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1
WARNING: net/netfilter/nf_flow_table_core.c:546 at nf_flow_table_extend_ct_timeout+0x1ee/0x2f0 net/netfilter/nf_flow_table_core.c:546, CPU#0: kworker/0:9/18199
Modules linked in:
CPU: 0 UID: 0 PID: 18199 Comm: kworker/0:9 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_power_efficient nf_flow_offload_work_gc
RIP: 0010:nf_flow_table_extend_ct_timeout+0x1ee/0x2f0 net/netfilter/nf_flow_table_core.c:546
Code: 00 00 00 41 83 ff 06 0f 84 9a 00 00 00 41 83 ff 05 0f 85 b0 00 00 00 e8 70 d1 ab f7 41 bf 30 75 00 00 eb 0f e8 63 d1 ab f7 90 <0f> 0b 90 41 bf 01 00 00 00 48 c7 c0 80 f2 a0 8e 48 c1 e8 03 42 80
RSP: 0000:ffffc9000ac4f938 EFLAGS: 00010293
RAX: ffffffff8a1bf92d RBX: ffff88807839cc00 RCX: ffff888028bebe80
RDX: 0000000000000000 RSI: ffffffff902f6960 RDI: 000000000000002f
RBP: 000000000001a453 R08: ffff888028bebe80 R09: 0000000000000002
R10: 0000000000000011 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff1100f073998 R14: ffff88807839cc48 R15: 000000000000002f
FS:  0000000000000000(0000) GS:ffff888124cd2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8773d85000 CR3: 00000000792b6000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nf_flow_offload_gc_step+0x545/0x7b0 net/netfilter/nf_flow_table_core.c:581
 nf_flow_table_iterate+0x13c/0x1f0 net/netfilter/nf_flow_table_core.c:452
 nf_flow_table_gc_run net/netfilter/nf_flow_table_core.c:604 [inline]
 nf_flow_offload_work_gc+0x22/0x70 net/netfilter/nf_flow_table_core.c:612
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>