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panic: Sentry detected stuck tasks (14)

Status: fixed on 2021/12/02 12:02
Reported-by: syzbot+b9610cff22c10d9bead4@syzkaller.appspotmail.com
Fix commit: b2f8b495ad73 cgroup/cpuset: handle the offset argument of write methods properly
First crash: 1597d, last: 1545d
▶ ▼ Similar bugs (31)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
gvisor panic: Sentry detected stuck tasks (16) 2 5 1356d 1428d 14/26 fixed on 2022/06/10 10:13
gvisor panic: Sentry detected stuck tasks (9) 2 9 1824d 1824d 14/26 fixed on 2021/02/26 03:02
gvisor panic: Sentry detected stuck tasks (17) 2 C 822 1011d 1277d 26/26 fixed on 2023/05/19 14:28
gvisor panic: Sentry detected stuck tasks (12) 2 2 1622d 1621d 14/26 fixed on 2021/09/17 01:50
gvisor panic: Sentry detected stuck tasks (20) 2 C 895 920d 923d 26/26 fixed on 2023/08/19 00:55
gvisor panic: Sentry detected stuck tasks 2 C 506 1969d 1989d 0/26 fixed on 2020/10/03 12:41
gvisor panic: Sentry detected stuck tasks (6) 2 syz 714 1858d 1910d 14/26 fixed on 2021/01/22 19:49
gvisor panic: Sentry detected stuck tasks (7) 2 syz 2567 1826d 1858d 14/26 fixed on 2021/02/23 13:36
gvisor panic: Sentry detected stuck tasks (4) 2 C 5 1924d 1924d 0/26 fixed on 2020/11/18 07:03
gvisor panic: Sentry detected stuck tasks (22) 2 5 871d 871d 26/26 fixed on 2023/10/07 05:04
gvisor panic: Sentry detected stuck tasks (8) 2 C 64 1824d 1826d 14/26 fixed on 2021/02/25 13:46
gvisor panic: Sentry detected stuck tasks (13) 2 1 1620d 1620d 14/26 fixed on 2021/09/27 21:02
gvisor panic: Sentry detected stuck tasks (10) 2 C 264 1771d 1823d 14/26 fixed on 2021/04/20 00:15
gvisor panic: Sentry detected stuck tasks (26) 2 C 17 440d 441d 26/26 fixed on 2024/12/11 10:55
gvisor panic: Sentry detected stuck tasks (11) 2 C 31 1637d 1764d 14/26 fixed on 2021/09/03 10:11
gvisor panic: Sentry detected stuck tasks (3) 2 C 180 1924d 1928d 0/26 fixed on 2020/11/17 10:52
gvisor panic: Sentry detected stuck tasks (31) 2 3 159d 201d 26/26 fixed on 2025/09/19 06:07
gvisor panic: Sentry detected stuck tasks (28) 2 C 11282 305d 409d 26/26 fixed on 2025/04/24 21:44
gvisor panic: Sentry detected stuck tasks (21) 2 64 872d 920d 26/26 fixed on 2023/10/05 23:05
gvisor panic: Sentry detected stuck tasks (2) 2 C 951 1928d 1969d 0/26 fixed on 2020/11/13 09:22
gvisor panic: Sentry detected stuck tasks (5) 2 syz 83 1910d 1923d 0/26 fixed on 2020/12/01 11:18
gvisor panic: Sentry detected stuck tasks (33) 2 C 13 97d 99d 26/26 fixed on 2025/11/19 02:01
gvisor panic: Sentry detected stuck tasks (27) 2 C 14 417d 437d 26/26 fixed on 2025/01/07 21:12
gvisor panic: Sentry detected stuck tasks (32) 2 5 106d 144d 26/26 fixed on 2025/11/12 21:14
gvisor panic: Sentry detected stuck tasks (15) 2 C 2582 1464d 1542d 14/26 fixed on 2022/02/25 14:00
gvisor panic: Sentry detected stuck tasks (34) 2 2 40d 47d 26/26 fixed on 2026/01/14 10:50
gvisor panic: Sentry detected stuck tasks (25) 2 C 78 441d 470d 26/26 fixed on 2024/12/09 18:01
gvisor panic: Sentry detected stuck tasks (29) 2 C 51 300d 304d 26/26 fixed on 2025/04/30 13:05
gvisor panic: Sentry detected stuck tasks (24) 2 C 13 859d 865d 26/26 fixed on 2023/10/19 08:45
gvisor panic: Sentry detected stuck tasks (23) 2 C 23 865d 870d 26/26 fixed on 2023/10/12 20:28
gvisor panic: Sentry detected stuck tasks (18) 2 C 625 952d 1011d 26/26 fixed on 2023/07/19 00:35

Sample crash report:
panic: Sentry detected 2 stuck task(s):
	Task tid: 2064 (goroutine 26607), entered RunSys state 3m29.34s ago.
	Task tid: 2059 (goroutine 26147), entered RunSys state 3m29.34s ago.
Search for 'goroutine <id>' in the stack dump to find the offending goroutine(s)
Stack for running G's are skipped while panicking.

goroutine 243 [running]:
panic(0x1a3cb80, 0xc1050eb410)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc00611fb80 sp=0xc00611fab8 pc=0x43a6c5
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0xc0001c8480, 0x1, 0x1, 0xc00611fd28)
	pkg/sentry/watchdog/watchdog.go:443 +0x82d fp=0xc00611fc98 sp=0xc00611fb80 pc=0x11d612d
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc0001c8480, 0xc105d72ba0, 0x1, 0x6f5d331a400)
	pkg/sentry/watchdog/watchdog.go:391 +0x478 fp=0xc00611fdf0 sp=0xc00611fc98 pc=0x11d57f8
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc0001c8480)
	pkg/sentry/watchdog/watchdog.go:369 +0x95a fp=0xc00611ff38 sp=0xc00611fdf0 pc=0x11d527a
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc0001c8480)
	pkg/sentry/watchdog/watchdog.go:289 +0x88 fp=0xc00611ffd8 sp=0xc00611ff38 pc=0x11d4788
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc00611ffe0 sp=0xc00611ffd8 pc=0x477541
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start
	pkg/sentry/watchdog/watchdog.go:228 +0x3ea

Crashes (20):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/12/01 21:38 gvisor 72e222cd6614 61f86278 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/12/01 13:43 gvisor 72e222cd6614 5fa3eacc .config console log report info ci-gvisor-ptrace-3-race panic: Sentry detected stuck tasks
2021/11/30 23:35 gvisor afd549d79c50 80270552 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/30 14:16 gvisor afd549d79c50 80270552 .config console log report info ci-gvisor-ptrace-3-cover panic: Sentry detected stuck tasks
2021/11/28 19:50 gvisor 5e984d5aa2c3 63eeac02 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/25 21:10 gvisor 5e984d5aa2c3 63eeac02 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/24 17:58 gvisor 5e984d5aa2c3 545ab074 .config console log report info ci-gvisor-ptrace-3-cover panic: Sentry detected stuck tasks
2021/11/22 17:13 gvisor 0fd9b69d5ccd 545ab074 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/22 06:28 gvisor 0fd9b69d5ccd 4eb20a4e .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/21 21:18 gvisor 0fd9b69d5ccd 4eb20a4e .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/21 09:16 gvisor 0fd9b69d5ccd 4eb20a4e .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/18 23:24 gvisor f1a46c928f82 31a30fc0 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/14 22:13 gvisor 2857afc5e4ec 83f5c9b5 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/14 17:02 gvisor 2857afc5e4ec 83f5c9b5 .config console log report info ci-gvisor-ptrace-2-race-cover panic: Sentry detected stuck tasks
2021/11/09 06:16 gvisor 84b38f4c6e06 8ab17e57 .config console log report info ci-gvisor-ptrace-3-race-cover panic: Sentry detected stuck tasks
2021/11/06 19:52 gvisor ce4f4283badb 4c1be0be .config console log report info ci-gvisor-ptrace-3-cover panic: Sentry detected stuck tasks
2021/11/05 19:14 gvisor 822a647018ad 4c1be0be .config console log report info ci-gvisor-ptrace-3-race-cover panic: Sentry detected stuck tasks
2021/10/12 00:36 gvisor 09a42f997640 838e7e2c .config console log report info ci-gvisor-ptrace-3-race-cover panic: Sentry detected stuck tasks
2021/10/10 08:31 gvisor 3f1642e4bc86 838e7e2c .config console log report info ci-gvisor-ptrace-3-race-cover panic: Sentry detected stuck tasks
2021/10/10 08:31 gvisor 3f1642e4bc86 838e7e2c .config console log report info ci-gvisor-ptrace-3-race-cover panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.