------------[ cut here ]------------
conntrack cleanup blocked for 60s
WARNING: net/netfilter/nf_conntrack_core.c:2512 at nf_conntrack_cleanup_net_list+0x234/0x340 net/netfilter/nf_conntrack_core.c:2511, CPU#1: kworker/u8:17/6117
Modules linked in:
CPU: 1 UID: 0 PID: 6117 Comm: kworker/u8:17 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: netns cleanup_net
RIP: 0010:nf_conntrack_cleanup_net_list+0x234/0x340 net/netfilter/nf_conntrack_core.c:2511
Code: 08 48 89 df e8 6d 7b a3 f8 4c 8b 3b 49 39 df 74 69 e8 90 18 3d f8 45 31 e4 e9 8e fe ff ff e8 83 18 3d f8 48 8d 3d 5c 31 0c 06 <67> 48 0f b9 3a eb c0 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c cd fe ff
RSP: 0018:ffffc9000b547870 EFLAGS: 00010293
RAX: ffffffff89849ecd RBX: ffffc9000b547a00 RCX: ffff88802a049e80
RDX: 0000000000000000 RSI: fffffffffffffffe RDI: ffffffff8f90d030
RBP: 0000000000000001 R08: ffff88805693d003 R09: 1ffff1100ad27a00
R10: dffffc0000000000 R11: ffffed100ad27a01 R12: 0000000000000001
R13: dffffc0000000000 R14: 00000001000112a2 R15: 00000001000112a4
FS: 0000000000000000(0000) GS:ffff888125f31000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30debff8 CR3: 000000007946a000 CR4: 00000000003526f0
Call Trace:
<TASK>
ops_exit_list net/core/net_namespace.c:205 [inline]
ops_undo_list+0x525/0x990 net/core/net_namespace.c:252
cleanup_net+0x4d8/0x7a0 net/core/net_namespace.c:696
process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279
process_scheduled_works kernel/workqueue.c:3362 [inline]
worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
</TASK>
----------------
Code disassembly (best guess):
0: 08 48 89 or %cl,-0x77(%rax)
3: df e8 fucomip %st(0),%st
5: 6d insl (%dx),%es:(%rdi)
6: 7b a3 jnp 0xffffffab
8: f8 clc
9: 4c 8b 3b mov (%rbx),%r15
c: 49 39 df cmp %rbx,%r15
f: 74 69 je 0x7a
11: e8 90 18 3d f8 call 0xf83d18a6
16: 45 31 e4 xor %r12d,%r12d
19: e9 8e fe ff ff jmp 0xfffffeac
1e: e8 83 18 3d f8 call 0xf83d18a6
23: 48 8d 3d 5c 31 0c 06 lea 0x60c315c(%rip),%rdi # 0x60c3186
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: eb c0 jmp 0xfffffff1
31: 89 e9 mov %ebp,%ecx
33: 80 e1 07 and $0x7,%cl
36: 80 c1 03 add $0x3,%cl
39: 38 c1 cmp %al,%cl
3b: 0f .byte 0xf
3c: 8c cd mov %cs,%ebp
3e: fe (bad)
3f: ff .byte 0xff