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NETDEV WATCHDOG: lec0 (): transmit queue 0 timed out
WARNING: CPU: 0 PID: 4184 at net/sched/sch_generic.c:481 dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Modules linked in:
CPU: 0 PID: 4184 Comm: udevd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Code: 77 4c 06 01 48 8b 5c 24 20 48 89 df e8 9c ca e3 ff 48 c7 c7 c0 68 23 8b 48 89 de 48 8b 1c 24 48 89 c2 44 89 e1 e8 83 96 b1 01 <0f> 0b e9 51 fe ff ff e8 37 3a 6c f9 0f 0b e9 33 fe ff ff 89 d9 80
RSP: 0018:ffffc90000007af0 EFLAGS: 00010246
RAX: 11b0bb3763a2bc00 RBX: ffff88807640c448 RCX: ffff888075278000
RDX: 0000000000000100 RSI: 0000000000000102 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffc90000007627 R09: 1ffff92000000ec4
R10: dffffc0000000000 R11: fffff52000000ec5 R12: 0000000000000000
R13: ffff88807640c540 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f600510f880(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60047b5000 CR3: 0000000020682000 CR4: 00000000003506f0
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:lock_acquire+0xd6/0x400 kernel/locking/lockdep.c:5710
Code: 08 00 00 00 e8 8b 82 61 00 44 89 f0 48 0f a3 05 58 3d 10 0d 73 0d e8 99 d4 07 00 84 c0 0f 84 2e 02 00 00 48 c7 c0 d4 65 6d 8e <48> c1 e8 03 42 0f b6 04 38 84 c0 0f 85 1d 02 00 00 83 3d d6 70 10
RSP: 0018:ffffc90002e5f9e0 EFLAGS: 00000202
RAX: ffffffff8e6d65d4 RBX: 0000000000000000 RCX: 11b0bb3763a2bc00
RDX: 0000000000000000 RSI: ffffffff8a7a50e0 RDI: ffffffff8a7a50a0
RBP: ffffc90002e5fb00 R08: ffffffff8e6d322f R09: 1ffffffff1cda645
R10: dffffc0000000000 R11: fffffbfff1cda646 R12: 1ffff920005cbf48
R13: ffff8880751b2c10 R14: 0000000000000000 R15: dffffc0000000000
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:364 [inline]
 browse_rb mm/mmap.c:356 [inline]
 validate_mm+0x360/0xa50 mm/mmap.c:423
 __mmap_region mm/mmap.c:1861 [inline]
 mmap_region+0x1433/0x1730 mm/mmap.c:2941
 do_mmap+0x801/0xe30 mm/mmap.c:1594
 vm_mmap_pgoff+0x1c1/0x2d0 mm/util.c:551
 ksys_mmap_pgoff+0x140/0x790 mm/mmap.c:1643
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f6005273822
Code: 00 00 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 76 5b 5d c3 0f 1f 00 48 8b 05 a1 35 0d 00 64
RSP: 002b:00007ffe1d8282a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6005273822
RDX: 0000000000000003 RSI: 0000000000000200 RDI: 0000000000000000
RBP: 0000000000000022 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000f89200 R14: 000055b2016f00b0 R15: 0000000000f84200
 </TASK>
----------------
Code disassembly (best guess):
   0:	08 00                	or     %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	e8 8b 82 61 00       	call   0x618294
   9:	44 89 f0             	mov    %r14d,%eax
   c:	48 0f a3 05 58 3d 10 	bt     %rax,0xd103d58(%rip)        # 0xd103d6c
  13:	0d
  14:	73 0d                	jae    0x23
  16:	e8 99 d4 07 00       	call   0x7d4b4
  1b:	84 c0                	test   %al,%al
  1d:	0f 84 2e 02 00 00    	je     0x251
  23:	48 c7 c0 d4 65 6d 8e 	mov    $0xffffffff8e6d65d4,%rax
* 2a:	48 c1 e8 03          	shr    $0x3,%rax <-- trapping instruction
  2e:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax
  33:	84 c0                	test   %al,%al
  35:	0f 85 1d 02 00 00    	jne    0x258
  3b:	83                   	.byte 0x83
  3c:	3d                   	.byte 0x3d
  3d:	d6                   	(bad)
  3e:	70 10                	jo     0x50