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NETDEV WATCHDOG: lec0 (): transmit queue 0 timed out
WARNING: CPU: 1 PID: 4575 at net/sched/sch_generic.c:481 dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Modules linked in:
CPU: 1 PID: 4575 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Code: 8d 51 06 01 48 8b 5c 24 20 48 89 df e8 6c cb e3 ff 48 c7 c7 40 5e 22 8b 48 89 de 48 8b 1c 24 48 89 c2 44 89 e1 e8 33 46 b1 01 <0f> 0b e9 51 fe ff ff e8 b7 3f 73 f9 0f 0b e9 33 fe ff ff 89 d9 80
RSP: 0018:ffffc90000dd0af0 EFLAGS: 00010246
RAX: dd0ceab051473000 RBX: ffff88807ddce448 RCX: ffff88805b661dc0
RDX: 0000000000000100 RSI: 0000000000000102 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffc90000dd0627 R09: 1ffff920001ba0c4
R10: dffffc0000000000 R11: fffff520001ba0c5 R12: 0000000000000000
R13: ffff88807ddce540 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f6f7599c880(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6f75038000 CR3: 0000000023730000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:unwind_next_frame+0x3f0/0x1cf0 arch/x86/kernel/unwind_orc.c:461
Code: 4d 89 fd 49 c1 ed 03 48 bd 00 00 00 00 00 fc ff df 41 0f b6 44 2d 00 84 c0 0f 85 f0 12 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 fd 12 00 00 41 0f b7 07 41 89 c6 41 83 e6 0f 66 41 83
RSP: 0018:ffffc90003177910 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffc900031779a8 RCX: ffffffff8e7a4158
RDX: ffffffff8ee65ade RSI: ffffffff8e7a4154 RDI: ffffffff81351ed7
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000006
R10: dffffc0000000000 R11: fffff5200062ef41 R12: ffffffff8ee65ade
R13: 1ffffffff1dccb5c R14: ffffffff8ee65ae3 R15: ffffffff8ee65ae2
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1710 [inline]
 slab_free_freelist_hook+0xec/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kmem_cache_free+0x8f/0x210 mm/slub.c:3520
 file_free fs/file_table.c:55 [inline]
 __fput+0x5d9/0x8c0 fs/file_table.c:324
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:184
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217
 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f6f75a8a407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe06eb3d30 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f6f7599c880 RCX: 00007f6f75a8a407
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007ffe06eb3dd0 R14: 0000000000000000 R15: 0000000000000009
 </TASK>
----------------
Code disassembly (best guess):
   0:	4d 89 fd             	mov    %r15,%r13
   3:	49 c1 ed 03          	shr    $0x3,%r13
   7:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
   e:	fc ff df
  11:	41 0f b6 44 2d 00    	movzbl 0x0(%r13,%rbp,1),%eax
  17:	84 c0                	test   %al,%al
  19:	0f 85 f0 12 00 00    	jne    0x130f
  1f:	4c 89 f0             	mov    %r14,%rax
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
* 2a:	84 c0                	test   %al,%al <-- trapping instruction
  2c:	0f 85 fd 12 00 00    	jne    0x132f
  32:	41 0f b7 07          	movzwl (%r15),%eax
  36:	41 89 c6             	mov    %eax,%r14d
  39:	41 83 e6 0f          	and    $0xf,%r14d
  3d:	66                   	data16
  3e:	41                   	rex.B
  3f:	83                   	.byte 0x83