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
Modules linked in:
CPU: 0 PID: 64 Comm: kworker/u4:1 Not tainted 4.9.135+ #116
Workqueue: netns cleanup_net
task: ffff8801d7854740 task.stack: ffff8801d79a0000
RIP: 0010:[<ffffffff81125ac6>]  [<ffffffff81125ac6>] get_work_pool+0xf6/0x1d0 kernel/workqueue.c:716
RSP: 0018:ffff8801d79a78f8  EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000001ffffffe00 RCX: ffffed003af0a9fd
RDX: 00000003ffffffc0 RSI: ffffffff81125aae RDI: 0000000000000046
RBP: ffff8801d79a7910 R08: ffff8801d7854ff0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8801ab78f2b0
R13: ffff8801ab78db80 R14: ffff8801ab78f2d0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdf0bd8fc8 CR3: 00000001ad401000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 dffffc0000000000 ffff8801ab78f2b0 ffff8801ab78db80 ffff8801d79a7a50
 ffffffff8112c62c ffffffff8112c550 ffff8801d79a7948 1ffff1003af34f29
 000000000001cec0 0000000000000000 0000000041b58ab3 ffffffff82e2bdc4
Call Trace:
 [<ffffffff8112c62c>] start_flush_work kernel/workqueue.c:2785 [inline]
 [<ffffffff8112c62c>] flush_work+0xdc/0x6c0 kernel/workqueue.c:2845
 [<ffffffff82638e3c>] xfrm_policy_fini+0x2c/0x2f0 net/xfrm/xfrm_policy.c:3051
 [<ffffffff82639125>] xfrm_net_exit+0x25/0x30 net/xfrm/xfrm_policy.c:3118
 [<ffffffff822e3a10>] ops_exit_list.isra.0+0xb0/0x160 net/core/net_namespace.c:136
 [<ffffffff822e6772>] cleanup_net+0x3f2/0x8b0 net/core/net_namespace.c:473
 [<ffffffff81130d61>] process_one_work+0x831/0x1530 kernel/workqueue.c:2092
 [<ffffffff81131b36>] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226
 [<ffffffff811428dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82816d5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: 41 5a 1f 00 48 89 d8 5b 41 5c 41 5d 5d c3 e8 32 5a 1f 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 bc 00 00 00 48 8b 1b e8 08 5a 1f 00 48 89 d8 
RIP  [<ffffffff81125ac6>] get_work_pool+0xf6/0x1d0 kernel/workqueue.c:716
 RSP <ffff8801d79a78f8>
---[ end trace 6b73becb058feded ]---