------------[ cut here ]------------
NETDEV WATCHDOG: lec0 (): transmit queue 0 timed out
WARNING: CPU: 0 PID: 27296 at net/sched/sch_generic.c:481 dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Modules linked in:
CPU: 0 PID: 27296 Comm: syz.7.5790 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: 3615fe8ff1115a00 RBX: ffff888078124448 RCX: ffff888024cd5940
RDX: 0000000000000100 RSI: 0000000000000101 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffff8880b8e2795b R09: 1ffff110171c4f2b
R10: dffffc0000000000 R11: ffffed10171c4f2c R12: 0000000000000000
R13: ffff888078124540 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f0172d146c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4734d2c000 CR3: 000000007705e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749
Code: 75 11 e8 b3 e9 18 00 4d 85 e4 75 16 e8 a9 e9 18 00 eb 15 e8 a2 e9 18 00 e8 6d 47 69 08 4d 85 e4 74 ea e8 93 e9 18 00 fb 31 ff <89> de e8 e9 ec 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 77
RSP: 0018:ffffc90002e0f3e0 EFLAGS: 00000246
RAX: ffffffff816043fd RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90004601000 RSI: 000000000007ffff RDI: 0000000000000000
RBP: ffffc90002e0f650 R08: ffffffff910470c7 R09: 1ffffffff2208e18
R10: dffffc0000000000 R11: fffffbfff2208e19 R12: 0000000000000200
R13: 0000000000000045 R14: 0000000000000000 R15: dffffc0000000000
do_con_write+0x6b87/0x6c70 drivers/tty/vt/vt.c:2968
con_write+0x1f/0x40 drivers/tty/vt/vt.c:3298
process_output_block drivers/tty/n_tty.c:592 [inline]
n_tty_write+0xd19/0x1220 drivers/tty/n_tty.c:2339
do_tty_write drivers/tty/tty_io.c:1029 [inline]
file_tty_write+0x50c/0x8a0 drivers/tty/tty_io.c:1100
call_write_iter include/linux/fs.h:2179 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0x748/0xd70 fs/read_write.c:594
ksys_write+0x153/0x260 fs/read_write.c:647
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: 0033:0x7f0174abdb19
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0172d14028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0174d43fa0 RCX: 00007f0174abdb19
RDX: 0000000000001006 RSI: 0000200000000940 RDI: 0000000000000004
RBP: 00007f0174b55af8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0174d44038 R14: 00007f0174d43fa0 R15: 00007ffc48ab7ed8
----------------
Code disassembly (best guess):
0: 75 11 jne 0x13
2: e8 b3 e9 18 00 call 0x18e9ba
7: 4d 85 e4 test %r12,%r12
a: 75 16 jne 0x22
c: e8 a9 e9 18 00 call 0x18e9ba
11: eb 15 jmp 0x28
13: e8 a2 e9 18 00 call 0x18e9ba
18: e8 6d 47 69 08 call 0x869478a
1d: 4d 85 e4 test %r12,%r12
20: 74 ea je 0xc
22: e8 93 e9 18 00 call 0x18e9ba
27: fb sti
28: 31 ff xor %edi,%edi
* 2a: 89 de mov %ebx,%esi <-- trapping instruction
2c: e8 e9 ec 18 00 call 0x18ed1a
31: 85 db test %ebx,%ebx
33: 0f 94 c0 sete %al
36: 22 44 24 1f and 0x1f(%rsp),%al
3a: 3c 01 cmp $0x1,%al
3c: 75 1f jne 0x5d
3e: e8 .byte 0xe8
3f: 77 .byte 0x77