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NETDEV WATCHDOG: lec0 (): transmit queue 0 timed out
WARNING: CPU: 1 PID: 6618 at net/sched/sch_generic.c:481 dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Modules linked in:
CPU: 1 PID: 6618 Comm: syz.3.811 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: 94 72 05 01 48 8b 5c 24 20 48 89 df e8 6c f2 e3 ff 48 c7 c7 40 4a 22 8b 48 89 de 48 8b 1c 24 48 89 c2 44 89 e1 e8 93 c2 b0 01 <0f> 0b e9 51 fe ff ff e8 57 48 74 f9 0f 0b e9 33 fe ff ff 89 d9 80
RSP: 0000:ffffc90000dd0af0 EFLAGS: 00010246
RAX: c90f6b7471ca7700 RBX: ffff88807c3b8448 RCX: ffff888027045940
RDX: 0000000000000100 RSI: 0000000000000101 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffc90000dd0627 R09: 1ffff920001ba0c4
R10: dffffc0000000000 R11: fffff520001ba0c5 R12: 0000000000000000
R13: ffff88807c3b8540 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007fe98f1e76c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe98725c000 CR3: 0000000059733000 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:lock_acquire+0x208/0x400 kernel/locking/lockdep.c:5627
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f1 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0000:ffffc9000308fca0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000001 RCX: c90f6b7471ca7700
RDX: 0000000000000000 RSI: ffffffff8a2b3e80 RDI: ffffffff8a7a4540
RBP: ffffc9000308fda8 R08: dffffc0000000000 R09: 1ffffffff203de1e
R10: dffffc0000000000 R11: fffffbfff203de1f R12: ffff88807a71a428
R13: 1ffff92000611fa0 R14: 0000000000000246 R15: dffffc0000000000
 down_read_trylock+0x22e/0x3b0 kernel/locking/rwsem.c:1540
 mmap_read_trylock include/linux/mmap_lock.h:136 [inline]
 do_user_addr_fault+0x2bb/0xc90 arch/x86/mm/fault.c:1296
 handle_page_fault arch/x86/mm/fault.c:1443 [inline]
 exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1496
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7fe990e4624e
Code: c1 49 39 4f 08 72 54 8d 4d ff 85 ed 74 3b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007fe98f1e6470 EFLAGS: 00010206
RAX: 0000000000495001 RBX: 00007fe98f1e6530 RCX: 000000000000003c
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fe98f1e65d0
RBP: 0000000000000102 R08: 00007fe986dc7000 R09: 0000000000495000
R10: 0000000000000000 R11: 00007fe98f1e6540 R12: 0000000000000001
R13: 00007fe991046020 R14: 0000000000000000 R15: 00007fe98f1e65d0
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 84 24 80 00 00 00 	testl  $0x200,0x80(%rsp)
   7:	00 02 00 00
   b:	43 c6 44 3d 04 f8    	movb   $0xf8,0x4(%r13,%r15,1)
  11:	0f 85 f1 00 00 00    	jne    0x108
  17:	41 f7 c6 00 02 00 00 	test   $0x200,%r14d
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	48 c7 44 24 60 0e 36 	movq   $0x45e0360e,0x60(%rsp)
  28:	e0 45
* 2a:	4b c7 44 3d 00 00 00 	movq   $0x0,0x0(%r13,%r15,1) <-- trapping instruction
  31:	00 00
  33:	43 c7 44 3d 08 00 00 	movl   $0x0,0x8(%r13,%r15,1)
  3a:	00 00
  3c:	65                   	gs
  3d:	48                   	rex.W
  3e:	8b                   	.byte 0x8b
  3f:	04                   	.byte 0x4