi: hpsa: destroy sas transport properties before scsi_host scsi: hpsa: cleanup sas_phy structures in sysfs when unloading PCI: Detach driver before procfs & sysfs teardown on device remove xfs: fix incorrect extent state in xfs_bmap_add_extent_unwritten_real xfs: fix log block underflow during recovery cycle verification l2tp: cleanup l2tp_tunnel_delete calls bcache: fix wrong cache_misses statistics bcache: explicitly destroy mutex while exiting GFS2: Take inode off order_write list when setting jdata flag thermal/drivers/step_wise: Fix temperature regulation misbehavior ppp: Destroy the mutex when cleanup clk: tegra: Fix cclk_lp divisor register clk: imx6: refine hdmi_isfr's parent to make HDMI work on i.MX6 SoCs w/o VPU clk: mediatek: add the option for determining PLL source clock mm: Handle 0 flags in _calc_vm_trans() macro crypto: tcrypt - fix buffer lengths in test_aead_speed() arm-ccn: perf: Prevent module unload while PMU is in use target/file: Do not return error for UNMAP if length is zero target:fix condition return in core_pr_dump_initiator_port() iscsi-target: fix memory leak in lio_target_tiqn_addtpg() target/iscsi: Fix a race condition in iscsit_add_reject_from_cmd() powerpc/ipic: Fix status get and status clear powerpc/opal: Fix EBUSY bug in acquiring tokens netfilter: ipvs: Fix inappropriate output of procfs powerpc/powernv/cpufreq: Fix the frequency read by /proc/cpuinfo PCI/PME: Handle invalid data when reading Root Status dmaengine: ti-dma-crossbar: Correct am335x/am43xx mux value type rtc: pcf8563: fix output clock rate video: fbdev: au1200fb: Return an error code if a memory allocation fails video: fbdev: au1200fb: Release some resources if a memory allocation fails video: udlfb: Fix read EDID timeout fbdev: controlfb: Add missing modes to fix out of bounds access sfc: don't warn on successful change of MAC target: fix race during implicit transition work flushes target: fix ALUA transition timeout handling target: Use system workqueue for ALUA transitions btrfs: add missing memset while reading compressed inline extents NFSv4.1 respect server's max size in CREATE_SESSION efi/esrt: Cleanup bad memory map log messages perf symbols: Fix symbols__fixup_end heuristic for corner cases net/mlx4_core: Avoid delays during VF driver device shutdown afs: Fix afs_kill_pages() afs: Fix page leak in afs_write_begin() afs: Populate and use client modification time afs: Fix the maths in afs_fs_store_data() afs: Prevent callback expiry timer overflow afs: Migrate vlocation fields to 64-bit afs: Flush outstanding writes when an fd is closed afs: Adjust mode bits processing afs: Populate group ID from vnode status afs: Fix missing put_page() drm/radeon: reinstate oland workaround for sclk mmc: mediatek: Fixed bug where clock frequency could be set wrong sched/deadline: Use deadline instead of period when calculating overflow sched/deadline: Throttle a constrained deadline task activated after the deadline sched/deadline: Make sure the replenishment timer fires in the next period drm/radeon/si: add dpm quirk for Oland fjes: Fix wrong netdevice feature flags scsi: hpsa: limit outstanding rescans scsi: hpsa: update check for logical volume status openrisc: fix issue handling 8 byte get_user calls intel_th: pci: Add Gemini Lake support mlxsw: reg: Fix SPVMLR max record count mlxsw: reg: Fix SPVM max record count net: Resend IGMP memberships upon peer notification. dmaengine: Fix array index out of bounds warning in __get_unmap_pool() net: wimax/i2400m: fix NULL-deref at probe writeback: fix memory leak in wb_queue_work() netfilter: bridge: honor frag_max_size when refragmenting drm/omap: fix dmabuf mmap for dma_alloc'ed buffers Input: i8042 - add TUXEDO BU1406 (N24_25BU) to the nomux list NFSD: fix nfsd_reset_versions for NFSv4. NFSD: fix nfsd_minorversion(.., NFSD_AVAIL) net: bcmgenet: Power up the internal PHY before probing the MII net: bcmgenet: power down internal phy if open or resume fails net: bcmgenet: reserved phy revisions must be checked first net: bcmgenet: correct MIB access of UniMAC RUNT counters net: bcmgenet: correct the RBUF_OVFL_CNT and RBUF_ERR_CNT MIB values net: initialize msg.msg_flags in recvfrom userfaultfd: selftest: vm: allow to build in vm/ directory userfaultfd: shmem: __do_fault requires VM_FAULT_NOPAGE md-cluster: free md_cluster_info if node leave cluster usb: phy: isp1301: Add OF device ID table mac80211: Fix addition of mesh configuration element KEYS: add missing permission check for request_key() destination ext4: fix crash when a directory's i_size is too small ext4: fix fdatasync(2) after fallocate(2) operation dmaengine: dmatest: move callback wait queue to thread context sched/rt: Do not pull from current CPU if only one CPU to pull xhci: Don't add a virt_dev to the devs array before it's fully allocated Bluetooth: btusb: driver to enable the usb-wakeup feature ceph: drop negative child dentries before try pruning inode's alias usbip: fix stub_send_ret_submit() vulnerability to null transfer_buffer USB: core: prevent malicious bNumInterfaces overflow USB: uas and storage: Add US_FL_BROKEN_FUA for another JMicron JMS567 ID tracing: Allocate mask_str buffer dynamically autofs: fix careless error in recent commit crypto: salsa20 - fix blkcipher_walk API usage crypto: hmac - require that the underlying hash algorithm is unkeyed UPSTREAM: arm64: setup: introduce kaslr_offset() UPSTREAM: kcov: fix comparison callback signature UPSTREAM: kcov: support comparison operands collection UPSTREAM: kcov: remove pointless current != NULL check UPSTREAM: kcov: support compat processes UPSTREAM: kcov: simplify interrupt check UPSTREAM: kcov: make kcov work properly with KASLR enabled UPSTREAM: kcov: add more missing includes UPSTREAM: kcov: add missing #include <linux/sched.h> UPSTREAM: kcov: properly check if we are in an interrupt UPSTREAM: kcov: don't profile branches in kcov UPSTREAM: kcov: don't trace the code coverage code BACKPORT: kernel: add kcov code coverage Conflicts: Makefile mm/kasan/Makefile scripts/Makefile.lib Change-Id: Ic19953706ea2e700621b0ba94d1c90bbffa4f471 Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
| * BACKPORT: kernel: add kcov code coverageDmitry Vyukov2017-12-18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kcov provides code coverage collection for coverage-guided fuzzing (randomized testing). Coverage-guided fuzzing is a testing technique that uses coverage feedback to determine new interesting inputs to a system. A notable user-space example is AFL (http://lcamtuf.coredump.cx/afl/). However, this technique is not widely used for kernel testing due to missing compiler and kernel support. kcov does not aim to collect as much coverage as possible. It aims to collect more or less stable coverage that is function of syscall inputs. To achieve this goal it does not collect coverage in soft/hard interrupts and instrumentation of some inherently non-deterministic or non-interesting parts of kernel is disbled (e.g. scheduler, locking). Currently there is a single coverage collection mode (tracing), but the API anticipates additional collection modes. Initially I also implemented a second mode which exposes coverage in a fixed-size hash table of counters (what Quentin used in his original patch). I've dropped the second mode for simplicity. This patch adds the necessary support on kernel side. The complimentary compiler support was added in gcc revision 231296. We've used this support to build syzkaller system call fuzzer, which has found 90 kernel bugs in just 2 months: https://github.com/google/syzkaller/wiki/Found-Bugs We've also found 30+ bugs in our internal systems with syzkaller. Another (yet unexplored) direction where kcov coverage would greatly help is more traditional "blob mutation". For example, mounting a random blob as a filesystem, or receiving a random blob over wire. Why not gcov. Typical fuzzing loop looks as follows: (1) reset coverage, (2) execute a bit of code, (3) collect coverage, repeat. A typical coverage can be just a dozen of basic blocks (e.g. an invalid input). In such context gcov becomes prohibitively expensive as reset/collect coverage steps depend on total number of basic blocks/edges in program (in case of kernel it is about 2M). Cost of kcov depends only on number of executed basic blocks/edges. On top of that, kernel requires per-thread coverage because there are always background threads and unrelated processes that also produce coverage. With inlined gcov instrumentation per-thread coverage is not possible. kcov exposes kernel PCs and control flow to user-space which is insecure. But debugfs should not be mapped as user accessible. Based on a patch by Quentin Casasnovas. [akpm@linux-foundation.org: make task_struct.kcov_mode have type `enum kcov_mode'] [akpm@linux-foundation.org: unbreak allmodconfig] [akpm@linux-foundation.org: follow x86 Makefile layout standards] Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: syzkaller <syzkaller@googlegroups.com> Cc: Vegard Nossum <vegard.nossum@oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Tavis Ormandy <taviso@google.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Kees Cook <keescook@google.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: David Drysdale <drysdale@google.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Bug: 64145065 (cherry-picked from 5c9a8750a6409c63a0f01d51a9024861022f6593) Change-Id: I17b5e04f6e89b241924e78ec32ead79c38b860ce Signed-off-by: Paul Lawrence <paullawrence@google.com>
* | Merge android-4.4@d6fbbe5 (v4.4.93) into msm-4.4Blagovest Kolenichev2017-10-20
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * refs/heads/tmp-d6fbbe5 Linux 4.4.93 x86/alternatives: Fix alt_max_short macro to really be a max() USB: serial: console: fix use-after-free after failed setup USB: serial: qcserial: add Dell DW5818, DW5819 USB: serial: option: add support for TP-Link LTE module USB: serial: cp210x: add support for ELV TFD500 USB: serial: ftdi_sio: add id for Cypress WICED dev board fix unbalanced page refcounting in bio_map_user_iov direct-io: Prevent NULL pointer access in submit_page_section usb: gadget: composite: Fix use-after-free in usb_composite_overwrite_options ALSA: line6: Fix leftover URB at error-path during probe ALSA: caiaq: Fix stray URB at probe error path ALSA: seq: Fix copy_from_user() call inside lock ALSA: seq: Fix use-after-free at creating a port ALSA: usb-audio: Kill stray URB at exiting iommu/amd: Finish TLB flush in amd_iommu_unmap() usb: renesas_usbhs: Fix DMAC sequence for receiving zero-length packet KVM: nVMX: fix guest CR4 loading when emulating L2 to L1 exit crypto: shash - Fix zero-length shash ahash digest crash HID: usbhid: fix out-of-bounds bug dmaengine: edma: Align the memcpy acnt array size with the transfer MIPS: math-emu: Remove pr_err() calls from fpu_emu() USB: dummy-hcd: Fix deadlock caused by disconnect detection rcu: Allow for page faults in NMI handlers iwlwifi: mvm: use IWL_HCMD_NOCOPY for MCAST_FILTER_CMD nl80211: Define policy for packet pattern attributes CIFS: Reconnect expired SMB sessions ext4: in ext4_seek_{hole,data}, return -ENXIO for negative offsets brcmfmac: add length check in brcmf_cfg80211_escan_handler() ANDROID: HACK: arm64: use -mno-implicit-float instead of -mgeneral-regs-only sched: Update task->on_rq when tasks are moving between runqueues FROMLIST: f2fs: expose some sectors to user in inline data or dentry case crypto: Work around deallocated stack frame reference gcc bug on sparc. UPSTREAM: f2fs: fix potential panic during fstrim ANDROID: fscrypt: remove unnecessary fscrypto.h ANDROID: binder: fix node sched policy calculation ANDROID: Kbuild, LLVMLinux: allow overriding clang target triple CHROMIUM: arm64: Disable asm-operand-width warning for clang CHROMIUM: kbuild: clang: Disable the 'duplicate-decl-specifier' warning UPSTREAM: x86/build: Use cc-option to validate stack alignment parameter UPSTREAM: x86/build: Fix stack alignment for CLang UPSTREAM: efi/libstub/arm64: Set -fpie when building the EFI stub BACKPORT: efi/libstub/arm64: Force 'hidden' visibility for section markers UPSTREAM: compiler, clang: always inline when CONFIG_OPTIMIZE_INLINING is disabled UPSTREAM: x86/boot: #undef memcpy() et al in string.c UPSTREAM: crypto: arm64/sha - avoid non-standard inline asm tricks UPSTREAM: kbuild: clang: Disable 'address-of-packed-member' warning UPSTREAM: x86/build: Specify stack alignment for clang UPSTREAM: x86/build: Use __cc-option for boot code compiler options BACKPORT: kbuild: Add __cc-option macro UPSTREAM: x86/hweight: Don't clobber %rdi BACKPORT: x86/hweight: Get rid of the special calling convention BACKPORT: x86/mm/kaslr: Use the _ASM_MUL macro for multiplication to work around Clang incompatibility UPSTREAM: crypto, x86: aesni - fix token pasting for clang UPSTREAM: x86/kbuild: Use cc-option to enable -falign-{jumps/loops} UPSTREAM: compiler, clang: properly override 'inline' for clang UPSTREAM: compiler, clang: suppress warning for unused static inline functions UPSTREAM: Kbuild: provide a __UNIQUE_ID for clang UPSTREAM: modules: mark __inittest/__exittest as __maybe_unused BACKPORT: kbuild: Add support to generate LLVM assembly files UPSTREAM: kbuild: use -Oz instead of -Os when using clang BACKPORT: kbuild, LLVMLinux: Add -Werror to cc-option to support clang UPSTREAM: kbuild: drop -Wno-unknown-warning-option from clang options UPSTREAM: kbuild: fix asm-offset generation to work with clang UPSTREAM: kbuild: consolidate redundant sed script ASM offset generation UPSTREAM: kbuild: Consolidate header generation from ASM offset information UPSTREAM: kbuild: clang: add -no-integrated-as to KBUILD_[AC]FLAGS UPSTREAM: kbuild: Add better clang cross build support Conflicts: arch/x86/lib/Makefile net/wireless/nl80211.c Change-Id: I76032e8d1206903bc948b9ed918e7ddee7e746c7 Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>
| * UPSTREAM: kbuild: fix asm-offset generation to work with clangJeroen Hofstee2017-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | KBuild abuses the asm statement to write to a file and clang chokes about these invalid asm statements. Hack it even more by fooling this is actual valid asm code. [masahiro: Import Jeroen's work for U-Boot: http://patchwork.ozlabs.org/patch/375026/ Tweak sed script a little to avoid garbage '#' for GCC case, like #define NR_PAGEFLAGS 23 /* __NR_PAGEFLAGS # */ ] Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Tested-by: Matthias Kaehlcke <mka@chromium.org> (cherry picked from commit cf0c3e68aa81f992b0301f62e341b710d385bf68) Signed-off-by: Greg Hackmann <ghackmann@google.com> Change-Id: Ifbfd4eff59a7f4304f0d8fdcba4075100244562f
| * UPSTREAM: kbuild: consolidate redundant sed script ASM offset generationMasahiro Yamada2017-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This part ended up in redundant code after touched by multiple people. [1] Commit 3234282f33b2 ("x86, asm: Fix CFI macro invocations to deal with shortcomings in gas") added parentheses for defined expressions to support old gas for x86. [2] Commit a22dcdb0032c ("x86, asm: Fix ancient-GAS workaround") split the pattern into two to avoid parentheses for non-numeric expressions. [3] Commit 95a2f6f72d37 ("Partially revert patch that encloses asm-offset.h numbers in brackets") removed parentheses from numeric expressions as well because parentheses in MN10300 assembly have a special meaning (pointer access). Apparently, there is a conflict between [1] and [3]. After all, [3] took precedence, and a long time has passed since then. Now, merge the two patterns again because the first one is covered by the other. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> (cherry picked from commit 7dd47b95b0f54f2057d40af6e66d477e3fe95d13) Signed-off-by: Greg Hackmann <ghackmann@google.com> Change-Id: Idf9e632df984fbc9cb834e7f7b5d33f21da87dbc
| * UPSTREAM: kbuild: Consolidate header generation from ASM offset informationMatthias Kaehlcke2017-10-09
| | | | | | | | | | | | | | | | | | | | | | | | | | Largely redundant code is used in different places to generate C headers from offset information extracted from assembly language output. Consolidate the code in Makefile.lib and use this instead. Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> (cherry picked from commit ebf003f0cfb3705e60d40dedc3ec949176c741af) Signed-off-by: Greg Hackmann <ghackmann@google.com> Change-Id: I0acd54dd27c0cf0868f221bd63728a9b67320b25
* | scripts: correct cflags for kasanMao Jinlong2017-09-11
| | | | | | | | | | | | | | Enable address sanitizer flags for kasan by default. Change-Id: Ib08149a7d1af589fed3ce30659cb495d4bb2fb81 Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>
* | scripts: Makefile: add support to use external DTCShashank Mittal2017-04-06
| | | | | | | | | | | | | | Add support to use external DTC to compile device tree blobs. Change-Id: I268d2332d5328c3b0050b35c96f91e8ef9e1f6f8 Signed-off-by: Shashank Mittal <mittals@codeaurora.org>
* | kasan: Kconfig: Add KASAN_SANITIZE_ALLPatrick Daly2016-03-22
| | | | | | | | | | | | | | | | | | | | Allow enabling KASAN on a per-directory or per-file basis rather than for the entire kernel. Change-Id: I9a491d3ab0df4c42302a258b9edb3b78cf4e1db0 Signed-off-by: Patrick Daly <pdaly@codeaurora.org> [satyap: trivial merge conflict resolution] Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
* | UBSAN: run-time undefined behavior sanity checkerAndrey Ryabinin2016-03-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | UBSAN uses compile-time instrumentation to catch undefined behavior (UB). Compiler inserts code that perform certain kinds of checks before operations that could cause UB. If check fails (i.e. UB detected) __ubsan_handle_* function called to print error message. So the most of the work is done by compiler. This patch just implements ubsan handlers printing errors. GCC has this capability since 4.9.x [1] (see -fsanitize=undefined option and its suboptions). However GCC 5.x has more checkers implemented [2]. Article [3] has a bit more details about UBSAN in the GCC. [1] - https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/Debugging-Options.html [2] - https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html [3] - http://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/ Issues which UBSAN has found thus far are: Found bugs: * out-of-bounds access - 97840cb67ff5 ("netfilter: nfnetlink: fix insufficient validation in nfnetlink_bind") undefined shifts: * d48458d4a768 ("jbd2: use a better hash function for the revoke table") * 10632008b9e1 ("clockevents: Prevent shift out of bounds") * 'x << -1' shift in ext4 - http://lkml.kernel.org/r/<5444EF21.8020501@samsung.com> * undefined rol32(0) - http://lkml.kernel.org/r/<1449198241-20654-1-git-send-email-sasha.levin@oracle.com> * undefined dirty_ratelimit calculation - http://lkml.kernel.org/r/<566594E2.3050306@odin.com> * undefined roundown_pow_of_two(0) - http://lkml.kernel.org/r/<1449156616-11474-1-git-send-email-sasha.levin@oracle.com> * [WONTFIX] undefined shift in __bpf_prog_run - http://lkml.kernel.org/r/<CACT4Y+ZxoR3UjLgcNdUm4fECLMx2VdtfrENMtRRCdgHB2n0bJA@mail.gmail.com> WONTFIX here because it should be fixed in bpf program, not in kernel. signed overflows: * 32a8df4e0b33f ("sched: Fix odd values in effective_load() calculations") * mul overflow in ntp - http://lkml.kernel.org/r/<1449175608-1146-1-git-send-email-sasha.levin@oracle.com> * incorrect conversion into rtc_time in rtc_time64_to_tm() - http://lkml.kernel.org/r/<1449187944-11730-1-git-send-email-sasha.levin@oracle.com> * unvalidated timespec in io_getevents() - http://lkml.kernel.org/r/<CACT4Y+bBxVYLQ6LtOKrKtnLthqLHcw-BMp3aqP3mjdAvr9FULQ@mail.gmail.com> * [NOTABUG] signed overflow in ktime_add_safe() - http://lkml.kernel.org/r/<CACT4Y+aJ4muRnWxsUe1CMnA6P8nooO33kwG-c8YZg=0Xc8rJqw@mail.gmail.com> [akpm@linux-foundation.org: fix unused local warning] [akpm@linux-foundation.org: fix __int128 build woes] Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michal Marek <mmarek@suse.cz> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Yury Gribov <y.gribov@samsung.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Git-repo: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/ Git-commit: c6d308534aef6c99904bf5862066360ae067abc4 [tsoni@codeaurora.org: trivial merge conflict resolution] CRs-Fixed: 969533 Change-Id: I048b9936b1120e0d375b7932c59de78d8ef8f411 Signed-off-by: Trilok Soni <tsoni@codeaurora.org> [satyap@codeaurora.org: trivial merge conflict resolution] Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
* | ARM: convert build of appended dtb zImage to list of dtbsColin Cross2016-03-01
|/ | | | | | | | | | | Allow CONFIG_BUILD_ARM_APPENDED_DTB_IMAGE_NAMES to specify a space separated list of dtbs to append to the zImage, and name the resulting file zImage-dtb Change-Id: I36d9108a2349bdbb373e95076dcb1417d8c7dce6 Signed-off-by: Colin Cross <ccross@android.com> (cherry picked from commit 1307afc31753a515832702ff17e788de4f6f5d7c)
* ARM: convert build of appended dtb zImage to list of dtbsColin Cross2016-02-16
| | | | | | | | | Allow CONFIG_BUILD_ARM_APPENDED_DTB_IMAGE_NAMES to specify a space separated list of dtbs to append to the zImage, and name the resulting file zImage-dtb Change-Id: Ied5d0bafbd1d01fc1f109c15c4283de7029903c9 Signed-off-by: Colin Cross <ccross@android.com>
* kbuild: Create directory for target DTBNathan Rossi2015-04-03
| | | | | | | | | | | When building specific DTBs out of the kernel tree the vendor subdirs (boot/dts/<vendor>) are not created, ensure that they are before building the DTB. Signed-off-by: Nathan Rossi <nathan.rossi@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Olof Johansson <olof@lixom.net>
* kasan: add kernel address sanitizer infrastructureAndrey Ryabinin2015-02-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Kernel Address sanitizer (KASan) is a dynamic memory error detector. It provides fast and comprehensive solution for finding use-after-free and out-of-bounds bugs. KASAN uses compile-time instrumentation for checking every memory access, therefore GCC > v4.9.2 required. v4.9.2 almost works, but has issues with putting symbol aliases into the wrong section, which breaks kasan instrumentation of globals. This patch only adds infrastructure for kernel address sanitizer. It's not available for use yet. The idea and some code was borrowed from [1]. Basic idea: The main idea of KASAN is to use shadow memory to record whether each byte of memory is safe to access or not, and use compiler's instrumentation to check the shadow memory on each memory access. Address sanitizer uses 1/8 of the memory addressable in kernel for shadow memory and uses direct mapping with a scale and offset to translate a memory address to its corresponding shadow address. Here is function to translate address to corresponding shadow address: unsigned long kasan_mem_to_shadow(unsigned long addr) { return (addr >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET; } where KASAN_SHADOW_SCALE_SHIFT = 3. So for every 8 bytes there is one corresponding byte of shadow memory. The following encoding used for each shadow byte: 0 means that all 8 bytes of the corresponding memory region are valid for access; k (1 <= k <= 7) means that the first k bytes are valid for access, and other (8 - k) bytes are not; Any negative value indicates that the entire 8-bytes are inaccessible. Different negative values used to distinguish between different kinds of inaccessible memory (redzones, freed memory) (see mm/kasan/kasan.h). To be able to detect accesses to bad memory we need a special compiler. Such compiler inserts a specific function calls (__asan_load*(addr), __asan_store*(addr)) before each memory access of size 1, 2, 4, 8 or 16. These functions check whether memory region is valid to access or not by checking corresponding shadow memory. If access is not valid an error printed. Historical background of the address sanitizer from Dmitry Vyukov: "We've developed the set of tools, AddressSanitizer (Asan), ThreadSanitizer and MemorySanitizer, for user space. We actively use them for testing inside of Google (continuous testing, fuzzing, running prod services). To date the tools have found more than 10'000 scary bugs in Chromium, Google internal codebase and various open-source projects (Firefox, OpenSSL, gcc, clang, ffmpeg, MySQL and lots of others): [2] [3] [4]. The tools are part of both gcc and clang compilers. We have not yet done massive testing under the Kernel AddressSanitizer (it's kind of chicken and egg problem, you need it to be upstream to start applying it extensively). To date it has found about 50 bugs. Bugs that we've found in upstream kernel are listed in [5]. We've also found ~20 bugs in out internal version of the kernel. Also people from Samsung and Oracle have found some. [...] As others noted, the main feature of AddressSanitizer is its performance due to inline compiler instrumentation and simple linear shadow memory. User-space Asan has ~2x slowdown on computational programs and ~2x memory consumption increase. Taking into account that kernel usually consumes only small fraction of CPU and memory when running real user-space programs, I would expect that kernel Asan will have ~10-30% slowdown and similar memory consumption increase (when we finish all tuning). I agree that Asan can well replace kmemcheck. We have plans to start working on Kernel MemorySanitizer that finds uses of unitialized memory. Asan+Msan will provide feature-parity with kmemcheck. As others noted, Asan will unlikely replace debug slab and pagealloc that can be enabled at runtime. Asan uses compiler instrumentation, so even if it is disabled, it still incurs visible overheads. Asan technology is easily portable to other architectures. Compiler instrumentation is fully portable. Runtime has some arch-dependent parts like shadow mapping and atomic operation interception. They are relatively easy to port." Comparison with other debugging features: ======================================== KMEMCHECK: - KASan can do almost everything that kmemcheck can. KASan uses compile-time instrumentation, which makes it significantly faster than kmemcheck. The only advantage of kmemcheck over KASan is detection of uninitialized memory reads. Some brief performance testing showed that kasan could be x500-x600 times faster than kmemcheck: $ netperf -l 30 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost (127.0.0.1) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec no debug: 87380 16384 16384 30.00 41624.72 kasan inline: 87380 16384 16384 30.00 12870.54 kasan outline: 87380 16384 16384 30.00 10586.39 kmemcheck: 87380 16384 16384 30.03 20.23 - Also kmemcheck couldn't work on several CPUs. It always sets number of CPUs to 1. KASan doesn't have such limitation. DEBUG_PAGEALLOC: - KASan is slower than DEBUG_PAGEALLOC, but KASan works on sub-page granularity level, so it able to find more bugs. SLUB_DEBUG (poisoning, redzones): - SLUB_DEBUG has lower overhead than KASan. - SLUB_DEBUG in most cases are not able to detect bad reads, KASan able to detect both reads and writes. - In some cases (e.g. redzone overwritten) SLUB_DEBUG detect bugs only on allocation/freeing of object. KASan catch bugs right before it will happen, so we always know exact place of first bad read/write. [1] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel [2] https://code.google.com/p/address-sanitizer/wiki/FoundBugs [3] https://code.google.com/p/thread-sanitizer/wiki/FoundBugs [4] https://code.google.com/p/memory-sanitizer/wiki/FoundBugs [5] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel#Trophies Based on work by Andrey Konovalov. Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com> Acked-by: Michal Marek <mmarek@suse.cz> Signed-off-by: Andrey Konovalov <adech.fo@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Konstantin Serebryany <kcc@google.com> Cc: Dmitry Chernenkov <dmitryc@google.com> Cc: Yuri Gribov <tetra2005@gmail.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Christoph Lameter <cl@linux.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dts, kbuild: Factor out dtbs install rules to Makefile.dtbinstRobert Richter2014-10-21
| | | | | | | | | | Move dtbs install rules to Makefile.dtbinst. This change is needed to implement support for dts vendor subdirs. The change makes Makefiles easier and smaller as no longer the dtbs_install rule needs to be defined. Another advantage is that install goals are not encoded in targets anymore (%.dtb_dtbinst_). Signed-off-by: Robert Richter <rrichter@cavium.com>
* kbuild: handle multi-objs dependency appropriatelyMasahiro Yamada2014-08-19
| | | | | | | | | | | | | | | | | | | | | | | | | | The comment in scripts/Makefile.build says as follows: We would rather have a list of rules like foo.o: $(foo-objs) but that's not so easy, so we rather make all composite objects depend on the set of all their parts This commit makes it possible! For example, assume a Makefile like this obj-m = foo.o bar.o foo-objs := foo1.o foo2.o bar-objs := bar1.o bar2.o Without this patch, foo.o depends on all of foo1.o foo2.o bar1.o bar2.o. It looks funny that foo.o is regenerated when bar1.c is updated. Now we can handle the dependency of foo.o and bar.o separately. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: trivial - remove trailing spacesMasahiro Yamada2014-04-30
| | | | | Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* Merge branch 'kbuild' of ↵Linus Torvalds2014-04-07
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kbuild changes from Michal Marek: - cleanups in the main Makefiles and Documentation/DocBook/Makefile - make O=... directory is automatically created if needed - mrproper/distclean removes the old include/linux/version.h to make life easier when bisecting across the commit that moved the version.h file * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: docbook: fix the include error when executing "make help" kbuild: create a build directory automatically for out-of-tree build kbuild: remove redundant '.*.cmd' pattern from make distclean kbuild: move "quote" to Kbuild.include to be consistent kbuild: docbook: use $(obj) and $(src) rather than specific path kbuild: unconditionally clobber include/linux/version.h on distclean kbuild: docbook: specify KERNELDOC dependency correctly kbuild: docbook: include cmd files more simply kbuild: specify build_docproc as a phony target
| * kbuild: move "quote" to Kbuild.include to be consistentMasahiro Yamada2014-03-29
| | | | | | | | | | Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* | Merge tag 'v3.14-rc5' into HEADGrant Likely2014-03-04
|\ \ | | | | | | | | | Linux 3.14-rc5
| * | of: Move testcase FDT data into drivers/ofGrant Likely2014-02-20
| |/ | | | | | | | | | | | | | | | | | | | | | | The testcase data is usable by any platform. This patch moves it into the drivers/of directory so it can be included by any architecture. Using the test cases requires manually adding #include <testcases.dtsi> to the end of the boards .dtsi file and enabling CONFIG_OF_SELFTEST. Not pretty though. A useful project would be to make the testcase code easier to execute. Signed-off-by: Grant Likely <grant.likely@linaro.org>
* / kbuild: dtbs_install: new make targetJason Cooper2014-02-20
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unlike other build products in the Linux kernel, there is no 'make *install' mechanism to put devicetree blobs in a standard place. This commit adds a new 'dtbs_install' make target which copies all of the dtbs into the INSTALL_DTBS_PATH directory. INSTALL_DTBS_PATH can be set before calling make to change the default install directory. If not set then it defaults to: $INSTALL_PATH/dtbs/$KERNELRELEASE. This is done to keep dtbs from different kernel versions separate until things have settled down. Once the dtbs are stable, and not so strongly linked to the kernel version, the devicetree files will most likely move to their own repo. Users will need to upgrade install scripts at that time. v7: (reworked by Grant Likely) - Moved rules from arch/arm/Makefile to arch/arm/boot/dts/Makefile so that each dtb install could have a separate target and be reported as part of the make output. - Fixed dependency problem to ensure $KERNELRELEASE is calculated before attempting to install - Removed option to call external script. Copying the files should be sufficient and a build system can post-process the install directory. Despite the fact an external script is used for installing the kernel, I don't think that is a pattern that should be encouraged. I would rather see buildroot type tools post process the install directory to rename or move dtb files after installing to a staging directory. - Plus it is easy to add a hook after the fact without blocking the rest of this feature. - Move the helper targets into scripts/Makefile.lib with the rest of the common dtb rules Signed-off-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Grant Likely <grant.likely@linaro.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Russell King <linux@arm.linux.org.uk> Cc: Rob Herring <robh+dt@kernel.org>
* Merge branch 'kbuild' of ↵Linus Torvalds2013-07-10
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild Pull kbuild updates from Michal Marek: - fix for make headers_install argv explosion with too long path - scripts/setlocalversion does not call git update-index needlessly - fix for the src.rpm produced by make rpm-pkg. The new make image_name can be useful also for other packaging tools. - scripts/mod/devicetable-offsets.o is not rebuilt during each make run - make modules_install dependency fix - scripts/sortextable portability fix - fix for kbuild to generate the output directory for all object files in subdirs. - a couple of minor fixes * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: kbuild: create directory for dir/file.o tools/include: use stdint types for user-space byteshift headers Makefile: Fix install error with make -j option Fix a build warning in scripts/mod/file2alias.c improve modalias building scripts/mod: Spelling s/DEVICEVTABLE/DEVICETABLE/ kbuild: fix error when building from src rpm scripts/setlocalversion on write-protected source tree Makefile.lib: align DTB quiet_cmd kbuild: fix make headers_install when path is too long
| * kbuild: create directory for dir/file.o张忠山2013-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When add a obj with dir to obj-y, like this obj-y += dir/file.o The $(obj)/dir not created, this patch fix this. When try to add a file(which in a subdir) to my board's obj-y, the build progress crashed. For example, I use at91rm9200ek board, and in kernel dir run: mkdir objtree make O=objtree at91rm9200_defconfig mkdir arch/arm/mach-at91/dir touch arch/arm/mach-at91/dir/file.c and edit arch/arm/mach-at91/dir/file.c to add some code. then edit arch/arm/mach-at91/Makefile, change the following line: obj-$(CONFIG_MACH_AT91RM9200EK) += board-rm9200ek.o to: obj-$(CONFIG_MACH_AT91RM9200EK) += board-rm9200ek.o dir/file.o Now build it: make O=objtree Then the error appears: ... CC arch/arm/mach-at91/board-rm9200dk.o CC arch/arm/mach-at91/board-rm9200ek.o CC arch/arm/mach-at91/dir/file.o linux-2.6/arch/arm/mach-at91/dir/file.c:5: fatal error: opening dependency file arch/arm/mach-at91/dir/.file.o.d: No such file or directory Check the objtree: LANG=en ls objtree/arch/arm/mach-at91/dir ls: cannot access objtree/arch/arm/mach-at91/dir: No such file or directory It's apparently that the target dir not created for file.o Check kbuild source code. It seems that kbuild create dirs for that in $(obj-dirs). But if the dir need not to create a built-in.o, It should never in $(obj-dirs). So I make this patch to make sure It in $(obj-dirs) this bug caused by commit f5fb976520a53f45f8bbf2e851f16b3b5558d485 Signed-off-by: 张忠山 <zzs0213@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
| * Makefile.lib: align DTB quiet_cmdJames Hogan2013-06-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The unaligned dtb.S filename in make output started to irritate me: DTC arch/metag/boot/dts/skeleton.dtb DTB arch/metag/boot/dts/skeleton.dtb.S AS arch/metag/boot/dts/skeleton.dtb.o LD arch/metag/boot/dts/built-in.o Add an extra space to quiet_cmd_dt_S_dtb so the dtb.S filename aligns with all the others. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Dirk Brandewie <dirk.brandewie@gmail.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: trivial@kernel.org Signed-off-by: Michal Marek <mmarek@suse.cz>
* | lib: add support for LZ4-compressed kernelKyungsik Lee2013-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for extracting LZ4-compressed kernel images, as well as LZ4-compressed ramdisk images in the kernel boot process. Signed-off-by: Kyungsik Lee <kyungsik.lee@lge.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Florian Fainelli <florian@openwrt.org> Cc: Yann Collet <yann.collet.73@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kbuild: make sure we clean up DTB temporary filesIan Campbell2013-06-13
| | | | | | | | | | | | | | | | | | | | Various temporary files used when building DTB files were not suffixed with .tmp and therefore were not cleaned up by "make clean". Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
* | kbuild: Don't assume dts files live in arch/*/boot/dtsMatthijs Kooijman2013-05-23
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit b40b25ff (kbuild: always run gcc -E on *.dts, remove cmd_dtc_cpp), dts building was changed to always use the C preprocessor. This meant that the .dts file passed to dtc is not the original, but the preprocessed one. When compiling with a separate build directory (i.e., with O=), this preprocessed file will not live in the same directory as the original. When the .dts file includes .dtsi files, dtc will look for them in the build directory, not in the source directory and compilation will fail. The commit referenced above tried to fix this by passing arch/*/boot/dts as an include path to dtc. However, for mips, the .dts files are not in this directory, so dts compilation on mips breaks for some targets. Instead of hardcoding this particular include path, this commit just uses the directory of the .dts file that is being compiled, which effectively restores the previous behaviour wrt includes. For most .dts files, this path is just the same as the previous hardcoded arch/*/boot/dts path. This was tested on a mips (rt3052) and an arm (bcm2835) target. Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* Merge tag 'modules-next-for-linus' of ↵Linus Torvalds2013-05-05
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull mudule updates from Rusty Russell: "We get rid of the general module prefix confusion with a binary config option, fix a remove/insert race which Never Happens, and (my favorite) handle the case when we have too many modules for a single commandline. Seriously, the kernel is full, please go away!" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: modpost: fix unwanted VMLINUX_SYMBOL_STR expansion X.509: Support parse long form of length octets in Authority Key Identifier module: don't unlink the module until we've removed all exposure. kernel: kallsyms: memory override issue, need check destination buffer length MODSIGN: do not send garbage to stderr when enabling modules signature modpost: handle huge numbers of modules. modpost: add -T option to read module names from file/stdin. modpost: minor cleanup. genksyms: pass symbol-prefix instead of arch module: fix symbol versioning with symbol prefixes CONFIG_SYMBOL_PREFIX: cleanup.
| * CONFIG_SYMBOL_PREFIX: cleanup.Rusty Russell2013-03-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have CONFIG_SYMBOL_PREFIX, which three archs define to the string "_". But Al Viro broke this in "consolidate cond_syscall and SYSCALL_ALIAS declarations" (in linux-next), and he's not the first to do so. Using CONFIG_SYMBOL_PREFIX is awkward, since we usually just want to prefix it so something. So various places define helpers which are defined to nothing if CONFIG_SYMBOL_PREFIX isn't set: 1) include/asm-generic/unistd.h defines __SYMBOL_PREFIX. 2) include/asm-generic/vmlinux.lds.h defines VMLINUX_SYMBOL(sym) 3) include/linux/export.h defines MODULE_SYMBOL_PREFIX. 4) include/linux/kernel.h defines SYMBOL_PREFIX (which differs from #7) 5) kernel/modsign_certificate.S defines ASM_SYMBOL(sym) 6) scripts/modpost.c defines MODULE_SYMBOL_PREFIX 7) scripts/Makefile.lib defines SYMBOL_PREFIX on the commandline if CONFIG_SYMBOL_PREFIX is set, so that we have a non-string version for pasting. (arch/h8300/include/asm/linkage.h defines SYMBOL_NAME(), too). Let's solve this properly: 1) No more generic prefix, just CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX. 2) Make linux/export.h usable from asm. 3) Define VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR(). 4) Make everyone use them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> Tested-by: James Hogan <james.hogan@imgtec.com> (metag)
* | kbuild: always run gcc -E on *.dts, remove cmd_dtc_cppStephen Warren2013-04-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace cmd_dtc with cmd_dtc_cpp, and delete the latter. Previously, a special file extension (.dtsp) was required to trigger the C pre-processor to run on device tree files. This was ugly. Now that previous changes have enhanced cmd_dtc_cpp to collect dependency information from both gcc -E and dtc, we can transparently run the pre- processor on all device tree files, irrespective of whether they use /include/ or #include syntax to include *.dtsi. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Rob Herring <rob.herring@calxeda.com>
* | kbuild: cmd_dtc_cpp: extract deps from both gcc -E and dtcStephen Warren2013-04-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Prior to this change, when compiling *.dts to *.dtb, the dependency output from dtc would be used, and when compiling *.dtsp to *.dtb, the dependency output from gcc -E alone would be used, despite dtc also being invoked (on a temporary file that was guaranteed to have no dependencies). With this change, when compiling *.dtsp to *.dtb, the dependency files from both gcc -E and dtc are used. This will allow cmd_dtc_cpp to replace cmd_dtc in a future change. In turn, that will allow the C pre- processor to be run transparently on *.dts, without the need to a separate rule or file extension to trigger it. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Rob Herring <rob.herring@calxeda.com>
* | kbuild: create an "include chroot" for DT bindingsStephen Warren2013-04-05
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent dtc+cpp support allows header files and C pre-processor defines/macros to be used when compiling device tree files. These headers will typically define various constants that are part of the device tree bindings. The original patch which set up the dtc+cpp include path only considered using those headers from device tree files. However, most are also useful for kernel code which needs to interpret the device tree. In both the DT files and the kernel, I'd like to include the DT-related headers in the same way, for example, <dt-bindings/gpio/tegra-gpio.h>. That will simplify any text which discusses the DT header locations. Creating a <dt-bindings/> for kernel source to use is as simple as placing files into include/dt-bindings/. However, when compiling DT files, the include path should be restricted so that only the dt-bindings path is available; arbitrary kernel headers shouldn't be exposed. For this reason, create a specific include directory for use by dtc+cpp, and symlink dt-bindings from there to the actual location of include/dt-bindings/. For want of a better location, place this "include chroot" into the existing dts/ directory. arch/*/boot/dts/include/dt-bindings -> ../../../../../include/dt-bindings Some headers used by device tree files may not be useful to the kernel; they may be used simply to aid in constructing the DT file (e.g. macros to create a node), but not define any information that the kernel needs to share. These may be placed directly into arch/*/boot/dts/ along with the DT files themselves. Acked-by: Michal Marek <mmarek@suse.cz> Acked-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Stephen Warren <swarren@nvidia.com>
* kbuild: limit dtc+cpp include pathStephen Warren2013-02-13
| | | | | | | | | | | | | | | | Device tree source files may now include header files. The intent is that those header files define/name constants used as part of the DT bindings. Currently this feature is open to abuse, since any kernel header file at all can be included, This could allow device tree files to become dependant on kernel headers files, and thus make them no longer OS-independent. This would also prevent separating the device tree source files from the kernel repository. Solve this by limiting the cpp include path for device tree files to separate directories. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* kbuild: create a rule to run the pre-processor on *.dts filesStephen Warren2013-02-08
| | | | | | | | | | | | | Create cmd_dtc_cpp to run the C pre-processor on *.dts file before passing them to dtc for final compilation. This allows the use of #define and #include within the .dts file. Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Michal Marek <mmarek@suse.cz> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@st.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* kbuild: centralize .dts->.dtb ruleStephen Warren2012-11-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All architectures that use cmd_dtc do so in almost the same way. Create a central build rule to avoid duplication. The one difference is that most current uses of dtc build $(obj)/%.dtb from $(src)/dts/%.dts rather than building the .dtb in the same directory as the .dts file. This difference will be eliminated arch-by-arch in future patches. MIPS is the exception here; it already uses the exact same rule as the new common rule, so the duplicate is removed in this patch to avoid any conflict. arch/mips changes courtesy of Ralf Baechle. Update Documentation/kbuild to remove the explicit call to cmd_dtc from the example, now that the rule exists in a centralized location. Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-arm-kernel@lists.infradead.org Cc: Olof Johansson <olof@lixom.net> Cc: Russell King <linux@arm.linux.org.uk> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: linux@lists.openrisc.net Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: linux-c6x-dev@linux-c6x.org Cc: Mark Salter <msalter@redhat.com> Cc: Michal Simek <monstr@monstr.eu> Cc: microblaze-uclinux@itee.uq.edu.au Cc: Chris Zankel <chris@zankel.net> Cc: linux-xtensa@linux-xtensa.org Cc: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
* Kbuild: centralize MKIMAGE and cmd_uimage definitionsStephen Warren2012-03-26
| | | | | | | | | | | | | | | All ARCHs have the same definition of MKIMAGE. Move it to Makefile.lib to avoid duplication. All ARCHs have similar definitions of cmd_uimage. Place a sufficiently parameterized version in Makefile.lib to avoid duplication. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: Nicolas Pitre <nico@linaro.org> Tested-by: Mike Frysinger <vapier@gentoo.org> [Blackfin] Tested-by: Michal Simek <monstr@monstr.eu> [Microblaze] Tested-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32] Signed-off-by: Michal Marek <mmarek@suse.cz>
* Kbuild: Use dtc's -d (dependency) optionStephen Warren2012-01-15
| | | | | | | | | | | | | | | | | | | | This hooks dtc into Kbuild's dependency system. Thus, for example, "make dtbs" will rebuild tegra-harmony.dtb if only tegra20.dtsi has changed yet tegra-harmony.dts has not. The previous lack of this feature recently caused me to have very confusing "git bisect" results. For ARM, it's obvious what to add to $(targets). I'm not familiar enough with other architectures to know what to add there. Powerpc appears to already add various .dtb files into $(targets), but the other archs may need something added to $(targets) to work. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Shawn Guo <shawn.guo@linaro.org> [mmarek: Dropped arch/c6x part to avoid merging commits from the middle of the merge window] Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: Fix comment in Makefile.libMichal Marek2012-01-08
| | | | | | | | | | KBUILD_MODNAME is not defined for files that are linked into multiple modules, and trying to change reality to match documentation would result in all sorts of trouble. E.g. options for built-in modules would be called either foo_bar.param, foo.param, or bar.param, depending on the configuration. So just change the comment. Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: prevent make from deleting _shipped filesPeter Foley2011-08-31
| | | | | | | | | | | | commit 7373f4f (kbuild: add implicit rules for parser generation) created a implicit rule chain (%.c: %.c_shipped: %.y). Make considers the _shipped files to be intermediate files which causes them to be deleted if they didn't exist before make was run. Mark the _shipped files PRECIOUS to prevent make from deleting them. Signed-off-by: Peter Foley <pefoley2@verizon.net> Acked-by: Arnaud Lacombe <lacombar@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: simplify the %_shipped ruleArnaud Lacombe2011-06-09
| | | | | | | This is needed to have make(1) correctly link the implicit rules which generate the _shipped file from the lexer/parser to the final file. Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
* kbuild: add implicit rules for parser generationArnaud Lacombe2011-06-09
| | | | | | Cc: David Gibson <david@gibson.dropbear.id.au> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
* kbuild: Call gzip with -nMichal Marek2011-04-18
| | | | | | The timestamps recorded in the .gz files add no value. Signed-off-by: Michal Marek <mmarek@suse.cz>
* decompressors: add XZ decompressor moduleLasse Collin2011-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In userspace, the .lzma format has become mostly a legacy file format that got superseded by the .xz format. Similarly, LZMA Utils was superseded by XZ Utils. These patches add support for XZ decompression into the kernel. Most of the code is as is from XZ Embedded <http://tukaani.org/xz/embedded.html>. It was written for the Linux kernel but is usable in other projects too. Advantages of XZ over the current LZMA code in the kernel: - Nice API that can be used by other kernel modules; it's not limited to kernel, initramfs, and initrd decompression. - Integrity check support (CRC32) - BCJ filters improve compression of executable code on certain architectures. These together with LZMA2 can produce a few percent smaller kernel or Squashfs images than plain LZMA without making the decompression slower. This patch: Add the main decompression code (xz_dec), testing module (xz_dec_test), wrapper script (xz_wrap.sh) for the xz command line tool, and documentation. The xz_dec module is enough to have a usable XZ decompressor e.g. for Squashfs. Signed-off-by: Lasse Collin <lasse.collin@tukaani.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Alain Knaff <alain@knaff.lu> Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com> Cc: Phillip Lougher <phillip@lougher.demon.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* of: Add support for linking device tree blobs into vmlinuxDirk Brandewie2010-12-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for linking device tree blob(s) into vmlinux. Modifies asm-generic/vmlinux.lds.h to add linking .dtb sections into vmlinux. To maintain compatiblity with the of/fdt driver code platforms MUST copy the blob to a non-init memory location before the kernel frees the .init.* sections in the image. Modifies scripts/Makefile.lib to add a kbuild command to compile DTS files to device tree blobs and a rule to create objects to wrap the blobs for linking. STRUCT_ALIGNMENT is defined in vmlinux.lds.h for use in the rule to create wrapper objects for the dtb in Makefile.lib. The STRUCT_ALIGN() macro in vmlinux.lds.h is modified to use the STRUCT_ALIGNMENT definition. The DTB's are placed on 32 byte boundries to allow parsing the blob with driver/of/fdt.c during early boot without having to copy the blob to get the structure alignment GCC expects. A DTB is linked in by adding the DTB object to the list of objects to be linked into vmlinux in the archtecture specific Makefile using obj-y += foo.dtb.o Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Acked-by: Michal Marek <mmarek@suse.cz> [grant.likely@secretlab.ca: cleaned up whitespace inconsistencies] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* Merge branch 'kbuild' of ↵Linus Torvalds2010-10-28
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: initramfs: Fix build break on symbol-prefixed archs initramfs: fix initramfs size calculation initramfs: generalize initramfs_data.xxx.S variants scripts/kallsyms: Enable error messages while hush up unnecessary warnings scripts/setlocalversion: update comment kbuild: Use a single clean rule for kernel and external modules kbuild: Do not run make clean in $(srctree) scripts/mod/modpost.c: fix commentary accordingly to last changes kbuild: Really don't clean bounds.h and asm-offsets.h
| * initramfs: Fix build break on symbol-prefixed archsMike Frysinger2010-10-28
| | | | | | | | | | Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* | jump label: Convert dynamic debug to use jump labelsJason Baron2010-09-22
|/ | | | | | | | Convert the 'dynamic debug' infrastructure to use jump labels. Signed-off-by: Jason Baron <jbaron@redhat.com> LKML-Reference: <b77627358cea3e27d7be4386f45f66219afb8452.1284733808.git.jbaron@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* Merge branch 'for-35' of git://repo.or.cz/linux-kbuildLinus Torvalds2010-06-01
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-35' of git://repo.or.cz/linux-kbuild: (81 commits) kbuild: Revert part of e8d400a to resolve a conflict kbuild: Fix checking of scm-identifier variable gconfig: add support to show hidden options that have prompts menuconfig: add support to show hidden options which have prompts gconfig: remove show_debug option gconfig: remove dbg_print_ptype() and dbg_print_stype() kconfig: fix zconfdump() kconfig: some small fixes add random binaries to .gitignore kbuild: Include gen_initramfs_list.sh and the file list in the .d file kconfig: recalc symbol value before showing search results .gitignore: ignore *.lzo files headerdep: perlcritic warning scripts/Makefile.lib: Align the output of LZO kbuild: Generate modules.builtin in make modules_install Revert "kbuild: specify absolute paths for cscope" kbuild: Do not unnecessarily regenerate modules.builtin headers_install: use local file handles headers_check: fix perl warnings export_report: fix perl warnings ...
| * scripts/Makefile.lib: Align the output of LZOWu Zhangjin2010-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | The output of LZO is not aligned with the other output: ... CC drivers/usb/mon/usbmon.mod.o LZO arch/mips/boot/compressed/vmlinux.lzo ... This patch fixes it. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
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