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BUG: workqueue lockup (2)

Status: upstream: reported C repro on 2023/03/05 21:10
Reported-by: syzbot+94b3d6f6cf4c1e28df60@syzkaller.appspotmail.com
First crash: 1227d, last: 4h02m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (16)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: workqueue lockup (4) block -1 C 47 2072d 2479d 15/29 fixed on 2019/12/13 00:31
linux-5.15 BUG: workqueue lockup missing-backport origin:upstream -1 C done 615 1d09h 863d 0/3 upstream: reported C repro on 2023/03/11 08:51
android-5-15 BUG: workqueue lockup origin:upstream missing-backport -1 C error 3688 4h38m 759d 0/2 upstream: reported C repro on 2023/06/22 22:19
upstream BUG: workqueue lockup (2) -1 C 406 2629d 2787d 5/29 fixed on 2018/05/13 10:02
linux-4.14 BUG: workqueue lockup -1 C 282 873d 2275d 0/1 upstream: reported C repro on 2019/04/29 11:26
upstream BUG: workqueue lockup -1 C 172 2809d 2820d 3/29 fixed on 2017/11/11 01:37
upstream BUG: workqueue lockup (5) net 1 C done 12913 2h54m 2014d 0/29 upstream: reported C repro on 2020/01/14 22:04
upstream BUG: workqueue lockup (3) -1 C 1215 2573d 2625d 8/29 fixed on 2018/07/09 18:05
android-6-1 BUG: workqueue lockup origin:upstream missing-backport -1 C error 3697 3h33m 729d 0/2 upstream: reported C repro on 2023/07/23 17:25
linux-6.6 BUG: workqueue lockup origin:upstream -1 C 6 8d18h 34d 0/2 upstream: reported C repro on 2025/06/17 05:08
android-414 BUG: workqueue lockup -1 C 114 2137d 2293d 0/1 public: reported C repro on 2019/04/11 00:00
linux-4.19 BUG: workqueue lockup -1 C error 41 867d 2281d 0/1 upstream: reported C repro on 2019/04/22 20:37
android-5-10 BUG: workqueue lockup -1 C error 25 1267d 1366d 0/2 closed as invalid on 2022/02/22 17:18
android-49 BUG: workqueue lockup -1 C 69 2061d 2293d 0/3 public: reported C repro on 2019/04/11 08:44
android-6-12 BUG: workqueue lockup -1 1 3d00h 3d00h 0/1 premoderation: reported on 2025/07/18 16:39
linux-6.1 BUG: workqueue lockup origin:upstream missing-backport -1 C unreliable 314 19h12m 866d 0/3 upstream: reported C repro on 2023/03/07 17:51
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2022/11/10 01:20 27m bisect fix android12-5.10-lts OK (0) job log log
2022/09/22 07:49 28m bisect fix android12-5.10-lts OK (0) job log log
2022/08/23 07:16 31m bisect fix android12-5.10-lts OK (0) job log log
2022/07/24 06:47 28m bisect fix android12-5.10-lts OK (0) job log log

Sample crash report:
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 174s!
BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 173s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: psi_avgs_work
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_shepherd
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512 refcnt=3
    pending: toggle_allocation_gate
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: check_lifetime
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
    pending: neigh_periodic_work, neigh_periodic_work, gc_worker
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
workqueue dm_bufio_cache: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: work_fn
workqueue ipv6_addrconf: flags=0x40008
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2
    pending: addrconf_verify_work

Crashes (9557):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/21 02:50 android13-5.10-lts 6de38b5f6c2b 7117feec .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/21 00:27 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 18:09 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 12:28 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 08:58 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 03:30 android13-5.10-lts 6de38b5f6c2b 7117feec .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 01:38 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/11 01:31 android13-5.10-lts 59e9a7228857 3cda49cf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/10 15:43 android13-5.10-lts 59e9a7228857 956bd956 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/10 10:32 android13-5.10-lts 59e9a7228857 956bd956 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/10 01:27 android13-5.10-lts 59e9a7228857 f4e5e155 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/09 23:03 android13-5.10-lts 59e9a7228857 f4e5e155 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/04 07:34 android13-5.10-lts 59e9a7228857 76ad128c .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/02 01:26 android13-5.10-lts 59e9a7228857 091a06cd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/23 13:34 android13-5.10-lts d76d4cd0623a d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/23 11:01 android13-5.10-lts d76d4cd0623a d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/22 14:08 android13-5.10-lts d76d4cd0623a d6cdfb8a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/20 22:07 android13-5.10-lts d76d4cd0623a 804b3919 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/11 01:44 android13-5.10-lts d76d4cd0623a 5d7e17ca .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/07 19:52 android13-5.10-lts d76d4cd0623a 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/07 17:41 android13-5.10-lts d76d4cd0623a 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/07 14:12 android13-5.10-lts d76d4cd0623a 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2023/03/05 21:07 android12-5.10-lts 416c4356f372 f8902b57 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/17 18:31 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/17 01:36 android13-5.10-lts 6de38b5f6c2b 44f8051e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/16 17:32 android13-5.10-lts 6de38b5f6c2b 124ec9cc .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/16 13:46 android13-5.10-lts 6de38b5f6c2b 124ec9cc .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/16 05:38 android13-5.10-lts 09ea5912bc1f 03fcfc4b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/14 04:46 android13-5.10-lts 59e9a7228857 3cda49cf .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/10 12:37 android13-5.10-lts 59e9a7228857 956bd956 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/03 03:22 android13-5.10-lts 59e9a7228857 bc80e4f0 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/01 00:58 android13-5.10-lts 59e9a7228857 6e83b42d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/28 21:43 android13-5.10-lts 59e9a7228857 fc9d8ee5 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/28 08:41 android13-5.10-lts 59e9a7228857 fc9d8ee5 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/28 05:34 android13-5.10-lts 59e9a7228857 fc9d8ee5 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/25 05:39 android13-5.10-lts d76d4cd0623a 26d77996 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/24 06:57 android13-5.10-lts d76d4cd0623a e2f27c35 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/16 03:27 android13-5.10-lts d76d4cd0623a 5f4b362d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/15 05:11 android13-5.10-lts d76d4cd0623a 5f4b362d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/15 01:34 android13-5.10-lts d76d4cd0623a 5f4b362d .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/06/07 10:09 android13-5.10-lts d76d4cd0623a 4826c28e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2022/10/08 18:58 android12-5.10-lts bc7618b4936f aea5da89 .config strace log report syz [disk image] [vmlinux] ci2-android-5-10 BUG: workqueue lockup
2022/05/25 21:03 android12-5.10-lts 0974b8411a58 3037caa9 .config console log report syz ci2-android-5-10 BUG: workqueue lockup
2025/07/21 13:30 android13-5.10-lts ad9a98ef27a4 56d87229 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/21 10:16 android13-5.10-lts ad9a98ef27a4 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/21 08:17 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/21 06:53 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/21 05:15 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/21 02:15 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 23:57 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 22:43 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 21:39 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 20:33 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 18:59 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 17:37 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 16:12 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 14:48 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 13:42 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 09:43 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 08:10 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 07:04 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 04:44 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/20 03:41 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 22:28 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 20:41 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 18:58 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 17:03 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 14:30 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 13:25 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 11:05 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 10:03 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 04:16 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 02:59 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10-perf BUG: workqueue lockup
2025/07/19 01:47 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/19 00:43 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 21:28 android13-5.10-lts 6de38b5f6c2b 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 19:14 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 17:31 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 17:26 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 16:06 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 14:18 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 09:51 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 04:56 android13-5.10-lts 6de38b5f6c2b 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 01:50 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/18 00:19 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/17 19:53 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/17 17:35 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/17 14:46 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2025/07/17 12:48 android13-5.10-lts 6de38b5f6c2b 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 BUG: workqueue lockup
2022/03/12 13:24 android12-5.10-lts e1b86e7f5cbb 9e8eaa75 .config console log report info ci2-android-5-10 BUG: workqueue lockup
* Struck through repros no longer work on HEAD.