syzbot

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5838 Comm: syz-executor629 Not tainted 4.9.122-g54068d6 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801d03e9800 task.stack: ffff8801cc6e0000
RIP: 0010:[<ffffffff811862e6>]  [<ffffffff811862e6>] get_work_pool+0xf6/0x1e0 kernel/workqueue.c:716
RSP: 0018:ffff8801cc6e7418  EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 00000000fffffe00 RCX: 0000000000000000
RDX: 000000001fffffc0 RSI: ffffffff811862ce RDI: 0000000000000046
RBP: ffff8801cc6e7430 R08: 0000000000000096 R09: 0000000000000001
R10: 0000000000000000 R11: 1ffff1003a07d41d R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8801d9984500 R15: ffffffff84b5af70
FS:  0000000001e27880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffea48e0a8c CR3: 00000001d06db000 CR4: 00000000001606f0
Stack:
 ffff8801db226000 dffffc0000000000 0000000000000000 ffff8801cc6e74a8
 ffffffff8118a4ac ffff8801d03ea0c0 0000000600000007 ffff8801d03e9800
 fffffbfff098c050 0000000000000029 ffff8801d9984680 0000004000000000
Call Trace:
 [<ffffffff8118a4ac>] __queue_work+0x14c/0xf10 kernel/workqueue.c:1401
 [<ffffffff8118beb7>] queue_work_on+0x97/0xa0 kernel/workqueue.c:1486
 [<ffffffff834fdd98>] queue_work include/linux/workqueue.h:477 [inline]
 [<ffffffff834fdd98>] schedule_work include/linux/workqueue.h:535 [inline]
 [<ffffffff834fdd98>] xfrm_policy_insert+0xa78/0xf20 net/xfrm/xfrm_policy.c:830
 [<ffffffff8352eed8>] xfrm_add_policy+0x248/0x4f0 net/xfrm/xfrm_user.c:1565
 [<ffffffff8352b647>] xfrm_user_rcv_msg+0x3c7/0x6b0 net/xfrm/xfrm_user.c:2531
 [<ffffffff831d8615>] netlink_rcv_skb+0x145/0x370 net/netlink/af_netlink.c:2365
 [<ffffffff835281ef>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2539
 [<ffffffff831d71c8>] netlink_unicast_kernel net/netlink/af_netlink.c:1285 [inline]
 [<ffffffff831d71c8>] netlink_unicast+0x4d8/0x6f0 net/netlink/af_netlink.c:1311
 [<ffffffff831d7b75>] netlink_sendmsg+0x795/0xc30 net/netlink/af_netlink.c:1859
 [<ffffffff8301cfcc>] sock_sendmsg_nosec net/socket.c:636 [inline]
 [<ffffffff8301cfcc>] sock_sendmsg+0xcc/0x110 net/socket.c:646
 [<ffffffff8301ea6c>] ___sys_sendmsg+0x6fc/0x840 net/socket.c:1970
 [<ffffffff83020ad9>] __sys_sendmsg+0xd9/0x190 net/socket.c:2004
 [<ffffffff83020bbd>] SYSC_sendmsg net/socket.c:2015 [inline]
 [<ffffffff83020bbd>] SyS_sendmsg+0x2d/0x50 net/socket.c:2011
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff83a00cd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: b1 aa 1d 00 48 89 d8 5b 41 5c 41 5d 5d c3 e8 a2 aa 1d 00 48 81 e3 00 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 00 00 00 48 8b 1b e8 78 aa 1d 00 48 89 d8 
RIP  [<ffffffff811862e6>] get_work_pool+0xf6/0x1e0 kernel/workqueue.c:716
 RSP <ffff8801cc6e7418>
---[ end trace 58f8fa4901d30e69 ]---