panic: Sentry detected stuck tasks (36)

Status: fixed on 2026/09/18 11:33
Fix commit: 15e33efbdaee Do not present memory.current on the true root cgroup2 node
First crash: 29d, last: 6d04h
▶ ▼ Similar bugs (33)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
gvisor panic: Sentry detected stuck tasks (16) 2 5 1567d 1639d 14/26 fixed on 2022/06/10 10:13
gvisor panic: Sentry detected stuck tasks (9) 2 9 2035d 2035d 14/26 fixed on 2021/02/26 03:02
gvisor panic: Sentry detected stuck tasks (14) 2 20 1756d 1801d 14/26 fixed on 2021/12/02 12:02
gvisor panic: Sentry detected stuck tasks (17) 2 syz, C 822 1222d 1488d 26/26 fixed on 2023/05/19 14:28
gvisor panic: Sentry detected stuck tasks (12) 2 2 1833d 1832d 14/26 fixed on 2021/09/17 01:50
gvisor panic: Sentry detected stuck tasks (20) 2 syz, C 895 1131d 1134d 26/26 fixed on 2023/08/19 00:55
gvisor panic: Sentry detected stuck tasks 2 syz, C 506 2180d 2200d 0/26 fixed on 2020/10/03 12:41
gvisor panic: Sentry detected stuck tasks (6) 2 syz 714 2069d 2121d 14/26 fixed on 2021/01/22 19:49
gvisor panic: Sentry detected stuck tasks (7) 2 syz 2567 2037d 2069d 14/26 fixed on 2021/02/23 13:36
gvisor panic: Sentry detected stuck tasks (4) 2 syz, C 5 2135d 2135d 0/26 fixed on 2020/11/18 07:03
gvisor panic: Sentry detected stuck tasks (22) 2 5 1082d 1082d 26/26 fixed on 2023/10/07 05:04
gvisor panic: Sentry detected stuck tasks (8) 2 syz, C 64 2035d 2037d 14/26 fixed on 2021/02/25 13:46
gvisor panic: Sentry detected stuck tasks (13) 2 1 1831d 1831d 14/26 fixed on 2021/09/27 21:02
gvisor panic: Sentry detected stuck tasks (10) 2 syz, C 264 1982d 2034d 14/26 fixed on 2021/04/20 00:15
gvisor panic: Sentry detected stuck tasks (26) 2 syz, C 17 651d 652d 26/26 fixed on 2024/12/11 10:55
gvisor panic: Sentry detected stuck tasks (11) 2 syz, C 31 1848d 1975d 14/26 fixed on 2021/09/03 10:11
gvisor panic: Sentry detected stuck tasks (35) 2 syz 41 161d 214d 26/26 fixed on 2026/04/14 23:49
gvisor panic: Sentry detected stuck tasks (3) 2 syz, C 180 2135d 2139d 0/26 fixed on 2020/11/17 10:52
gvisor panic: Sentry detected stuck tasks (31) 2 3 370d 412d 26/26 fixed on 2025/09/19 06:07
gvisor panic: Sentry detected stuck tasks (28) 2 syz, C 11282 516d 620d 26/26 fixed on 2025/04/24 21:44
gvisor panic: Sentry detected stuck tasks (21) 2 64 1083d 1131d 26/26 fixed on 2023/10/05 23:05
gvisor panic: Sentry detected stuck tasks (2) 2 syz, C 951 2139d 2180d 0/26 fixed on 2020/11/13 09:22
gvisor panic: Sentry detected stuck tasks (5) 2 syz 83 2121d 2134d 0/26 fixed on 2020/12/01 11:18
gvisor panic: Sentry detected stuck tasks (33) 2 syz, C 13 308d 310d 26/26 fixed on 2025/11/19 02:01
gvisor panic: Sentry detected stuck tasks (27) 2 syz, C 14 628d 648d 26/26 fixed on 2025/01/07 21:12
gvisor panic: Sentry detected stuck tasks (32) 2 5 317d 355d 26/26 fixed on 2025/11/12 21:14
gvisor panic: Sentry detected stuck tasks (15) 2 syz, C 2582 1675d 1753d 14/26 fixed on 2022/02/25 14:00
gvisor panic: Sentry detected stuck tasks (34) 2 2 251d 258d 26/26 fixed on 2026/01/14 10:50
gvisor panic: Sentry detected stuck tasks (25) 2 syz, C 78 652d 681d 26/26 fixed on 2024/12/09 18:01
gvisor panic: Sentry detected stuck tasks (29) 2 syz, C 51 511d 515d 26/26 fixed on 2025/04/30 13:05
gvisor panic: Sentry detected stuck tasks (24) 2 syz, C 13 1070d 1076d 26/26 fixed on 2023/10/19 08:45
gvisor panic: Sentry detected stuck tasks (23) 2 syz, C 23 1076d 1081d 26/26 fixed on 2023/10/12 20:28
gvisor panic: Sentry detected stuck tasks (18) 2 syz, C 625 1163d 1222d 26/26 fixed on 2023/07/19 00:35

Sample crash report:
panic: Sentry detected 1 stuck task(s):
		Task tid: 25637 (goroutine 119819), entered RunSys state 3m12.63s 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 259 gp=0x34b55b300b40 m=34 mp=0x34b55b135808 [running]:
panic({0x1a8e100?, 0x34b55e90ef30?})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/go/src/runtime/panic.go:879 +0x16f fp=0x34b55e079bf0 sp=0x34b55e079b40 pc=0x48d0cf
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0x34b55c208c90?, 0x1dd919b?, 0x50?, 0x3b?, 0x34b55c208c90)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:394 +0x3d4 fp=0x34b55e079c80 sp=0x34b55e079bf0 pc=0x12dd054
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0x34b55abea100, 0x34b55c208c60, 0x1, {0x2f?})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:359 +0x485 fp=0x34b55e079e58 sp=0x34b55e079c80 pc=0x12dcb85
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0x34b55abea100)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:339 +0x733 fp=0x34b55e079f38 sp=0x34b55e079e58 pc=0x12dc573
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0x34b55abea100)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:273 +0xc5 fp=0x34b55e079fc8 sp=0x34b55e079f38 pc=0x12dbca5
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start.gowrap2()
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:203 +0x17 fp=0x34b55e079fe0 sp=0x34b55e079fc8 pc=0x12db637
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/go/src/runtime/asm_amd64.s:1771 +0x1 fp=0x34b55e079fe8 sp=0x34b55e079fe0 pc=0x495e61
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start in goroutine 1
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:203 +0x2f6

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/17 01:41 gvisor 901e954dacfd 95928915 .config console log report info ci-gvisor-systrap-1-cover panic: Sentry detected stuck tasks
2026/09/16 16:53 gvisor 88969d2e2fd3 b0e4c57e .config console log report info ci-gvisor-ptrace-1-cover panic: Sentry detected stuck tasks
2026/09/16 15:46 gvisor 88969d2e2fd3 b0e4c57e .config console log report info ci-gvisor-systrap-1-cover panic: Sentry detected stuck tasks
2026/09/16 04:39 gvisor 32d64686c131 12a0a44a .config console log report info ci-gvisor-systrap-1-cover panic: Sentry detected stuck tasks
2026/09/15 19:18 gvisor f2f951cb50be f41e228a .config console log report info ci-gvisor-ptrace-2-cover panic: Sentry detected stuck tasks
2026/09/15 16:45 gvisor f2f951cb50be f41e228a .config console log report info ci-gvisor-systrap-1-cover panic: Sentry detected stuck tasks
2026/08/25 00:09 gvisor 0b9499c9fb54 614e416a .config console log report info ci-gvisor-systrap-1-cover panic: Sentry detected stuck tasks
2026/08/24 22:35 gvisor 0b9499c9fb54 614e416a .config console log report info ci-gvisor-ptrace-3-cover panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.