------------[ cut here ]------------ NETDEV WATCHDOG: sl0 (): transmit queue 0 timed out WARNING: CPU: 0 PID: 3916 at net/sched/sch_generic.c:478 dev_watchdog+0x93c/0xb10 net/sched/sch_generic.c:477 Modules linked in: CPU: 0 PID: 3916 Comm: kworker/u4:6 Not tainted 5.15.159-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: netns cleanup_net RIP: 0010:dev_watchdog+0x93c/0xb10 net/sched/sch_generic.c:477 Code: 05 3d 7e 7b 05 01 48 8b 5c 24 28 48 89 df e8 fb ba e2 ff 48 c7 c7 00 c5 7c 8b 48 89 de 48 89 c2 48 8b 4c 24 10 e8 54 6a f6 f8 <0f> 0b e9 fe fc ff ff e8 f8 c1 2a f9 0f 0b e9 83 fc ff ff 44 89 e1 RSP: 0018:ffffc90000007b10 EFLAGS: 00010246 RAX: 9cae8377f76a8800 RBX: ffff88807a6b6000 RCX: ffff888022933b80 RDX: 0000000080000101 RSI: 0000000080000101 RDI: 0000000000000000 RBP: 00000000ffffb401 R08: ffffffff8166860c R09: ffffed1017344f24 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807a6b6448 R13: ffff88807a6b6440 R14: ffff88807a6b6540 R15: ffff88807a6b6460 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fffa76e2be8 CR3: 00000000644b2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451 expire_timers kernel/time/timer.c:1496 [inline] __run_timers+0x67c/0x890 kernel/time/timer.c:1767 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x155/0x240 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:synchronize_rcu+0x0/0x1a0 kernel/rcu/tree.c:3790 Code: e8 e5 e6 5e 00 e9 68 fd ff ff 48 c7 c7 a0 47 92 8c 48 89 de e8 b1 3d bf 02 e9 b5 fa ff ff e8 a7 b9 b2 08 0f 1f 80 00 00 00 00 <55> 48 89 e5 41 57 41 56 41 54 53 48 83 e4 e0 48 81 ec 00 01 00 00 RSP: 0018:ffffc900034177d8 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92000682f04 RCX: ffffffff913eff03 RDX: 0000000000000000 RSI: ffffffff8a8b3780 RDI: ffffffff8ad8f680 RBP: ffffc900034178b0 R08: dffffc0000000000 R09: fffffbfff22b743f R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff913e3788 R13: 1ffff92000682f00 R14: 0000000000000203 R15: ffffc90003417820 lockdep_unregister_key+0x4e6/0x5b0 kernel/locking/lockdep.c:6319 unregister_netdevice_many+0x12bb/0x18f0 net/core/dev.c:11110 default_device_exit_batch+0x390/0x3f0 net/core/dev.c:11626 ops_exit_list net/core/net_namespace.c:177 [inline] cleanup_net+0x763/0xb60 net/core/net_namespace.c:599 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300 ---------------- Code disassembly (best guess): 0: e8 e5 e6 5e 00 call 0x5ee6ea 5: e9 68 fd ff ff jmp 0xfffffd72 a: 48 c7 c7 a0 47 92 8c mov $0xffffffff8c9247a0,%rdi 11: 48 89 de mov %rbx,%rsi 14: e8 b1 3d bf 02 call 0x2bf3dca 19: e9 b5 fa ff ff jmp 0xfffffad3 1e: e8 a7 b9 b2 08 call 0x8b2b9ca 23: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) * 2a: 55 push %rbp <-- trapping instruction 2b: 48 89 e5 mov %rsp,%rbp 2e: 41 57 push %r15 30: 41 56 push %r14 32: 41 54 push %r12 34: 53 push %rbx 35: 48 83 e4 e0 and $0xffffffffffffffe0,%rsp 39: 48 81 ec 00 01 00 00 sub $0x100,%rsp