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NETDEV WATCHDOG: lec0 (): transmit queue 0 timed out
WARNING: CPU: 1 PID: 6333 at net/sched/sch_generic.c:481 dev_watchdog+0x85d/0xa40 net/sched/sch_generic.c:480
Modules linked in:
CPU: 1 PID: 6333 Comm: syz.1.713 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: 8f 72 05 01 48 8b 5c 24 20 48 89 df e8 5c f2 e3 ff 48 c7 c7 c0 46 22 8b 48 89 de 48 8b 1c 24 48 89 c2 44 89 e1 e8 03 62 b0 01 <0f> 0b e9 51 fe ff ff e8 d7 34 74 f9 0f 0b e9 33 fe ff ff 89 d9 80
RSP: 0018:ffffc90000dd0af0 EFLAGS: 00010246
RAX: 91fa0b4b86679500 RBX: ffff88807a540448 RCX: ffff8880295d1dc0
RDX: 0000000000000100 RSI: 0000000000000101 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffc90000dd0627 R09: 1ffff920001ba0c4
R10: dffffc0000000000 R11: fffff520001ba0c5 R12: 0000000000000000
R13: ffff88807a540540 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f49c71bb6c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fede76edfac CR3: 0000000078605000 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:rmqueue_pcplist mm/page_alloc.c:3711 [inline]
RIP: 0010:rmqueue mm/page_alloc.c:3742 [inline]
RIP: 0010:get_page_from_freelist+0x1f20/0x2670 mm/page_alloc.c:4189
Code: 8f 84 24 c0 01 00 00 f7 84 24 c0 01 00 00 00 02 00 00 c6 44 08 04 f8 0f 85 89 02 00 00 41 f7 c5 00 02 00 00 74 01 fb 4d 85 f6 <44> 8b 6c 24 2c 0f 84 d5 00 00 00 4c 89 f0 48 c1 e8 03 80 3c 08 00
vkms_vblank_simulate: vblank timer overrun
RSP: 0018:ffffc9000322ef20 EFLAGS: 00000282
RAX: 1ffff92000645e18 RBX: ffffffff8be3d828 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a4200
RBP: ffffc9000322f170 R08: ffffffff901ee0f7 R09: 1ffffffff203dc1e
R10: dffffc0000000000 R11: fffffbfff203dc1f R12: ffff88813fffd310
R13: 0000000000000202 R14: ffffea0001766940 R15: 0000000001100cca
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_pages_vma+0x2bc/0x790 mm/mempolicy.c:2146
 shmem_alloc_page mm/shmem.c:1586 [inline]
 shmem_alloc_and_acct_page+0x47f/0xbe0 mm/shmem.c:1611
 shmem_getpage_gfp+0x14be/0x2c10 mm/shmem.c:1906
 shmem_fault+0x1ac/0x550 mm/shmem.c:2118
 __do_fault+0x141/0x330 mm/memory.c:3928
 do_read_fault mm/memory.c:4264 [inline]
 do_fault mm/memory.c:4392 [inline]
 handle_pte_fault mm/memory.c:4650 [inline]
 __handle_mm_fault mm/memory.c:4785 [inline]
 handle_mm_fault+0x2982/0x4440 mm/memory.c:4883
 faultin_page mm/gup.c:976 [inline]
 __get_user_pages+0x952/0x11e0 mm/gup.c:1197
 populate_vma_page_range+0x213/0x290 mm/gup.c:1529
 __mm_populate+0x275/0x3b0 mm/gup.c:1638
 mm_populate include/linux/mm.h:2646 [inline]
 vm_mmap_pgoff+0x212/0x2d0 mm/util.c:556
 ksys_mmap_pgoff+0x140/0x790 mm/mmap.c:1635
 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: 0033:0x7f49c8f63019
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:00007f49c71bb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f49c91eafa0 RCX: 00007f49c8f63019
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f49c8ffa00c R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f49c91eb038 R14: 00007f49c91eafa0 R15: 00007ffd92ed9878
 </TASK>
----------------
Code disassembly (best guess):
   0:	8f 84 24 c0 01 00 00 	pop    0x1c0(%rsp)
   7:	f7 84 24 c0 01 00 00 	testl  $0x200,0x1c0(%rsp)
   e:	00 02 00 00
  12:	c6 44 08 04 f8       	movb   $0xf8,0x4(%rax,%rcx,1)
  17:	0f 85 89 02 00 00    	jne    0x2a6
  1d:	41 f7 c5 00 02 00 00 	test   $0x200,%r13d
  24:	74 01                	je     0x27
  26:	fb                   	sti
  27:	4d 85 f6             	test   %r14,%r14
* 2a:	44 8b 6c 24 2c       	mov    0x2c(%rsp),%r13d <-- trapping instruction
  2f:	0f 84 d5 00 00 00    	je     0x10a
  35:	4c 89 f0             	mov    %r14,%rax
  38:	48 c1 e8 03          	shr    $0x3,%rax
  3c:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1)