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Cong Wang edf070a0fb hsr: fix a NULL pointer deref in hsr_dev_xmit() 
hsr_port_get_hsr() could return NULL and kernel
could crash:

 BUG: kernel NULL pointer dereference, address: 0000000000000010
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 8000000074b84067 P4D 8000000074b84067 PUD 7057d067 PMD 0
 Oops: 0000 [#1] SMP PTI
 CPU: 0 PID: 754 Comm: a.out Not tainted 5.2.0-rc6+ #718
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-2.fc30 04/01/2014
 RIP: 0010:hsr_dev_xmit+0x20/0x31
 Code: 48 8b 1b eb e0 5b 5d 41 5c c3 66 66 66 66 90 55 48 89 fd 48 8d be 40 0b 00 00 be 04 00 00 00 e8 ee f2 ff ff 48 89 ef 48 89 c6 <48> 8b 40 10 48 89 45 10 e8 6c 1b 00 00 31 c0 5d c3 66 66 66 66 90
 RSP: 0018:ffffb5b400003c48 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: ffff9821b4509a88 RCX: 0000000000000000
 RDX: ffff9821b4509a88 RSI: 0000000000000000 RDI: ffff9821bc3fc7c0
 RBP: ffff9821bc3fc7c0 R08: 0000000000000000 R09: 00000000000c2019
 R10: 0000000000000000 R11: 0000000000000002 R12: ffff9821bc3fc7c0
 R13: ffff9821b4509a88 R14: 0000000000000000 R15: 000000000000006e
 FS:  00007fee112a1800(0000) GS:ffff9821bd800000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000010 CR3: 000000006e9ce000 CR4: 00000000000406f0
 Call Trace:
  <IRQ>
  netdev_start_xmit+0x1b/0x38
  dev_hard_start_xmit+0x121/0x21e
  ? validate_xmit_skb.isra.0+0x19/0x1e3
  __dev_queue_xmit+0x74c/0x823
  ? lockdep_hardirqs_on+0x12b/0x17d
  ip6_finish_output2+0x3d3/0x42c
  ? ip6_mtu+0x55/0x5c
  ? mld_sendpack+0x191/0x229
  mld_sendpack+0x191/0x229
  mld_ifc_timer_expire+0x1f7/0x230
  ? mld_dad_timer_expire+0x58/0x58
  call_timer_fn+0x12e/0x273
  __run_timers.part.0+0x174/0x1b5
  ? mld_dad_timer_expire+0x58/0x58
  ? sched_clock_cpu+0x10/0xad
  ? mark_lock+0x26/0x1f2
  ? __lock_is_held+0x40/0x71
  run_timer_softirq+0x26/0x48
  __do_softirq+0x1af/0x392
  irq_exit+0x53/0xa2
  smp_apic_timer_interrupt+0x1c4/0x1d9
  apic_timer_interrupt+0xf/0x20
  </IRQ>

Cc: Arvid Brodin <arvid.brodin@alten.se>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2019-07-05 15:22:27 -07:00
..
6lowpan treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
9p treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188 2019-05-30 11:29:21 -07:00
802 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
8021q treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
appletalk treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
atm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ax25 ax25: fix inconsistent lock state in ax25_destroy_timer 2019-06-16 14:22:37 -07:00
batman-adv batman-adv: Fix duplicated OGMs on NETDEV_UP 2019-06-02 13:33:48 +02:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-28 08:24:37 +08:00
bpf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206 2019-05-30 11:29:53 -07:00
bpfilter treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
bridge net: bridge: stp: don't cache eth dest pointer before skb pull 2019-07-02 11:53:03 -07:00
caif treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
can can: purge socket error queue on sock destruct 2019-06-07 23:03:54 +02:00
ceph treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 268 2019-06-05 17:30:29 +02:00
core Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2019-07-03 12:09:00 -07:00
dcb treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
dccp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
decnet treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 53 2019-05-24 17:36:42 +02:00
dns_resolver treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
dsa Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-06-07 09:29:14 -07:00
ethernet treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
hsr hsr: fix a NULL pointer deref in hsr_dev_xmit() 2019-07-05 15:22:27 -07:00
ieee802154 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
ife treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
ipv4 net: don't warn in inet diag when IPV6 is disabled 2019-07-03 11:26:35 -07:00
ipv6 ipv6: fix neighbour resolution with raw socket 2019-06-26 13:26:08 -07:00
iucv net/af_iucv: always register net_device notifier 2019-06-19 16:26:33 -04:00
kcm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
key Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 2019-07-05 14:58:22 -07:00
l2tp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
l3mdev treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
lapb lapb: fixed leak of control-blocks. 2019-06-16 20:44:20 -07:00
llc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 281 2019-06-05 17:36:36 +02:00
mac80211 SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
mac802154 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
mpls mpls: fix af_mpls dependencies for real 2019-06-12 09:42:34 -07:00
ncsi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
netfilter net: make skb_dst_force return true when dst is refcounted 2019-06-29 11:01:35 -07:00
netlabel treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
netlink treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
netrom netrom: fix a memory leak in nr_rx_frame() 2019-07-01 19:00:52 -07:00
nfc SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
nsh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
openvswitch net: openvswitch: fix csum updates for MPLS actions 2019-06-30 18:45:12 -07:00
packet af_packet: Block execution of tasks waiting for transmit to complete in AF_PACKET 2019-06-26 19:38:29 -07:00
phonet treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336 2019-06-05 17:37:07 +02:00
psample treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
qrtr treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
rds net: rds: fix memory leak in rds_ib_flush_mr_pool 2019-06-06 10:32:16 -07:00
rfkill treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
rose treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
rxrpc rxrpc: Fix send on a connected, but unbound socket 2019-07-02 12:15:21 -07:00
sched idr: introduce idr_for_each_entry_continue_ul() 2019-07-01 19:15:46 -07:00
sctp sctp: count data bundling sack chunk for outctrlchunks 2019-07-03 11:41:24 -07:00
smc net/smc: Fix error path in smc_init 2019-06-26 10:10:16 -07:00
strparser treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sunrpc SUNRPC: Fix a credential refcount leak 2019-06-21 14:45:09 -04:00
switchdev treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
tipc tipc: check msg->req data len in tipc_nl_compat_bearer_disable 2019-06-24 10:03:59 -07:00
tls net/tls: make sure offload also gets the keys wiped 2019-07-01 19:22:36 -07:00
unix treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
vmw_vsock vsock/virtio: fix flush of works during the .remove() 2019-07-01 19:09:07 -07:00
wimax treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 268 2019-06-05 17:30:29 +02:00
wireless SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
x25 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 41 2019-05-24 17:27:12 +02:00
xdp xdp: fix hang while unregistering device bound to xdp socket 2019-07-03 15:10:55 +02:00
xfrm Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec 2019-07-05 14:58:22 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile net: split out functions related to registering inflight socket files 2019-02-28 08:24:23 -07:00
compat.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
socket.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sysctl_net.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00