netlink: 4 bytes leftover after parsing attributes in process `syz-executor2'. 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: 1 PID: 4086 Comm: kworker/u4:4 Not tainted 4.9.119-g92e8704 #74 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net task: ffff8801a4d28000 task.stack: ffff8801a4d30000 RIP: 0010:[] [] get_work_pool+0xf6/0x1e0 kernel/workqueue.c:716 RSP: 0018:ffff8801a4d37908 EFLAGS: 00010006 RAX: dffffc0000000000 RBX: 0000001ffffffe00 RCX: 0000000000000000 RDX: 00000003ffffffc0 RSI: ffffffff8118402e RDI: 0000000000000046 RBP: ffff8801a4d37920 R08: ffff8801a4d28960 R09: 0000000000000001 R10: 0000000000000000 R11: 1ffff100349a5127 R12: ffff8801a8754770 R13: ffff8801a4d37bd8 R14: ffff8801a8754790 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ec52c1000 CR3: 00000001b7bd9000 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: dffffc0000000000 ffff8801a8754770 ffff8801a4d37bd8 ffff8801a4d37a60 ffffffff811894dc ffffffff81189400 ffff8801a4d288c8 1ffff100349a6f2b ffff8801a4d28000 dffffc0000000000 0000000041b58ab3 ffffffff843bcb17 Call Trace: [] start_flush_work kernel/workqueue.c:2785 [inline] [] flush_work+0xdc/0x6c0 kernel/workqueue.c:2845 [] xfrm_policy_fini+0x2e/0x310 net/xfrm/xfrm_policy.c:2998 [] xfrm_net_exit+0x25/0x30 net/xfrm/xfrm_policy.c:3065 [] ops_exit_list.isra.6+0xb0/0x160 net/core/net_namespace.c:136 [] cleanup_net+0x321/0x630 net/core/net_namespace.c:473 [] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092 [] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 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 [] get_work_pool+0xf6/0x1e0 kernel/workqueue.c:716 RSP ---[ end trace 056a4acaba36b3df ]---