BUG: workqueue lockup

Status: upstream: reported C repro on 2019/04/22 20:37
Reported-by: syzbot+07af6c37cf925e122259@syzkaller.appspotmail.com
First crash: 2667d, last: 1253d
Fix 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 syz, C 47 2458d 2865d 15/29 fixed on 2019/12/13 00:31
linux-5.15 BUG: workqueue lockup missing-backport origin:upstream -1 syz, C done 642 8d02h 1249d 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 8355 19m 1145d 0/2 upstream: reported C repro on 2023/06/22 22:19
upstream BUG: workqueue lockup (2) -1 syz, C 406 3015d 3173d 5/29 fixed on 2018/05/13 10:02
linux-4.14 BUG: workqueue lockup -1 syz, C 282 1259d 2661d 0/1 upstream: reported C repro on 2019/04/29 11:26
upstream BUG: workqueue lockup -1 syz, C 172 3195d 3206d 3/29 fixed on 2017/11/11 01:37
upstream BUG: workqueue lockup (5) prio:low wireguard arm 1 syz, C done 17245 2h05m 2400d 0/29 upstream: reported C repro on 2020/01/14 22:04
android-5-10 BUG: workqueue lockup (2) -1 syz, C error 16964 14m 1254d 0/2 upstream: reported C repro on 2023/03/05 21:10
upstream BUG: workqueue lockup (3) -1 syz, C 1215 2959d 3011d 8/29 fixed on 2018/07/09 18:05
android-6-1 BUG: workqueue lockup origin:upstream missing-backport -1 syz, C error 7887 4h56m 1115d 0/2 upstream: reported C repro on 2023/07/23 17:25
linux-6.6 BUG: workqueue lockup origin:upstream -1 syz, C error 59 6d07h 420d 0/2 upstream: reported C repro on 2025/06/17 05:08
android-414 BUG: workqueue lockup -1 syz, C 114 2523d 2679d 0/1 public: reported C repro on 2019/04/11 00:00
android-5-10 BUG: workqueue lockup -1 syz, C error 25 1653d 1752d 0/2 closed as invalid on 2022/02/22 17:18
android-49 BUG: workqueue lockup -1 syz, C 69 2447d 2679d 0/3 public: reported C repro on 2019/04/11 08:44
android-6-12 BUG: workqueue lockup -1 1 389d 389d 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 619 1d06h 1253d 0/3 upstream: reported C repro on 2023/03/07 17:51
▶ ▼ Fix bisection attempts (14)
Created Duration User Patch Repo Result
2022/01/11 03:29 16m bisect fix linux-4.19.y error job log
2021/09/18 19:49 33m bisect fix linux-4.19.y OK (0) job log log
2021/07/18 19:08 37m bisect fix linux-4.19.y OK (0) job log log
2021/06/18 18:36 28m bisect fix linux-4.19.y OK (0) job log log
2021/05/19 18:07 29m bisect fix linux-4.19.y OK (0) job log log
2021/02/01 01:03 2m bisect fix linux-4.19.y error job log
2021/01/02 00:30 27m bisect fix linux-4.19.y OK (0) job log log
2020/12/02 22:15 37m bisect fix linux-4.19.y OK (0) job log log
2020/11/02 21:45 29m bisect fix linux-4.19.y OK (0) job log log
2020/10/03 21:15 29m bisect fix linux-4.19.y OK (0) job log log
2020/09/03 19:42 31m bisect fix linux-4.19.y OK (0) job log log
2020/08/04 19:12 29m bisect fix linux-4.19.y OK (0) job log log
2020/04/11 12:08 29m bisect fix linux-4.19.y OK (0) job log log
2019/12/26 02:48 32m bisect fix linux-4.19.y OK (0) job log log

Sample crash report:
BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 149s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=7/256 refcnt=8
    in-flight: 14:ipvlan_process_multicast
    pending: cache_reap, macvlan_process_broadcast, delayed_fput, ipvlan_process_multicast, vmstat_shepherd, push_to_pool
workqueue events_freezable: flags=0x4
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: update_balloon_stats_func
workqueue events_power_efficient: flags=0x80
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256 refcnt=5
    pending: do_cache_clean, neigh_periodic_work, fb_flashcursor, check_lifetime
workqueue mm_percpu_wq: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
workqueue cgroup_destroy: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=4
    in-flight: 8295:css_free_rwork_fn
    delayed: css_release_work_fn, css_release_work_fn
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 refcnt=4
    pending: css_killed_work_fn
    delayed: css_killed_work_fn, css_release_work_fn
workqueue cgroup_pidlist_destroy: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 refcnt=2
    pending: cgroup_pidlist_destroy_work_fn
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 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=5
    in-flight: 3461:addrconf_dad_work
    delayed: addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 refcnt=76
    pending: addrconf_dad_work
    delayed: addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_verify_work
pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=149s workers=5 idle: 8219 8294 8296 7821
pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=4 idle: 8297 19
nla_parse: 27 callbacks suppressed
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
nla_parse: 29 callbacks suppressed
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor595'.

Crashes (41):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/05 01:42 linux-4.19.y 6ca2f514c578 b97d64c9 .config console log report syz C ci2-linux-4-19 BUG: workqueue lockup
2020/03/12 12:08 linux-4.19.y 569209711609 d850e9d0 .config console log report syz C ci2-linux-4-19
2020/03/08 16:45 linux-4.19.y 7472c4028e23 2e9971bb .config console log report syz C ci2-linux-4-19
2019/04/22 19:36 linux-4.19.y c98875d930e9 0a77c33c .config console log report syz C ci2-linux-4-19
2021/04/19 18:07 linux-4.19.y 2965db2e004c 50f523d7 .config console log report syz ci2-linux-4-19 BUG: workqueue lockup
2021/04/15 08:15 linux-4.19.y 0f1b4cb77d7f fcdb12ba .config console log report syz ci2-linux-4-19 BUG: workqueue lockup
2021/04/04 13:52 linux-4.19.y 2034d6f0838e 6a81331a .config console log report syz ci2-linux-4-19 BUG: workqueue lockup
2021/04/03 04:52 linux-4.19.y 2034d6f0838e 6a81331a .config console log report syz ci2-linux-4-19 BUG: workqueue lockup
2020/07/05 19:12 linux-4.19.y 399849e4654e 22f87567 .config console log report syz ci2-linux-4-19
2023/03/06 23:57 linux-4.19.y 3f8a27f9e27b f8902b57 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2023/02/21 05:44 linux-4.19.y 3f8a27f9e27b 2414209c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2023/02/15 22:46 linux-4.19.y 3f8a27f9e27b 6be0f1f5 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2023/01/07 11:59 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2022/11/14 20:54 linux-4.19.y 3f8a27f9e27b 943f4cb8 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2022/11/14 18:23 linux-4.19.y 3f8a27f9e27b 943f4cb8 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2022/11/04 12:57 linux-4.19.y 3f8a27f9e27b 6d752409 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 BUG: workqueue lockup
2022/09/09 21:34 linux-4.19.y 3f8a27f9e27b 90058bdc .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2022/03/31 12:45 linux-4.19.y 3f8a27f9e27b c4c32d8c .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2022/03/31 11:55 linux-4.19.y 3f8a27f9e27b c4c32d8c .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2022/01/13 03:59 linux-4.19.y 3f8a27f9e27b 44d1319a .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/12/12 03:28 linux-4.19.y 3f8a27f9e27b 49ca1f59 .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/11/13 06:17 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/10/17 16:35 linux-4.19.y 3f8a27f9e27b 0c5d9412 .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/10/06 16:16 linux-4.19.y 6db10b4d5efd 0a63fd36 .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/10/05 12:39 linux-4.19.y c2276d585654 8a6b1a8d .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/10/01 22:26 linux-4.19.y c2276d585654 cc80db95 .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/08/19 19:49 linux-4.19.y 59456c9cc40c e2da378b .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/03/11 03:45 linux-4.19.y 2cae3e25b706 c2ca1f2a .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/02/11 10:31 linux-4.19.y 811218eceeaa a52ee10a .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2021/02/09 06:59 linux-4.19.y 811218eceeaa 2bd9619f .config console log report info ci2-linux-4-19 BUG: workqueue lockup
2020/06/18 20:09 linux-4.19.y 3fc898571b97 3ea11d3f .config console log report ci2-linux-4-19
2020/05/22 01:22 linux-4.19.y 1bab61d3e8cd 4afdfa20 .config console log report ci2-linux-4-19
2020/05/08 17:03 linux-4.19.y 84920cc7fbe1 fe4122c3 .config console log report ci2-linux-4-19
2020/02/07 20:01 linux-4.19.y b499cf4b3a90 06150bf1 .config console log report ci2-linux-4-19
2020/01/12 19:14 linux-4.19.y dcd888983542 31290a45 .config console log report ci2-linux-4-19
2019/12/30 14:59 linux-4.19.y 672481c2deff af6b8ef8 .config console log report ci2-linux-4-19
2019/12/26 20:30 linux-4.19.y 672481c2deff be5c2c81 .config console log report ci2-linux-4-19
2019/11/26 02:48 linux-4.19.y 14260788bbb9 598ca6c8 .config console log report ci2-linux-4-19
2019/11/14 08:55 linux-4.19.y c555efaf1402 048f2d49 .config console log report ci2-linux-4-19
2019/07/02 09:59 linux-4.19.y aec3002d07fd cccc4302 .config console log report ci2-linux-4-19
2019/04/24 09:56 linux-4.19.y c98875d930e9 8e3c52b1 .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.