syzbot

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NETDEV WATCHDOG: sl0 (): transmit queue 0 timed out
WARNING: CPU: 1 PID: 0 at net/sched/sch_generic.c:478 dev_watchdog+0x93c/0xb10 net/sched/sch_generic.c:477
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.15.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:dev_watchdog+0x93c/0xb10 net/sched/sch_generic.c:477
Code: 05 a8 19 7d 05 01 48 8b 5c 24 28 48 89 df e8 8b cc e2 ff 48 c7 c7 40 0f 7c 8b 48 89 de 48 89 c2 48 8b 4c 24 10 e8 d4 a6 f8 f8 <0f> 0b e9 fe fc ff ff e8 58 f4 2c f9 0f 0b e9 83 fc ff ff 44 89 e1
RSP: 0018:ffffc90000dd0b10 EFLAGS: 00010246
RAX: c81e7bda9ea2ed00 RBX: ffff8880796b8000 RCX: ffff888012968000
RDX: 0000000000000102 RSI: 0000000000000102 RDI: 0000000000000000
RBP: 00000000ffffb301 R08: ffffffff81665dbc R09: fffff520001ba0a5
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880796b8448
R13: ffff8880796b8440 R14: ffff8880796b8540 R15: ffff8880796b8460
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff5a384118 CR3: 000000000c68e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1737
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1750
 __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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:132 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:570
Code: 41 5a f7 48 83 e3 08 0f 85 0a 01 00 00 4c 8d 74 24 20 e8 44 b8 60 f7 0f 1f 44 00 00 e8 2a 3d 5a f7 0f 00 2d a3 95 bc 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 3b f0 a3 f7
RSP: 0018:ffffc90000d67b00 EFLAGS: 000002d3
RAX: ffffffff8a25f016 RBX: 0000000000000000 RCX: ffff888012968000
RDX: 0000000000000000 RSI: ffffffff8a8b0f80 RDI: ffffffff8ad87e00
RBP: ffffc90000d67b90 R08: ffffffff8186a880 R09: ffffed100252d001
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001acf60
R13: ffff8881413a6004 R14: ffffc90000d67b20 R15: dffffc0000000000
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:705
 cpuidle_enter_state+0x521/0xef0 drivers/cpuidle/cpuidle.c:237
 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:351
 call_cpuidle kernel/sched/idle.c:158 [inline]
 cpuidle_idle_call kernel/sched/idle.c:239 [inline]
 do_idle+0x3e4/0x670 kernel/sched/idle.c:306
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
 start_secondary+0x371/0x500 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xb1/0xbb
 </TASK>
----------------
Code disassembly (best guess):
   0:	41 5a                	pop    %r10
   2:	f7 48 83 e3 08 0f 85 	testl  $0x850f08e3,-0x7d(%rax)
   9:	0a 01                	or     (%rcx),%al
   b:	00 00                	add    %al,(%rax)
   d:	4c 8d 74 24 20       	lea    0x20(%rsp),%r14
  12:	e8 44 b8 60 f7       	call   0xf760b85b
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	e8 2a 3d 5a f7       	call   0xf75a3d4b
  21:	0f 00 2d a3 95 bc 00 	verw   0xbc95a3(%rip)        # 0xbc95cb
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	4c 89 f3             	mov    %r14,%rbx <-- trapping instruction
  2d:	48 c1 eb 03          	shr    $0x3,%rbx
  31:	42 80 3c 3b 00       	cmpb   $0x0,(%rbx,%r15,1)
  36:	74 08                	je     0x40
  38:	4c 89 f7             	mov    %r14,%rdi
  3b:	e8 3b f0 a3 f7       	call   0xf7a3f07b