syzbot


WARNING in dev_watchdog (2)

Status: fixed on 2024/01/30 15:47
Subsystems: net
[Documentation on labels]
Reported-by: syzbot+d55372214aff0faa1f1f@syzkaller.appspotmail.com
Fix commit: e316dd1cf135 net: don't dump stack on queue timeout
First crash: 1603d, last: 82d
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in dev_watchdog (log)
Repro: C syz .config
  
Discussions (8)
Title Replies (including bot) Last reply
[PATCH net-next] net: don't dump stack on queue timeout 2 (2) 2023/11/15 10:30
[RFC net-next] net: don't dump stack on queue timeout 8 (8) 2023/11/10 19:21
[syzbot] Monthly net report (Jul 2023) 0 (1) 2023/08/01 12:53
[syzbot] Monthly net report (Jun 2023) 0 (1) 2023/06/29 12:38
[syzbot] Monthly net report (May 2023) 0 (1) 2023/05/30 10:56
[syzbot] Monthly net report (Apr 2023) 0 (1) 2023/04/27 10:45
[syzbot] Monthly net report 0 (1) 2023/03/27 11:04
WARNING in dev_watchdog (2) 0 (2) 2021/12/11 08:02
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in dev_watchdog origin:upstream missing-backport C inconclusive 145 4d07h 405d 0/3 upstream: reported C repro on 2023/03/11 19:14
upstream WARNING in dev_watchdog 25 2407d 2431d 0/26 closed as invalid on 2017/10/22 12:45
linux-5.15 WARNING in dev_watchdog missing-backport origin:lts-only C inconclusive 138 3d16h 406d 0/3 upstream: reported C repro on 2023/03/10 20:16

Sample crash report:
------------[ cut here ]------------
NETDEV WATCHDOG: sl0 (): transmit queue 0 timed out 25610 ms
WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:525 dev_watchdog+0x8cd/0x8f0 net/sched/sch_generic.c:525
Modules linked in:
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:dev_watchdog+0x8cd/0x8f0 net/sched/sch_generic.c:525
Code: 1e 77 06 01 90 48 8b 5c 24 10 48 89 df e8 0b 32 e6 ff 45 89 e8 89 e9 48 89 de 48 89 c2 48 c7 c7 20 51 ec 8b e8 94 30 c1 f8 90 <0f> 0b 90 90 e9 23 fd ff ff e8 65 ef fa f8 90 0f 0b 90 e9 bc fc ff
RSP: 0018:ffffc90000007be0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88801f818000 RCX: ffffffff814ca739
RDX: ffffffff8cc95900 RSI: ffffffff814ca746 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888018354000
R13: 000000000000640a R14: ffff88801f818548 R15: 00000000ffffbe00
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0efd6bf0d0 CR3: 000000000cd77000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 call_timer_fn+0x193/0x590 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb20 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x21a/0x8de kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:113
Code: ed c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 65 48 8b 04 25 00 bd 03 00 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 37 b9 ba 00 fb f4 <fa> c3 0f 1f 00 0f b6 47 08 3c 01 74 0b 3c 02 74 05 8b 7f 04 eb 9f
RSP: 0018:ffffffff8cc07d68 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8a7f2a77
RDX: 0000000000000001 RSI: ffff888146644000 RDI: ffff888146644064
RBP: ffff888146644064 R08: 0000000000000001 R09: ffffed1017306dbd
R10: ffff8880b9836deb R11: 0000000000000000 R12: ffff888014371000
R13: ffffffff8db11aa0 R14: 0000000000000000 R15: 0000000000000000
 acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x83/0x500 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388
 cpuidle_idle_call kernel/sched/idle.c:215 [inline]
 do_idle+0x319/0x400 kernel/sched/idle.c:282
 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380
 rest_init+0x16f/0x2b0 init/main.c:730
 arch_call_rest_init+0x13/0x30 init/main.c:827
 start_kernel+0x39f/0x480 init/main.c:1072
 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555
 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536
 secondary_startup_64_no_verify+0x178/0x17b
 </TASK>
----------------
Code disassembly (best guess):
   0:	ed                   	in     (%dx),%eax
   1:	c3                   	ret
   2:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00 00
   d:	66 90                	xchg   %ax,%ax
   f:	65 48 8b 04 25 00 bd 	mov    %gs:0x3bd00,%rax
  16:	03 00
  18:	48 8b 00             	mov    (%rax),%rax
  1b:	a8 08                	test   $0x8,%al
  1d:	75 0c                	jne    0x2b
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 37 b9 ba 00 	verw   0xbab937(%rip)        # 0xbab95f
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	fa                   	cli <-- trapping instruction
  2b:	c3                   	ret
  2c:	0f 1f 00             	nopl   (%rax)
  2f:	0f b6 47 08          	movzbl 0x8(%rdi),%eax
  33:	3c 01                	cmp    $0x1,%al
  35:	74 0b                	je     0x42
  37:	3c 02                	cmp    $0x2,%al
  39:	74 05                	je     0x40
  3b:	8b 7f 04             	mov    0x4(%rdi),%edi
  3e:	eb 9f                	jmp    0xffffffdf

Crashes (6791):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/27 05:39 upstream fbafc3e621c3 fb427a07 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in dev_watchdog
2023/10/14 04:02 upstream ad7f1baed071 6388bc36 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dev_watchdog
2021/12/11 08:02 upstream b8a98b6bf66a 49ca1f59 .config console log report syz C ci-upstream-kasan-gce-smack-root WARNING in dev_watchdog
2024/01/25 22:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca cc4a4020 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/21 10:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 9bd8dcda .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2023/11/11 00:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8de1e7afcc1c 45e9b83e .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2023/08/08 23:25 linux-next 71cd4fc492ec 3c27dfcd .config strace log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in dev_watchdog
2023/05/28 20:51 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/10 22:15 upstream ab27740f7665 04815ef1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dev_watchdog
2024/01/10 17:33 upstream ab27740f7665 04815ef1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dev_watchdog
2024/01/10 10:13 upstream 6c1dd1fe5d8a b438bd66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in dev_watchdog
2024/01/10 06:12 upstream 6c1dd1fe5d8a b438bd66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/10 04:35 upstream 6c1dd1fe5d8a b438bd66 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/09 00:54 upstream 5db8752c3b81 4c0fd4bb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/07 18:02 upstream 52b1853b080a d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/06 06:24 upstream 6d0dc8559c84 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/05 07:23 upstream 5eff55d725a4 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in dev_watchdog
2024/01/04 22:05 upstream 5eff55d725a4 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dev_watchdog
2024/01/04 10:28 upstream ac865f00af29 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/02 14:06 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/02 09:20 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in dev_watchdog
2023/12/31 19:42 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2023/12/30 09:04 upstream f016f7547aee fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in dev_watchdog
2023/12/29 17:02 upstream 8735c7c84d1b fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2023/12/28 08:53 upstream f5837722ffec fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in dev_watchdog
2023/12/26 13:01 upstream fbafc3e621c3 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in dev_watchdog
2023/12/26 07:41 upstream fbafc3e621c3 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in dev_watchdog
2023/12/26 00:13 upstream 861deac3b092 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2023/12/24 20:08 upstream 861deac3b092 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in dev_watchdog
2024/01/12 01:37 upstream de927f6c0b07 00f3cc59 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in dev_watchdog
2024/01/05 20:29 upstream 6d0dc8559c84 d0304e9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in dev_watchdog
2024/01/01 23:53 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in dev_watchdog
2023/12/31 07:46 upstream 453f5db0619e fb427a07 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in dev_watchdog
2023/12/26 14:28 upstream fbafc3e621c3 fb427a07 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in dev_watchdog
2024/01/03 15:57 upstream 610a9b8f49fb 28c42cff .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in dev_watchdog
2023/12/28 12:12 upstream f5837722ffec fb427a07 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in dev_watchdog
2023/07/13 03:56 upstream eb26cbb1a754 86081196 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in dev_watchdog
2023/04/15 16:09 upstream 7a934f4bd7d6 ec410564 .config console log report info ci-qemu2-arm64 WARNING in dev_watchdog
2023/03/07 04:40 upstream 8ca09d5fa354 f8902b57 .config console log report info ci-qemu2-arm64-mte WARNING in dev_watchdog
2022/08/28 23:10 upstream c1c76700a0d6 07177916 .config console log report info ci-qemu2-arm32 WARNING in dev_watchdog
2023/11/10 13:04 linux-next e27090b1413f 45e9b83e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in dev_watchdog
2023/10/17 01:34 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5220d8b04a84 342b9c55 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb WARNING in dev_watchdog
2024/01/28 09:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/28 07:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/26 17:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/24 03:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/23 13:12 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 1c0ecc51 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/20 05:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 9bd8dcda .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/16 22:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/16 19:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/16 05:41 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/15 16:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/14 05:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 551587c1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/14 02:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 551587c1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/12 17:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca dda5a988 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/11 21:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 00f3cc59 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/09 10:57 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 0802e17d9aca 4c0fd4bb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2024/01/01 21:16 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aafe7ad77b91 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2023/12/31 11:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aafe7ad77b91 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2023/12/27 12:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aafe7ad77b91 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2023/12/25 18:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aafe7ad77b91 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2023/12/25 04:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aafe7ad77b91 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in dev_watchdog
2019/12/03 08:49 upstream 76bb8b05960c ab342da3 .config console log report ci-qemu-upstream
2019/11/29 10:36 upstream 81b6b96475ac 4f7e1d0f .config console log report ci-qemu-upstream
2021/01/17 07:08 upstream 0da0a8a0a0e1 65a7a854 .config console log report info ci-qemu-upstream-386
* Struck through repros no longer work on HEAD.