BUG: workqueue lockup

Status: upstream: reported C repro on 2019/04/29 11:26
Reported-by: syzbot+ca2bcb4480e72cbbaff8@syzkaller.appspotmail.com
First crash: 2653d, last: 1251d
▶ ▼ Similar bugs (16)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: workqueue lockup (4) block -1 syz, C 47 2451d 2857d 15/29 fixed on 2019/12/13 00:31
linux-5.15 BUG: workqueue lockup missing-backport origin:upstream -1 syz, C done 642 14h34m 1241d 0/3 upstream: reported C repro on 2023/03/11 08:51
android-5-15 BUG: workqueue lockup origin:upstream missing-backport -1 syz, C error 8329 26m 1138d 0/2 upstream: reported C repro on 2023/06/22 22:19
upstream BUG: workqueue lockup (2) -1 syz, C 406 3007d 3165d 5/29 fixed on 2018/05/13 10:02
upstream BUG: workqueue lockup -1 syz, C 172 3188d 3198d 3/29 fixed on 2017/11/11 01:37
upstream BUG: workqueue lockup (5) prio:low wireguard arm 1 syz, C done 17138 2h08m 2393d 0/29 upstream: reported C repro on 2020/01/14 22:04
android-5-10 BUG: workqueue lockup (2) -1 syz, C error 16937 now 1247d 0/2 upstream: reported C repro on 2023/03/05 21:10
upstream BUG: workqueue lockup (3) -1 syz, C 1215 2951d 3004d 8/29 fixed on 2018/07/09 18:05
android-6-1 BUG: workqueue lockup origin:upstream missing-backport -1 syz, C error 7844 2h34m 1107d 0/2 upstream: reported C repro on 2023/07/23 17:25
linux-6.6 BUG: workqueue lockup origin:upstream -1 syz, C error 58 3d08h 413d 0/2 upstream: reported C repro on 2025/06/17 05:08
android-414 BUG: workqueue lockup -1 syz, C 114 2516d 2672d 0/1 public: reported C repro on 2019/04/11 00:00
linux-4.19 BUG: workqueue lockup -1 syz, C error 41 1246d 2660d 0/1 upstream: reported C repro on 2019/04/22 20:37
android-5-10 BUG: workqueue lockup -1 syz, C error 25 1646d 1744d 0/2 closed as invalid on 2022/02/22 17:18
android-49 BUG: workqueue lockup -1 syz, C 69 2440d 2671d 0/3 public: reported C repro on 2019/04/11 08:44
android-6-12 BUG: workqueue lockup -1 1 381d 381d 0/1 auto-obsoleted due to no activity on 2025/10/16 16:41
linux-6.1 BUG: workqueue lockup origin:upstream missing-backport -1 syz, C unreliable 613 1d01h 1245d 0/3 upstream: reported C repro on 2023/03/07 17:51
▶ ▼ Fix bisection attempts (4)
Created Duration User Patch Repo Result
2023/02/03 09:18 36m bisect fix linux-4.14.y OK (0) job log log
2021/11/29 15:45 26m bisect fix linux-4.14.y OK (0) job log log
2021/09/10 06:06 23m bisect fix linux-4.14.y OK (0) job log log
2021/07/13 19:34 37m bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 261s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
    in-flight: 4626:rtc_timer_do_work
    pending: cache_reap, push_to_pool
workqueue events_freezable: flags=0x4
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: update_balloon_stats_func
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
    pending: fb_flashcursor, neigh_periodic_work, sync_cmos_clock
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
workqueue ipv6_addrconf: flags=0x40008
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2
    pending: addrconf_verify_work
pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=261s workers=2 idle: 23

Crashes (282):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/05/24 05:28 linux-4.14.y dffb5c6ff09c e7f9308d .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/08/11 06:06 linux-4.14.y 46914f96189b 6972b106 .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/08/07 22:36 linux-4.14.y 94cb1fed447a 6972b106 .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/08/03 06:34 linux-4.14.y ce4d1565392b 6c236867 .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/04/12 10:03 linux-4.14.y 958e517f4e16 6a81331a .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/04/06 13:10 linux-4.14.y bd634aa64163 6a81331a .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/04/06 11:27 linux-4.14.y bd634aa64163 6a81331a .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/02/09 07:31 linux-4.14.y 2c8a3fceddf0 2bd9619f .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/01/18 07:27 linux-4.14.y 2762b48e9611 fd103621 .config console log report syz C ci2-linux-4-14 BUG: workqueue lockup
2021/01/15 22:07 linux-4.14.y f79dc86058bc 65a7a854 .config console log report syz C ci2-linux-4-14
2021/01/15 10:08 linux-4.14.y f79dc86058bc 65a7a854 .config console log report syz C ci2-linux-4-14
2021/01/13 07:23 linux-4.14.y f79dc86058bc 0cdd6185 .config console log report syz C ci2-linux-4-14
2021/01/09 00:53 linux-4.14.y 1752938529c6 c104d4a3 .config console log report syz C ci2-linux-4-14
2021/01/07 15:02 linux-4.14.y 1752938529c6 c104d4a3 .config console log report syz C ci2-linux-4-14
2020/12/19 15:36 linux-4.14.y 3f2ecb86cb90 04201c06 .config console log report syz C ci2-linux-4-14
2020/03/01 15:07 linux-4.14.y 78d697fc93f9 c88c7b75 .config console log report syz C ci2-linux-4-14
2022/02/12 19:56 linux-4.14.y 8034e99d1a01 8b9ca619 .config console log report syz ci2-linux-4-14 BUG: workqueue lockup
2021/03/04 11:08 linux-4.14.y 397a88b2cc86 d7e4e604 .config console log report syz ci2-linux-4-14 BUG: workqueue lockup
2021/01/13 19:27 linux-4.14.y f79dc86058bc a945f0a3 .config console log report syz ci2-linux-4-14
2020/12/31 13:44 linux-4.14.y 1752938529c6 5cc121d6 .config console log report syz ci2-linux-4-14
2023/03/01 06:16 linux-4.14.y 7878a41b6cc1 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/02/21 15:11 linux-4.14.y a8ad60f2af58 f949448d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/02/17 07:01 linux-4.14.y a8ad60f2af58 851bc19a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/02/13 00:14 linux-4.14.y a8ad60f2af58 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/02/12 10:44 linux-4.14.y a8ad60f2af58 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/02/10 20:00 linux-4.14.y a8ad60f2af58 e29a17f5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/02/04 15:36 linux-4.14.y 3949d1610004 be607b78 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2023/01/03 17:19 linux-4.14.y c4215ee4771b f0036e18 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/12/08 16:04 linux-4.14.y 65afe34ac33d 1034e5fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/12/08 08:10 linux-4.14.y 179ef7fe8677 d88f3abb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/12/04 17:52 linux-4.14.y 179ef7fe8677 e080de16 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/11/13 07:56 linux-4.14.y e911713e40ca f42ee5d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/11/12 19:58 linux-4.14.y e911713e40ca f42ee5d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/11/01 10:51 linux-4.14.y 41f36d7859a7 a1d8560a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-4-14 BUG: workqueue lockup
2022/10/08 23:40 linux-4.14.y 9d5c0b3a8e1a aea5da89 .config console log report info [disk image] [vmlinux] ci2-linux-4-14 BUG: workqueue lockup
2022/10/01 04:09 linux-4.14.y 9d5c0b3a8e1a feb56351 .config console log report info [disk image] [vmlinux] ci2-linux-4-14 BUG: workqueue lockup
2022/09/17 23:35 linux-4.14.y 5df8b4735177 dd9a85ff .config console log report info [disk image] [vmlinux] ci2-linux-4-14 BUG: workqueue lockup
2022/09/10 17:15 linux-4.14.y 65640c873dcf 356d8217 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/09/02 21:02 linux-4.14.y e548869f356f 25194605 .config console log report info [disk image] [vmlinux] ci2-linux-4-14 BUG: workqueue lockup
2022/08/29 15:26 linux-4.14.y e548869f356f d7593c58 .config console log report info [disk image] [vmlinux] ci2-linux-4-14 BUG: workqueue lockup
2022/08/23 16:55 linux-4.14.y b641242202ed cea8b0f7 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/08/23 06:35 linux-4.14.y b641242202ed 26a13b38 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/08/11 03:34 linux-4.14.y b641242202ed a6201f11 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/08/04 16:59 linux-4.14.y b641242202ed 1c9013ac .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/07/16 07:19 linux-4.14.y 424a46ea058e 95cb00d1 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/07/15 17:02 linux-4.14.y 424a46ea058e 5d921b08 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/07/15 01:37 linux-4.14.y 424a46ea058e 5d921b08 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/07/14 09:26 linux-4.14.y 424a46ea058e 5d921b08 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/07/06 10:43 linux-4.14.y ed2e96e11936 bff65f44 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/07/06 01:26 linux-4.14.y ed2e96e11936 bff65f44 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/06/22 16:12 linux-4.14.y 84bae26850e3 912f5df7 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/06/09 01:27 linux-4.14.y b8f3be299d51 0d5abf15 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/06/05 08:30 linux-4.14.y 501eec4f9e13 c8857892 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/05/24 00:23 linux-4.14.y dffb5c6ff09c e7f9308d .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/05/20 15:12 linux-4.14.y dffb5c6ff09c cb1ac2e7 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/05/04 19:48 linux-4.14.y e3a56aaade89 dc9e5259 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/04/16 18:11 linux-4.14.y 74766a973637 8bcc32a6 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/04/08 13:07 linux-4.14.y 74766a973637 c6ff3e05 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/03/28 05:16 linux-4.14.y 004bfaafc45c 89bc8608 .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/03/21 07:00 linux-4.14.y eb045674aab3 e2d91b1d .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/03/20 03:29 linux-4.14.y eb045674aab3 e2d91b1d .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/03/17 19:08 linux-4.14.y eb045674aab3 dfa9a8ed .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2022/03/07 22:43 linux-4.14.y e853993d29aa 7bdd8b2c .config console log report info ci2-linux-4-14 BUG: workqueue lockup
2021/01/17 04:06 linux-4.14.y f79dc86058bc 65a7a854 .config console log report info ci2-linux-4-14
2019/04/29 10:25 linux-4.14.y fa5941f45d7e b617407b .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.