syzbot


BUG: workqueue lockup (2)

Status: fixed on 2018/05/13 10:02
Reported-by: syzbot+e38be687a2450270a3b593bacb6b5795a7a74edb@syzkaller.appspotmail.com
Fix commit: 966031f34018 n_tty: fix EXTPROC vs ICANON interaction with TIOCINQ (aka FIONREAD)
First crash: 2300d, last: 2119d
Similar bugs (14)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: workqueue lockup (4) block C 47 1563d 1969d 15/26 fixed on 2019/12/13 00:31
linux-5.15 BUG: workqueue lockup origin:upstream C 119 17h42m 353d 0/3 upstream: reported C repro on 2023/03/11 08:51
android-5-15 BUG: workqueue lockup origin:upstream missing-backport C error 214 9h52m 250d 0/2 upstream: reported C repro on 2023/06/22 22:19
linux-4.14 BUG: workqueue lockup C 282 364d 1765d 0/1 upstream: reported C repro on 2019/04/29 11:26
upstream BUG: workqueue lockup C 172 2300d 2310d 3/26 fixed on 2017/11/11 01:37
upstream BUG: workqueue lockup (5) kernel C done 3498 2h43m 1505d 0/26 upstream: reported C repro on 2020/01/14 22:04
android-5-10 BUG: workqueue lockup (2) C error 312 6h53m 359d 0/2 upstream: reported C repro on 2023/03/05 21:10
upstream BUG: workqueue lockup (3) C 1215 2063d 2116d 8/26 fixed on 2018/07/09 18:05
android-6-1 BUG: workqueue lockup origin:upstream C error 141 4d12h 219d 0/2 upstream: reported C repro on 2023/07/23 17:25
android-414 BUG: workqueue lockup C 114 1628d 1784d 0/1 public: reported C repro on 2019/04/11 00:00
linux-4.19 BUG: workqueue lockup C error 41 358d 1772d 0/1 upstream: reported C repro on 2019/04/22 20:37
android-5-10 BUG: workqueue lockup C error 25 758d 856d 0/2 closed as invalid on 2022/02/22 17:18
android-49 BUG: workqueue lockup C 69 1552d 1783d 0/3 public: reported C repro on 2019/04/11 08:44
linux-6.1 BUG: workqueue lockup origin:upstream C 76 3d06h 357d 0/3 upstream: reported C repro on 2023/03/07 17:51

Sample crash report:
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 37s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 32s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: cache_reap
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
    pending: neigh_periodic_work, do_cache_clean
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
workqueue kblockd: flags=0x18
  pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256
    pending: blk_timeout_work

Crashes (406):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2017/12/17 19:19 upstream f3b5ad89de16 d5beb42a .config console log report syz C ci-upstream-kasan-gce
2017/12/17 14:33 upstream f3b5ad89de16 d5beb42a .config console log report syz ci-upstream-kasan-gce-386
2017/12/23 17:15 linux-next 0e08c463db38 73aba437 .config console log report syz ci-upstream-next-kasan-gce
2017/12/22 16:05 linux-next 0e08c463db38 81fe66b4 .config console log report syz ci-upstream-next-kasan-gce
2017/12/17 13:53 linux-next 6084b576dca2 d5beb42a .config console log report syz ci-upstream-next-kasan-gce
2018/05/10 17:24 upstream 008464a9360e 12c7428a .config console log report ci-upstream-kasan-gce-root
2018/05/06 16:12 upstream ee946c36be21 6c18ddb0 .config console log report ci-upstream-kasan-gce
2018/05/04 19:38 upstream 150426981426 9ce14f4b .config console log report ci-upstream-kasan-gce-root
2018/05/03 18:57 upstream f4ef6a438cee 9ce14f4b .config console log report ci-upstream-kasan-gce-root
2018/05/03 17:56 upstream f4ef6a438cee 9ce14f4b .config console log report ci-upstream-kasan-gce-root
2018/05/03 03:33 upstream 2d618bdf7163 d5b114b4 .config console log report ci-upstream-kasan-gce-root
2018/05/01 16:48 upstream fff75eb2a08c d5b114b4 .config console log report ci-upstream-kasan-gce
2018/04/27 16:25 upstream 0644f186fc9d 7785e404 .config console log report ci-upstream-kasan-gce-root
2018/04/19 01:35 upstream a27fc14219f2 829f0234 .config console log report ci-upstream-kasan-gce-root
2018/04/16 23:34 upstream a27fc14219f2 b80fd3b5 .config console log report ci-upstream-kasan-gce-root
2018/04/16 18:40 upstream 60cc43fc8884 802ac912 .config console log report ci-upstream-kasan-gce-root
2018/04/11 15:15 upstream b284d4d5a678 8b8de427 .config console log report ci-upstream-kasan-gce-root
2018/04/11 03:00 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce
2018/04/11 00:16 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce
2018/04/10 22:02 upstream c18bb396d3d2 8b8de427 .config console log report ci-upstream-kasan-gce
2018/04/10 13:34 upstream c18bb396d3d2 8e873e9d .config console log report ci-upstream-kasan-gce-root
2018/04/10 04:51 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/10 03:37 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/10 01:55 upstream fd40ffc72e2f b9f65507 .config console log report ci-upstream-kasan-gce-root
2018/04/09 19:10 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce-root
2018/04/09 17:00 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce
2018/04/09 13:52 upstream 3fd14cdcc05a f13fb445 .config console log report ci-upstream-kasan-gce
2018/04/09 03:01 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/09 00:33 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/04/08 22:45 upstream 3fd14cdcc05a 77bd5117 .config console log report ci-upstream-kasan-gce
2018/03/28 00:00 upstream 3eb2ce825ea1 bf5e585c .config console log report ci-upstream-kasan-gce-386
2018/05/10 08:24 bpf-next ea7e3435297c 12c7428a .config console log report ci-upstream-bpf-next-kasan-gce
2018/05/10 04:01 bpf-next ea7e3435297c 12c7428a .config console log report ci-upstream-bpf-next-kasan-gce
2018/05/09 16:13 bpf-next 53a7bdfb2a27 12c7428a .config console log report ci-upstream-bpf-next-kasan-gce
2018/05/04 23:36 bpf-next e94fa1d93117 9ce14f4b .config console log report ci-upstream-bpf-next-kasan-gce
2018/05/04 22:19 bpf-next 5234ccf2be0e 9ce14f4b .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/24 07:30 bpf-next fbcf93ebcaef e7e85d36 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/23 16:57 bpf-next 48d7a07ba355 0d8e591c .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/23 02:34 bpf-next 878a4d328104 d23fcf6c .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/22 17:11 bpf-next 878a4d328104 d23fcf6c .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/21 04:05 bpf-next 878a4d328104 ca03d688 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/20 19:43 bpf-next 878a4d328104 cc402841 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/20 15:23 bpf-next 878a4d328104 cc402841 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/18 11:55 bpf-next a2d481b326c9 52643b44 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/17 19:02 bpf-next 5d1365940a68 b80fd3b5 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/17 14:14 bpf-next 5d1365940a68 b80fd3b5 .config console log report ci-upstream-bpf-next-kasan-gce
2018/04/17 01:31 bpf-next 5d1365940a68 b80fd3b5 .config console log report ci-upstream-bpf-next-kasan-gce
2018/03/26 05:45 net-next-old 74b4bed972ac e033c1f1 .config console log report ci-upstream-net-kasan-gce
2018/01/16 05:59 mmots ce3c209f6733 e17f4a5d .config console log report ci-upstream-mmots-kasan-gce
2018/01/03 18:44 linux-next 73005e1a35fd 00193447 .config console log report ci-upstream-next-kasan-gce
* Struck through repros no longer work on HEAD.