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commit 420cb1b764f9169c5d2601b4af90e4a1702345ee upstream.
The untagged vlan object is only destroyed when the interface is removed
via the legacy sysfs interface. But it also has to be destroyed when the
standard rtnl-link interface is used.
Fixes: 5d2c05b21337 ("batman-adv: add per VLAN interface attribute framework")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3b55e4422087f9f7b241031d758a0c65584e4297 upstream.
The skb_linearize may reallocate the skb. This makes the calculated pointer
for ethhdr invalid. But it the pointer is used later to fill in the RR
field of the batadv_icmp_packet_rr packet.
Instead re-evaluate eth_hdr after the skb_linearize+skb_cow to fix the
pointer and avoid the invalid read.
Fixes: da6b8c20a5b8 ("batman-adv: generalize batman-adv icmp packet handling")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9c4604a298e0a9807eaf2cd912d1ebf24d98fbeb upstream.
The tt_req_node is added and removed from a list inside a spinlock. But the
locking is sometimes removed even when the object is still referenced and
will be used later via this reference. For example batadv_send_tt_request
can create a new tt_req_node (including add to a list) and later
re-acquires the lock to remove it from the list and to free it. But at this
time another context could have already removed this tt_req_node from the
list and freed it.
CPU#0
batadv_batman_skb_recv from net_device 0
-> batadv_iv_ogm_receive
-> batadv_iv_ogm_process
-> batadv_iv_ogm_process_per_outif
-> batadv_tvlv_ogm_receive
-> batadv_tvlv_ogm_receive
-> batadv_tvlv_containers_process
-> batadv_tvlv_call_handler
-> batadv_tt_tvlv_ogm_handler_v1
-> batadv_tt_update_orig
-> batadv_send_tt_request
-> batadv_tt_req_node_new
spin_lock(...)
allocates new tt_req_node and adds it to list
spin_unlock(...)
return tt_req_node
CPU#1
batadv_batman_skb_recv from net_device 1
-> batadv_recv_unicast_tvlv
-> batadv_tvlv_containers_process
-> batadv_tvlv_call_handler
-> batadv_tt_tvlv_unicast_handler_v1
-> batadv_handle_tt_response
spin_lock(...)
tt_req_node gets removed from list and is freed
spin_unlock(...)
CPU#0
<- returned to batadv_send_tt_request
spin_lock(...)
tt_req_node gets removed from list and is freed
MEMORY CORRUPTION/SEGFAULT/...
spin_unlock(...)
This can only be solved via reference counting to allow multiple contexts
to handle the list manipulation while making sure that only the last
context holding a reference will free the object.
Fixes: a73105b8d4c7 ("batman-adv: improved client announcement mechanism")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Tested-by: Martin Weinelt <martin@darmstadt.freifunk.net>
Tested-by: Amadeus Alfa <amadeus@chemnitz.freifunk.net>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 63d443efe8be2c1d02b30d7e4edeb9aa085352b3 upstream.
batadv_send_skb_to_orig() calls dev_queue_xmit() so we can't use skb->len.
Fixes: 953324776d6d ("batman-adv: network coding - buffer unicast packets before forward")
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e123705e58bf171be8c6eb0902ebfb5d6ed255ad upstream.
Two parallel calls to batadv_neigh_node_new() might race for creating
and adding the same neig_node. Fix this by including the check for any
already existing, identical neigh_node within the spin-lock.
This fixes splats like the following:
[ 739.535069] ------------[ cut here ]------------
[ 739.535079] WARNING: CPU: 0 PID: 0 at /usr/src/batman-adv/git/batman-adv/net/batman-adv/bat_iv_ogm.c:1004 batadv_iv_ogm_process_per_outif+0xe3f/0xe60 [batman_adv]()
[ 739.535092] too many matching neigh_nodes
[ 739.535094] Modules linked in: dm_mod tun ip6table_filter ip6table_mangle ip6table_nat nf_nat_ipv6 ip6_tables xt_nat iptable_nat nf_nat_ipv4 nf_nat xt_TCPMSS xt_mark iptable_mangle xt_tcpudp xt_conntrack iptable_filter ip_tables x_tables ip_gre ip_tunnel gre bridge stp llc thermal_sys kvm_intel kvm crct10dif_pclmul crc32_pclmul sha256_ssse3 sha256_generic hmac drbg ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd evdev pcspkr ip6_gre ip6_tunnel tunnel6 batman_adv(O) libcrc32c nf_conntrack_ipv6 nf_defrag_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack autofs4 ext4 crc16 mbcache jbd2 xen_netfront xen_blkfront crc32c_intel
[ 739.535177] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O 4.2.0-0.bpo.1-amd64 #1 Debian 4.2.6-3~bpo8+2
[ 739.535186] 0000000000000000 ffffffffa013b050 ffffffff81554521 ffff88007d003c18
[ 739.535201] ffffffff8106fa01 0000000000000000 ffff8800047a087a ffff880079c3a000
[ 739.735602] ffff88007b82bf40 ffff88007bc2d1c0 ffffffff8106fa7a ffffffffa013aa8e
[ 739.735624] Call Trace:
[ 739.735639] <IRQ> [<ffffffff81554521>] ? dump_stack+0x40/0x50
[ 739.735677] [<ffffffff8106fa01>] ? warn_slowpath_common+0x81/0xb0
[ 739.735692] [<ffffffff8106fa7a>] ? warn_slowpath_fmt+0x4a/0x50
[ 739.735715] [<ffffffffa012448f>] ? batadv_iv_ogm_process_per_outif+0xe3f/0xe60 [batman_adv]
[ 739.735740] [<ffffffffa0124813>] ? batadv_iv_ogm_receive+0x363/0x380 [batman_adv]
[ 739.735762] [<ffffffffa0124813>] ? batadv_iv_ogm_receive+0x363/0x380 [batman_adv]
[ 739.735783] [<ffffffff810b0841>] ? __raw_callee_save___pv_queued_spin_unlock+0x11/0x20
[ 739.735804] [<ffffffffa012cb39>] ? batadv_batman_skb_recv+0xc9/0x110 [batman_adv]
[ 739.735825] [<ffffffff81464891>] ? __netif_receive_skb_core+0x841/0x9a0
[ 739.735838] [<ffffffff810b0841>] ? __raw_callee_save___pv_queued_spin_unlock+0x11/0x20
[ 739.735853] [<ffffffff81465681>] ? process_backlog+0xa1/0x140
[ 739.735864] [<ffffffff81464f1a>] ? net_rx_action+0x20a/0x320
[ 739.735878] [<ffffffff81073aa7>] ? __do_softirq+0x107/0x270
[ 739.735891] [<ffffffff81073d82>] ? irq_exit+0x92/0xa0
[ 739.735905] [<ffffffff8137e0d1>] ? xen_evtchn_do_upcall+0x31/0x40
[ 739.735924] [<ffffffff8155b8fe>] ? xen_do_hypervisor_callback+0x1e/0x40
[ 739.735939] <EOI> [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[ 739.735965] [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[ 739.735979] [<ffffffff8100a39c>] ? xen_safe_halt+0xc/0x20
[ 739.735991] [<ffffffff8101da6c>] ? default_idle+0x1c/0xa0
[ 739.736004] [<ffffffff810abf6b>] ? cpu_startup_entry+0x2eb/0x350
[ 739.736019] [<ffffffff81b2af5e>] ? start_kernel+0x480/0x48b
[ 739.736032] [<ffffffff81b2d116>] ? xen_start_kernel+0x507/0x511
[ 739.736048] ---[ end trace c106bb901244bc8c ]---
Fixes: f987ed6ebd99 ("batman-adv: protect neighbor list with rcu locks")
Reported-by: Martin Weinelt <martin@darmstadt.freifunk.net>
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a33d970d0b54b09746d5540af8271fad4eb10229 upstream.
The batadv_tt_local_entry was specific to a batadv_softif_vlan and held an
implicit reference to it. But this reference was never stored in form of a
pointer in the tt_local_entry itself. Instead batadv_tt_local_remove,
batadv_tt_local_table_free and batadv_tt_local_purge_pending_clients depend
on a consistent state of bat_priv->softif_vlan_list and that
batadv_softif_vlan_get always returns the batadv_softif_vlan object which
it has a reference for. But batadv_softif_vlan_get cannot guarantee that
because it is working only with rcu_read_lock on this list. It can
therefore happen that an vid is in this list twice or that
batadv_softif_vlan_get cannot find the batadv_softif_vlan for an vid due to
some other list operations taking place at the same time.
Instead add a batadv_softif_vlan pointer directly in batadv_tt_local_entry
which will be used for the reference counter decremented on release of
batadv_tt_local_entry.
Fixes: 35df3b298fc8 ("batman-adv: fix TT VLAN inconsistency on VLAN re-add")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 140ed8e87ca8f4875c2b146cdb2cdbf0c9ac6080 upstream.
The references to the network device should be dropped inside the release
function for batadv_hard_iface similar to what is done with the batman-adv
internal datastructures.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f2d23861b818d08bcd15cc1612ae94aa33b3931c upstream.
The shutdown of an batman-adv interface can happen with one of its slave
interfaces still being in the BATADV_IF_TO_BE_ACTIVATED state. A possible
reason for it is that the routing algorithm BATMAN_V was selected and
batadv_schedule_bat_ogm was not yet called for this interface. This slave
interface still has to be set to BATADV_IF_INACTIVE or the batman-adv
interface will never reduce its usage counter and thus never gets shutdown.
This problem can be simulated via:
$ modprobe dummy
$ modprobe batman-adv routing_algo=BATMAN_V
$ ip link add bat0 type batadv
$ ip link set dummy0 master bat0
$ ip link set dummy0 up
$ ip link del bat0
unregister_netdevice: waiting for bat0 to become free. Usage count = 3
Reported-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e48474ed8a217b7f80f2a42bc05352406a06cb67 upstream.
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
[sven@narfation.org: fix conflicts with current version]
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit d285f52cc0f23564fd61976d43fd5b991b4828f6 upstream.
The undefined behavior sanatizer detected an signed integer overflow in a
setup with near perfect link quality
UBSAN: Undefined behaviour in net/batman-adv/bat_iv_ogm.c:1246:25
signed integer overflow:
8713350 * 255 cannot be represented in type 'int'
The problems happens because the calculation of mixed unsigned and signed
integers resulted in an integer multiplication.
batadv_ogm_packet::tq (u8 255)
* tq_own (u8 255)
* tq_asym_penalty (int 134; max 255)
* tq_iface_penalty (int 255; max 255)
The tq_iface_penalty, tq_asym_penalty and inv_asym_penalty can just be
changed to unsigned int because they are not expected to become negative.
Fixes: c039876892e3 ("batman-adv: add WiFi penalty")
Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f7dcdf5fdbe8fec7670d8f65a5db595c98e0ecab upstream.
The function batadv_iv_ogm_orig_add_if allocates new buffers for bcast_own
and bcast_own_sum. It is expected that these buffers are unchanged in case
either bcast_own or bcast_own_sum couldn't be resized.
But the error handling of this function frees the already resized buffer
for bcast_own when the allocation of the new bcast_own_sum buffer failed.
This will lead to an invalid memory access when some code will try to
access bcast_own.
Instead the resized new bcast_own buffer has to be kept. This will not lead
to problems because the size of the buffer was only increased and therefore
no user of the buffer will try to access bytes outside of the new buffer.
Fixes: d0015fdd3d2c ("batman-adv: provide orig_node routing API")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1bc4e2b000e7fa9773d6623bc8850561ce10a4fb upstream.
batman-adv checks in different situation if a new device is already on top
of a different batman-adv device. This is done by getting the iflink of a
device and all its parent. It assumes that this iflink is always a parent
device in an acyclic graph. But this assumption is broken by devices like
veth which are actually a pair of two devices linked to each other. The
recursive check would therefore get veth0 when calling dev_get_iflink on
veth1. And it gets veth0 when calling dev_get_iflink with veth1.
Creating a veth pair and loading batman-adv freezes parts of the system
ip link add veth0 type veth peer name veth1
modprobe batman-adv
An RCU stall will be detected on the system which cannot be fixed.
INFO: rcu_sched self-detected stall on CPU
1: (5264 ticks this GP) idle=3e9/140000000000001/0
softirq=144683/144686 fqs=5249
(t=5250 jiffies g=46 c=45 q=43)
Task dump for CPU 1:
insmod R running task 0 247 245 0x00000008
ffffffff8151f140 ffffffff8107888e ffff88000fd141c0 ffffffff8151f140
0000000000000000 ffffffff81552df0 ffffffff8107b420 0000000000000001
ffff88000e3fa700 ffffffff81540b00 ffffffff8107d667 0000000000000001
Call Trace:
<IRQ> [<ffffffff8107888e>] ? rcu_dump_cpu_stacks+0x7e/0xd0
[<ffffffff8107b420>] ? rcu_check_callbacks+0x3f0/0x6b0
[<ffffffff8107d667>] ? hrtimer_run_queues+0x47/0x180
[<ffffffff8107cf9d>] ? update_process_times+0x2d/0x50
[<ffffffff810873fb>] ? tick_handle_periodic+0x1b/0x60
[<ffffffff810290ae>] ? smp_trace_apic_timer_interrupt+0x5e/0x90
[<ffffffff813bbae2>] ? apic_timer_interrupt+0x82/0x90
<EOI> [<ffffffff812c3fd7>] ? __dev_get_by_index+0x37/0x40
[<ffffffffa0031f3e>] ? batadv_hard_if_event+0xee/0x3a0 [batman_adv]
[<ffffffff812c5801>] ? register_netdevice_notifier+0x81/0x1a0
[...]
This can be avoided by checking if two devices are each others parent and
stopping the check in this situation.
Fixes: b7eddd0b3950 ("batman-adv: prevent using any virtual device created on batman-adv as hard-interface")
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
[sven@narfation.org: rewritten description, extracted fix]
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3db152093efb750bc47fd4d69355b90b18113105 upstream.
The batadv_orig_node_vlan reference counter in batadv_tt_global_size_mod
can only be reduced when the list entry was actually removed. Otherwise the
reference counter may reach zero when batadv_tt_global_size_mod is called
from two different contexts for the same orig_node_vlan but only one
context is actually removing the entry from the list.
The release function for this orig_node_vlan is not called inside the
vlan_list_lock spinlock protected region because the function
batadv_tt_global_size_mod still holds a orig_node_vlan reference for the
object pointer on the stack. Thus the actual release function (when
required) will be called only at the end of the function.
Fixes: 7ea7b4a14275 ("batman-adv: make the TT CRC logic VLAN specific")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c18bdd018e8912ca73ad6c12120b7283b5038875 upstream.
The batadv_gw_node reference counter in batadv_gw_node_update can only be
reduced when the list entry was actually removed. Otherwise the reference
counter may reach zero when batadv_gw_node_update is called from two
different contexts for the same gw_node but only one context is actually
removing the entry from the list.
The release function for this gw_node is not called inside the list_lock
spinlock protected region because the function batadv_gw_node_update still
holds a gw_node reference for the object pointer on the stack. Thus the
actual release function (when required) will be called only at the end of
the function.
Fixes: bd3524c14bd0 ("batman-adv: remove obsolete deleted attribute for gateway node")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 13bbdd370f67aef3351ad7bbc2fb624e3c23f905 upstream.
batadv_iv_ogm_orig_del_if removes a part of the bcast_own which previously
belonged to the now removed interface. This is done by copying all data
which comes before the removed interface and then appending all the data
which comes after the removed interface.
The address calculation for the position of the data which comes after the
removed interface assumed that the bat_iv.bcast_own is a pointer to a
single byte datatype. But it is a pointer to unsigned long and thus the
calculated position was wrong off factor sizeof(unsigned long).
Fixes: 83a8342678a0 ("more basic routing code added (forwarding packets / bitarray added)")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit d6c066fda90d578aacdf19771a027ed484a79825 upstream.
Add a sanity check to efivar_store_raw() the same way
efivar_{attr,size,data}_read() and efivar_show_raw() have it.
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200305084041.24053-3-vdronov@redhat.com
Link: https://lore.kernel.org/r/20200308080859.21568-25-ardb@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b6f6118901d1e867ac9177bbff3b00b185bd4fdc upstream.
IPV6_ADDRFORM is able to transform IPv6 socket to IPv4 one.
While this operation sounds illogical, we have to support it.
One of the things it does for TCP socket is to switch sk->sk_prot
to tcp_prot.
We now have other layers playing with sk->sk_prot, so we should make
sure to not interfere with them.
This patch makes sure sk_prot is the default pointer for TCP IPv6 socket.
syzbot reported :
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD a0113067 P4D a0113067 PUD a8771067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10686 Comm: syz-executor.0 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246
RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40
RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5
R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098
R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000
FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
inet_release+0x165/0x1c0 net/ipv4/af_inet.c:427
__sock_release net/socket.c:605 [inline]
sock_close+0xe1/0x260 net/socket.c:1283
__fput+0x2e4/0x740 fs/file_table.c:280
____fput+0x15/0x20 fs/file_table.c:313
task_work_run+0x176/0x1b0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop arch/x86/entry/common.c:164 [inline]
prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195
syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278
do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c429
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f2ae75dac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 00007f2ae75db6d4 RCX: 000000000045c429
RDX: 0000000000000001 RSI: 000000000000011a RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000038 R09: 0000000000000000
R10: 0000000020000180 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a9d R14: 00000000004ccfb4 R15: 000000000076bf2c
Modules linked in:
CR2: 0000000000000000
---[ end trace 82567b5207e87bae ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246
RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40
RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5
R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098
R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000
FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot+1938db17e275e85dc328@syzkaller.appspotmail.com
Cc: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1e58252e334dc3f3756f424a157d1b7484464c40 upstream.
mwifiex_process_tdls_action_frame() without checking
the incoming tdls infomation element's vality before use it,
this may cause multi heap buffer overflows.
Fix them by putting vality check before use it.
IE is TLV struct, but ht_cap and ht_oper aren’t TLV struct.
the origin marvell driver code is wrong:
memcpy(&sta_ptr->tdls_cap.ht_oper, pos,....
memcpy((u8 *)&sta_ptr->tdls_cap.ht_capb, pos,...
Fix the bug by changing pos(the address of IE) to
pos+2 ( the address of IE value ).
Signed-off-by: qize wang <wangqize888888888@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit da72a379b2ec0bad3eb265787f7008bead0b040c upstream.
VMD subdevices are created with a PCI domain ID of 0x10000 or
higher.
These subdevices are also handled like all other PCI devices by
dmar_pci_bus_notifier().
However, when dmar_alloc_pci_notify_info() take records of such devices,
it will truncate the domain ID to a u16 value (in info->seg).
The device at (e.g.) 10000:00:02.0 is then treated by the DMAR code as if
it is 0000:00:02.0.
In the unlucky event that a real device also exists at 0000:00:02.0 and
also has a device-specific entry in the DMAR table,
dmar_insert_dev_scope() will crash on:
BUG_ON(i >= devices_cnt);
That's basically a sanity check that only one PCI device matches a
single DMAR entry; in this case we seem to have two matching devices.
Fix this by ignoring devices that have a domain number higher than
what can be looked up in the DMAR table.
This problem was carefully diagnosed by Jian-Hong Pan.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Daniel Drake <drake@endlessm.com>
Fixes: 59ce0515cdaf3 ("iommu/vt-d: Update DRHD/RMRR/ATSR device scope caches when PCI hotplug happens")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b0bb0c22c4db623f2e7b1a471596fbf1c22c6dc5 upstream.
When base address in RHSA structure doesn't match base address in
each DRHD structure, the base address in last DRHD is printed out.
This doesn't make sense when there are multiple DRHD units, fix it
by printing the buggy RHSA's base address.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@gmail.com>
Fixes: fd0c8894893cb ("intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c049b3450072b8e3998053490e025839fecfef31 upstream.
Add missing attribute validation for cthelper
to the netlink policy.
Fixes: 12f7a505331e ("netfilter: add user-space connection tracking helper infrastructure")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5cde05c61cbe13cbb3fa66d52b9ae84f7975e5e6 upstream.
Add missing attribute validation for NL80211_ATTR_OPER_CLASS
to the netlink policy.
Fixes: 1057d35ede5d ("cfg80211: introduce TDLS channel switch commands")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20200303051058.4089398-4-kuba@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0e1a1d853ecedc99da9d27f9f5c376935547a0e2 upstream.
Add missing attribute validation for critical protocol fields
to the netlink policy.
Fixes: 5de17984898c ("cfg80211: introduce critical protocol indication from user-space")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20200303051058.4089398-2-kuba@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 77a1bce84bba01f3f143d77127b72e872b573795 upstream.
intel_iommu_iova_to_phys() has a bug when it translates an IOVA for a huge
page onto its corresponding physical address. This commit fixes the bug by
accomodating the level of page entry for the IOVA and adds IOVA's lower
address to the physical address.
Cc: <stable@vger.kernel.org>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Yonghyun Hwang <yonghyun@google.com>
Fixes: 3871794642579 ("VT-d: Changes to support KVM")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 59833696442c674acbbd297772ba89e7ad8c753d upstream.
Quoting from the comment describing the WARN functions in
include/asm-generic/bug.h:
* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
* significant kernel issues that need prompt attention if they should ever
* appear at runtime.
*
* Do not use these macros when checking for invalid external inputs
The (buggy) firmware tables which the dmar code was calling WARN_TAINT
for really are invalid external inputs. They are not under the kernel's
control and the issues in them cannot be fixed by a kernel update.
So logging a backtrace, which invites bug reports to be filed about this,
is not helpful.
Some distros, e.g. Fedora, have tools watching for the kernel backtraces
logged by the WARN macros and offer the user an option to file a bug for
this when these are encountered. The WARN_TAINT in warn_invalid_dmar()
+ another iommu WARN_TAINT, addressed in another patch, have lead to over
a 100 bugs being filed this way.
This commit replaces the WARN_TAINT("...") calls, with
pr_warn(FW_BUG "...") + add_taint(TAINT_FIRMWARE_WORKAROUND, ...) calls
avoiding the backtrace and thus also avoiding bug-reports being filed
about this against the kernel.
Fixes: fd0c8894893c ("intel-iommu: Set a more specific taint flag for invalid BIOS DMAR tables")
Fixes: e625b4a95d50 ("iommu/vt-d: Parse ANDD records")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200309140138.3753-2-hdegoede@redhat.com
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1564895
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 286d3250c9d6437340203fb64938bea344729a0e upstream.
There is a race and a buffer overflow corrupting a kernel memory while
reading an EFI variable with a size more than 1024 bytes via the older
sysfs method. This happens because accessing struct efi_variable in
efivar_{attr,size,data}_read() and friends is not protected from
a concurrent access leading to a kernel memory corruption and, at best,
to a crash. The race scenario is the following:
CPU0: CPU1:
efivar_attr_read()
var->DataSize = 1024;
efivar_entry_get(... &var->DataSize)
down_interruptible(&efivars_lock)
efivar_attr_read() // same EFI var
var->DataSize = 1024;
efivar_entry_get(... &var->DataSize)
down_interruptible(&efivars_lock)
virt_efi_get_variable()
// returns EFI_BUFFER_TOO_SMALL but
// var->DataSize is set to a real
// var size more than 1024 bytes
up(&efivars_lock)
virt_efi_get_variable()
// called with var->DataSize set
// to a real var size, returns
// successfully and overwrites
// a 1024-bytes kernel buffer
up(&efivars_lock)
This can be reproduced by concurrent reading of an EFI variable which size
is more than 1024 bytes:
ts# for cpu in $(seq 0 $(nproc --ignore=1)); do ( taskset -c $cpu \
cat /sys/firmware/efi/vars/KEKDefault*/size & ) ; done
Fix this by using a local variable for a var's data buffer size so it
does not get overwritten.
Fixes: e14ab23dde12b80d ("efivars: efivar_entry API")
Reported-by: Bob Sanders <bob.sanders@hpe.com> and the LTP testsuite
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200305084041.24053-2-vdronov@redhat.com
Link: https://lore.kernel.org/r/20200308080859.21568-24-ardb@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 8d92e992a785f35d23f845206cf8c6cafbc264e0 upstream.
The default defintions use fill pattern 0x90 for padding which for ARC
generates unintended "ldh_s r12,[r0,0x20]" corresponding to opcode 0x9090
So use ".align 4" which insert a "nop_s" instruction instead.
Cc: stable@vger.kernel.org
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 342993f96ab24d5864ab1216f46c0b199c2baf8e upstream.
After commit 07721feee46b ("KVM: nVMX: Don't emulate instructions in guest
mode") Hyper-V guests on KVM stopped booting with:
kvm_nested_vmexit: rip fffff802987d6169 reason EPT_VIOLATION info1 181
info2 0 int_info 0 int_info_err 0
kvm_page_fault: address febd0000 error_code 181
kvm_emulate_insn: 0:fffff802987d6169: f3 a5
kvm_emulate_insn: 0:fffff802987d6169: f3 a5 FAIL
kvm_inj_exception: #UD (0x0)
"f3 a5" is a "rep movsw" instruction, which should not be intercepted
at all. Commit c44b4c6ab80e ("KVM: emulate: clean up initializations in
init_decode_cache") reduced the number of fields cleared by
init_decode_cache() claiming that they are being cleared elsewhere,
'intercept', however, is left uncleared if the instruction does not have
any of the "slow path" flags (NotImpl, Stack, Op3264, Sse, Mmx, CheckPerm,
NearBranch, No16 and of course Intercept itself).
Fixes: c44b4c6ab80e ("KVM: emulate: clean up initializations in init_decode_cache")
Fixes: 07721feee46b ("KVM: nVMX: Don't emulate instructions in guest mode")
Cc: stable@vger.kernel.org
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 21039132650281de06a169cbe8a0f7e5c578fd8b upstream.
with the way fs/namei.c:do_last() had been done, ->atomic_open()
instances needed to recognize the case when existing file got
found with O_EXCL|O_CREAT, either by falling back to finish_no_open()
or failing themselves. gfs2 one didn't.
Fixes: 6d4ade986f9c (GFS2: Add atomic_open support)
Cc: stable@kernel.org # v3.11
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit d785476c608c621b345dd9396e8b21e90375cb0e upstream.
Variable grph_obj_type is being assigned twice, one of these is
redundant so remove it.
Addresses-Coverity: ("Evaluation order violation")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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add_taint
commit 81ee85d0462410de8eeeec1b9761941fd6ed8c7b upstream.
Quoting from the comment describing the WARN functions in
include/asm-generic/bug.h:
* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
* significant kernel issues that need prompt attention if they should ever
* appear at runtime.
*
* Do not use these macros when checking for invalid external inputs
The (buggy) firmware tables which the dmar code was calling WARN_TAINT
for really are invalid external inputs. They are not under the kernel's
control and the issues in them cannot be fixed by a kernel update.
So logging a backtrace, which invites bug reports to be filed about this,
is not helpful.
Fixes: 556ab45f9a77 ("ioat2: catch and recover from broken vtd configurations v6")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20200309182510.373875-1-hdegoede@redhat.com
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=701847
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 7e6dc03eeb023e18427a373522f1d247b916a641 ]
Add missing attribute validation for TCA_FQ_ORPHAN_MASK
to the netlink policy.
Fixes: 06eb395fa985 ("pkt_sched: fq: better control of DDOS traffic")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b7469e83d2add567e4e0b063963db185f3167cea upstream.
Similar to commit 38f88c454042 ("bonding/alb: properly access headers
in bond_alb_xmit()"), we need to make sure arp header was pulled
in skb->head before blindly accessing it in rlb_arp_xmit().
Remove arp_pkt() private helper, since it is more readable/obvious
to have the following construct back to back :
if (!pskb_network_may_pull(skb, sizeof(*arp)))
return NULL;
arp = (struct arp_pkt *)skb_network_header(skb);
syzbot reported :
BUG: KMSAN: uninit-value in bond_slave_has_mac_rx include/net/bonding.h:704 [inline]
BUG: KMSAN: uninit-value in rlb_arp_xmit drivers/net/bonding/bond_alb.c:662 [inline]
BUG: KMSAN: uninit-value in bond_alb_xmit+0x575/0x25e0 drivers/net/bonding/bond_alb.c:1477
CPU: 0 PID: 12743 Comm: syz-executor.4 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
bond_slave_has_mac_rx include/net/bonding.h:704 [inline]
rlb_arp_xmit drivers/net/bonding/bond_alb.c:662 [inline]
bond_alb_xmit+0x575/0x25e0 drivers/net/bonding/bond_alb.c:1477
__bond_start_xmit drivers/net/bonding/bond_main.c:4257 [inline]
bond_start_xmit+0x85d/0x2f70 drivers/net/bonding/bond_main.c:4282
__netdev_start_xmit include/linux/netdevice.h:4524 [inline]
netdev_start_xmit include/linux/netdevice.h:4538 [inline]
xmit_one net/core/dev.c:3470 [inline]
dev_hard_start_xmit+0x531/0xab0 net/core/dev.c:3486
__dev_queue_xmit+0x37de/0x4220 net/core/dev.c:4063
dev_queue_xmit+0x4b/0x60 net/core/dev.c:4096
packet_snd net/packet/af_packet.c:2967 [inline]
packet_sendmsg+0x8347/0x93b0 net/packet/af_packet.c:2992
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
__sys_sendto+0xc1b/0xc50 net/socket.c:1998
__do_sys_sendto net/socket.c:2010 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:2006
__x64_sys_sendto+0x6e/0x90 net/socket.c:2006
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c479
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc77ffbbc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc77ffbc6d4 RCX: 000000000045c479
RDX: 000000000000000e RSI: 00000000200004c0 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a04 R14: 00000000004cc7b0 R15: 000000000076bf2c
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
slab_alloc_node mm/slub.c:2793 [inline]
__kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1051 [inline]
alloc_skb_with_frags+0x18c/0xa70 net/core/skbuff.c:5766
sock_alloc_send_pskb+0xada/0xc60 net/core/sock.c:2242
packet_alloc_skb net/packet/af_packet.c:2815 [inline]
packet_snd net/packet/af_packet.c:2910 [inline]
packet_sendmsg+0x66a0/0x93b0 net/packet/af_packet.c:2992
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg net/socket.c:672 [inline]
__sys_sendto+0xc1b/0xc50 net/socket.c:1998
__do_sys_sendto net/socket.c:2010 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:2006
__x64_sys_sendto+0x6e/0x90 net/socket.c:2006
do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 110a40dfb708fe940a3f3704d470e431c368d256 ]
Before accessing various fields in IPV4 network header
and TCP header, make sure the packet :
- Has IP version 4 (ip->version == 4)
- Has not a silly network length (ip->ihl >= 5)
- Is big enough to hold network and transport headers
- Has not a silly TCP header size (th->doff >= sizeof(struct tcphdr) / 4)
syzbot reported :
BUG: KMSAN: uninit-value in slhc_compress+0x5b9/0x2e60 drivers/net/slip/slhc.c:270
CPU: 0 PID: 11728 Comm: syz-executor231 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1c9/0x220 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
slhc_compress+0x5b9/0x2e60 drivers/net/slip/slhc.c:270
ppp_send_frame drivers/net/ppp/ppp_generic.c:1637 [inline]
__ppp_xmit_process+0x1902/0x2970 drivers/net/ppp/ppp_generic.c:1495
ppp_xmit_process+0x147/0x2f0 drivers/net/ppp/ppp_generic.c:1516
ppp_write+0x6bb/0x790 drivers/net/ppp/ppp_generic.c:512
do_loop_readv_writev fs/read_write.c:717 [inline]
do_iter_write+0x812/0xdc0 fs/read_write.c:1000
compat_writev+0x2df/0x5a0 fs/read_write.c:1351
do_compat_pwritev64 fs/read_write.c:1400 [inline]
__do_compat_sys_pwritev fs/read_write.c:1420 [inline]
__se_compat_sys_pwritev fs/read_write.c:1414 [inline]
__ia32_compat_sys_pwritev+0x349/0x3f0 fs/read_write.c:1414
do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410
entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f7cd99
Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000ffdb84ac EFLAGS: 00000217 ORIG_RAX: 000000000000014e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200001c0
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000040047459 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127
kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:82
slab_alloc_node mm/slub.c:2793 [inline]
__kmalloc_node_track_caller+0xb40/0x1200 mm/slub.c:4401
__kmalloc_reserve net/core/skbuff.c:142 [inline]
__alloc_skb+0x2fd/0xac0 net/core/skbuff.c:210
alloc_skb include/linux/skbuff.h:1051 [inline]
ppp_write+0x115/0x790 drivers/net/ppp/ppp_generic.c:500
do_loop_readv_writev fs/read_write.c:717 [inline]
do_iter_write+0x812/0xdc0 fs/read_write.c:1000
compat_writev+0x2df/0x5a0 fs/read_write.c:1351
do_compat_pwritev64 fs/read_write.c:1400 [inline]
__do_compat_sys_pwritev fs/read_write.c:1420 [inline]
__se_compat_sys_pwritev fs/read_write.c:1414 [inline]
__ia32_compat_sys_pwritev+0x349/0x3f0 fs/read_write.c:1414
do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline]
do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410
entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139
Fixes: b5451d783ade ("slip: Move the SLIP drivers")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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[ Upstream commit ab14961d10d02d20767612c78ce148f6eb85bd58 ]
fec_enet_set_coalesce() validates the previously set params
and if they are within range proceeds to apply the new ones.
The new ones, however, are not validated. This seems backwards,
probably a copy-paste error?
Compile tested only.
Fixes: d851b47b22fc ("net: fec: add interrupt coalescence feature support")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit ce9a4186f9ac475c415ffd20348176a4ea366670 ]
The Rx bound multicast packets are deferred to a workqueue and
macvlan can also suffer from the same attack that was discovered
by Syzbot for IPvlan. This solution is not as effective as in
IPvlan. IPvlan defers all (Tx and Rx) multicast packet processing
to a workqueue while macvlan does this way only for the Rx. This
fix should address the Rx codition to certain extent.
Tx is still suseptible. Tx multicast processing happens when
.ndo_start_xmit is called, hence we cannot add cond_resched().
However, it's not that severe since the user which is generating
/ flooding will be affected the most.
Fixes: 412ca1550cbe ("macvlan: Move broadcasts into a work queue")
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit ad8192767c9f9cf97da57b9ffcea70fb100febef ]
IPvlan in L3 mode discards outbound multicast packets but performs
the check before ensuring the ether-header is set or not. This is
an error that Eric found through code browsing.
Fixes: 2ad7bf363841 (“ipvlan: Initial check-in of the IPVLAN driver.”)
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit afe207d80a61e4d6e7cfa0611a4af46d0ba95628 ]
Commit e18b353f102e ("ipvlan: add cond_resched_rcu() while
processing muticast backlog") added a cond_resched_rcu() in a loop
using rcu protection to iterate over slaves.
This is breaking rcu rules, so lets instead use cond_resched()
at a point we can reschedule
Fixes: e18b353f102e ("ipvlan: add cond_resched_rcu() while processing muticast backlog")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit cccc200fcaf04cff4342036a72e51d6adf6c98c1 upstream.
Currently, if IPv6 is enabled on top of an ipvlan device in l3
mode, the following warning message:
Dropped {multi|broad}cast of type= [86dd]
is emitted every time that a RS is generated and dmseg is soon
filled with irrelevant messages. Replace pr_warn with pr_debug,
to preserve debuggability, without scaring the sysadmin.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 63aae7b17344d4b08a7d05cb07044de4c0f9dcc6 ]
There is a problem when ipvlan slaves are created on a master device that
is a vmxnet3 device (ipvlan in VMware guests). The vmxnet3 driver does not
support unicast address filtering. When an ipvlan device is brought up in
ipvlan_open(), the ipvlan driver calls dev_uc_add() to add the hardware
address of the vmxnet3 master device to the unicast address list of the
master device, phy_dev->uc. This inevitably leads to the vmxnet3 master
device being forced into promiscuous mode by __dev_set_rx_mode().
Promiscuous mode is switched on the master despite the fact that there is
still only one hardware address that the master device should use for
filtering in order for the ipvlan device to be able to receive packets.
The comment above struct net_device describes the uc_promisc member as a
"counter, that indicates, that promiscuous mode has been enabled due to
the need to listen to additional unicast addresses in a device that does
not implement ndo_set_rx_mode()". Moreover, the design of ipvlan
guarantees that only the hardware address of a master device,
phy_dev->dev_addr, will be used to transmit and receive all packets from
its ipvlan slaves. Thus, the unicast address list of the master device
should not be modified by ipvlan_open() and ipvlan_stop() in order to make
ipvlan a workable option on masters that do not support unicast address
filtering.
Fixes: 2ad7bf3638411 ("ipvlan: Initial check-in of the IPVLAN driver")
Reported-by: Per Sundstrom <per.sundstrom@redqube.se>
Signed-off-by: Jiri Wiesner <jwiesner@suse.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit e18b353f102e371580f3f01dd47567a25acc3c1d ]
If there are substantial number of slaves created as simulated by
Syzbot, the backlog processing could take much longer and result
into the issue found in the Syzbot report.
INFO: rcu_sched detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=5049, c=5048, q=752)
All QSes seen, last rcu_sched kthread activity 10502 (4294965563-4294955061), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.1 R running task on cpu 1 10984 11210 3866 0x30020008 179034491270
Call Trace:
<IRQ>
[<ffffffff81497163>] _sched_show_task kernel/sched/core.c:8063 [inline]
[<ffffffff81497163>] _sched_show_task.cold+0x2fd/0x392 kernel/sched/core.c:8030
[<ffffffff8146a91b>] sched_show_task+0xb/0x10 kernel/sched/core.c:8073
[<ffffffff815c931b>] print_other_cpu_stall kernel/rcu/tree.c:1577 [inline]
[<ffffffff815c931b>] check_cpu_stall kernel/rcu/tree.c:1695 [inline]
[<ffffffff815c931b>] __rcu_pending kernel/rcu/tree.c:3478 [inline]
[<ffffffff815c931b>] rcu_pending kernel/rcu/tree.c:3540 [inline]
[<ffffffff815c931b>] rcu_check_callbacks.cold+0xbb4/0xc29 kernel/rcu/tree.c:2876
[<ffffffff815e3962>] update_process_times+0x32/0x80 kernel/time/timer.c:1635
[<ffffffff816164f0>] tick_sched_handle+0xa0/0x180 kernel/time/tick-sched.c:161
[<ffffffff81616ae4>] tick_sched_timer+0x44/0x130 kernel/time/tick-sched.c:1193
[<ffffffff815e75f7>] __run_hrtimer kernel/time/hrtimer.c:1393 [inline]
[<ffffffff815e75f7>] __hrtimer_run_queues+0x307/0xd90 kernel/time/hrtimer.c:1455
[<ffffffff815e90ea>] hrtimer_interrupt+0x2ea/0x730 kernel/time/hrtimer.c:1513
[<ffffffff844050f4>] local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1031 [inline]
[<ffffffff844050f4>] smp_apic_timer_interrupt+0x144/0x5e0 arch/x86/kernel/apic/apic.c:1056
[<ffffffff84401cbe>] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:778
RIP: 0010:do_raw_read_lock+0x22/0x80 kernel/locking/spinlock_debug.c:153
RSP: 0018:ffff8801dad07ab8 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff12
RAX: 0000000000000000 RBX: ffff8801c4135680 RCX: 0000000000000000
RDX: 1ffff10038826afe RSI: ffff88019d816bb8 RDI: ffff8801c41357f0
RBP: ffff8801dad07ac0 R08: 0000000000004b15 R09: 0000000000310273
R10: ffff88019d816bb8 R11: 0000000000000001 R12: ffff8801c41357e8
R13: 0000000000000000 R14: ffff8801cfb19850 R15: ffff8801cfb198b0
[<ffffffff8101460e>] __raw_read_lock_bh include/linux/rwlock_api_smp.h:177 [inline]
[<ffffffff8101460e>] _raw_read_lock_bh+0x3e/0x50 kernel/locking/spinlock.c:240
[<ffffffff840d78ca>] ipv6_chk_mcast_addr+0x11a/0x6f0 net/ipv6/mcast.c:1006
[<ffffffff84023439>] ip6_mc_input+0x319/0x8e0 net/ipv6/ip6_input.c:482
[<ffffffff840211c8>] dst_input include/net/dst.h:449 [inline]
[<ffffffff840211c8>] ip6_rcv_finish+0x408/0x610 net/ipv6/ip6_input.c:78
[<ffffffff840214de>] NF_HOOK include/linux/netfilter.h:292 [inline]
[<ffffffff840214de>] NF_HOOK include/linux/netfilter.h:286 [inline]
[<ffffffff840214de>] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:278
[<ffffffff83a29efa>] __netif_receive_skb_one_core+0x12a/0x1f0 net/core/dev.c:5303
[<ffffffff83a2a15c>] __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:5417
[<ffffffff83a2f536>] process_backlog+0x216/0x6c0 net/core/dev.c:6243
[<ffffffff83a30d1b>] napi_poll net/core/dev.c:6680 [inline]
[<ffffffff83a30d1b>] net_rx_action+0x47b/0xfb0 net/core/dev.c:6748
[<ffffffff846002c8>] __do_softirq+0x2c8/0x99a kernel/softirq.c:317
[<ffffffff813e656a>] invoke_softirq kernel/softirq.c:399 [inline]
[<ffffffff813e656a>] irq_exit+0x16a/0x1a0 kernel/softirq.c:439
[<ffffffff84405115>] exiting_irq arch/x86/include/asm/apic.h:561 [inline]
[<ffffffff84405115>] smp_apic_timer_interrupt+0x165/0x5e0 arch/x86/kernel/apic/apic.c:1058
[<ffffffff84401cbe>] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:778
</IRQ>
RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:102
RSP: 0018:ffff880196033bd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12
RAX: ffff88019d8161c0 RBX: 00000000ffffffff RCX: ffffc90003501000
RDX: 0000000000000002 RSI: ffffffff816236d1 RDI: 0000000000000005
RBP: ffff880196033bd8 R08: ffff88019d8161c0 R09: 0000000000000000
R10: 1ffff10032c067f0 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000080 R14: 0000000000000000 R15: 0000000000000000
[<ffffffff816236d1>] do_futex+0x151/0x1d50 kernel/futex.c:3548
[<ffffffff816260f0>] C_SYSC_futex kernel/futex_compat.c:201 [inline]
[<ffffffff816260f0>] compat_SyS_futex+0x270/0x3b0 kernel/futex_compat.c:175
[<ffffffff8101da17>] do_syscall_32_irqs_on arch/x86/entry/common.c:353 [inline]
[<ffffffff8101da17>] do_fast_syscall_32+0x357/0xe1c arch/x86/entry/common.c:415
[<ffffffff84401a9b>] entry_SYSENTER_compat+0x8b/0x9d arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f23c69
RSP: 002b:00000000f5d1f12c EFLAGS: 00000282 ORIG_RAX: 00000000000000f0
RAX: ffffffffffffffda RBX: 000000000816af88 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000816af8c
RBP: 00000000f5d1f228 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_sched kthread starved for 10502 jiffies! g5049 c5048 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched R running task on cpu 1 13048 8 2 0x90000000 179099587640
Call Trace:
[<ffffffff8147321f>] context_switch+0x60f/0xa60 kernel/sched/core.c:3209
[<ffffffff8100095a>] __schedule+0x5aa/0x1da0 kernel/sched/core.c:3934
[<ffffffff810021df>] schedule+0x8f/0x1b0 kernel/sched/core.c:4011
[<ffffffff8101116d>] schedule_timeout+0x50d/0xee0 kernel/time/timer.c:1803
[<ffffffff815c13f1>] rcu_gp_kthread+0xda1/0x3b50 kernel/rcu/tree.c:2327
[<ffffffff8144b318>] kthread+0x348/0x420 kernel/kthread.c:246
[<ffffffff84400266>] ret_from_fork+0x56/0x70 arch/x86/entry/entry_64.S:393
Fixes: ba35f8588f47 (“ipvlan: Defer multicast / broadcast processing to a work-queue”)
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 6ba3da446551f2150fadbf8c7788edcb977683d3 ]
Add missing attribute validation for vendor subcommand attributes
to the netlink policy.
Fixes: 9e58095f9660 ("NFC: netlink: Implement vendor command support")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 361d23e41ca6e504033f7e66a03b95788377caae ]
Add missing attribute validation for NFC_ATTR_SE_INDEX
to the netlink policy.
Fixes: 5ce3f32b5264 ("NFC: netlink: SE API implementation")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 669fcd7795900cd1880237cbbb57a7db66cb9ac8 ]
Add missing attribute validation for TEAM_ATTR_OPTION_ARRAY_INDEX
to the netlink policy.
Fixes: b13033262d24 ("team: introduce array options")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit dd25cb272ccce4db67dc8509278229099e4f5e99 ]
Add missing attribute validation for TEAM_ATTR_OPTION_PORT_IFINDEX
to the netlink policy.
Fixes: 80f7c6683fe0 ("team: add support for per-port options")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit b60673c4c418bef7550d02faf53c34fbfeb366bf ]
Add missing attribute type validation for IEEE802154_ATTR_DEV_TYPE
to the netlink policy.
Fixes: 90c049b2c6ae ("ieee802154: interface type to be added")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 9322cd7c4af2ccc7fe7c5f01adb53f4f77949e92 ]
Add missing attribute validation for several u8 types.
Fixes: 2c21d11518b6 ("net: add NL802154 interface for configuration of 802.15.4 devices")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit 4c16d64ea04056f1b1b324ab6916019f6a064114 ]
Add missing netlink policy entry for FRA_TUN_ID.
Fixes: e7030878fc84 ("fib: Add fib rule match on tunnel id")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit a9b952d267e59a3b405e644930f46d252cea7122 ]
MTU changes may affect the number of IRQs so we must call
bnxt_close_nic()/bnxt_open_nic() with the irq_re_init parameter
set to true. The reason is that a larger MTU may require
aggregation rings not needed with smaller MTU. We may not be
able to allocate the required number of aggregation rings and
so we reduce the number of channels which will change the number
of IRQs. Without this patch, it may crash eventually in
pci_disable_msix() when the IRQs are not properly unwound.
Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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[ Upstream commit a3aefbfe45751bf7b338c181b97608e276b5bb73 ]
This is similar to commit 674d9de02aa7 ("NFC: Fix possible memory
corruption when handling SHDLC I-Frame commands") and commit d7ee81ad09f0
("NFC: nci: Add some bounds checking in nci_hci_cmd_received()") which
added range checks on "pipe".
The "pipe" variable comes skb->data[0] in nfc_hci_msg_rx_work().
It's in the 0-255 range. We're using it as the array index into the
hdev->pipes[] array which has NFC_HCI_MAX_PIPES (128) members.
Fixes: 118278f20aa8 ("NFC: hci: Add pipes table to reference them with a tuple {gate, host}")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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