kvm: panic: Sentry detected stuck tasks (29)

Status: fixed on 2025/11/19 02:01
Fix commit: 2d94e669ae96 Avoid netlink deadlock
First crash: 310d, last: 309d
▶ ▼ Similar bugs (28)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
gvisor kvm: panic: Sentry detected stuck tasks (2) -1 syz, C 66 1830d 1993d 14/26 fixed on 2021/09/25 08:25
gvisor kvm: panic: Sentry detected stuck tasks (26) -1 syz, C 3 514d 515d 0/26 closed as invalid on 2025/04/25 22:43
gvisor kvm: panic: Sentry detected stuck tasks (7) -1 1 1584d 1577d 14/26 fixed on 2022/06/09 21:04
gvisor kvm: panic: Sentry detected stuck tasks (19) -1 3 1043d 1042d 26/26 fixed on 2023/11/15 20:33
gvisor kvm: panic: Sentry detected stuck tasks (23) -1 1 916d 916d 0/26 auto-obsoleted due to no activity on 2024/06/25 13:36
gvisor kvm: panic: Sentry detected stuck tasks -1 syz, C 152 2007d 2023d 14/26 fixed on 2021/03/24 13:21
gvisor kvm: panic: Sentry detected stuck tasks (24) -1 syz, C 9 650d 693d 26/26 fixed on 2024/12/11 10:55
gvisor kvm: panic: Sentry detected stuck tasks (6) -1 15 1666d 1676d 14/26 fixed on 2022/03/01 23:36
gvisor kvm: panic: Sentry detected stuck tasks (18) -1 syz, C 3 1055d 1060d 26/26 fixed on 2023/11/03 12:12
gvisor kvm: panic: Sentry detected stuck tasks (4) -1 syz, C 627 1746d 1774d 14/26 fixed on 2021/12/10 13:30
gvisor kvm: panic: Sentry detected stuck tasks (27) -1 syz, C 5 512d 513d 26/26 fixed on 2025/05/02 08:36
gvisor kvm: panic: Sentry detected stuck tasks (10) -1 3 1407d 1425d 14/26 fixed on 2022/11/30 11:09
gvisor kvm: panic: Sentry detected stuck tasks (22) -1 syz, C 8 1022d 1032d 26/26 fixed on 2023/12/12 09:56
gvisor kvm: panic: Sentry detected stuck tasks (8) -1 1 1502d 1502d 0/26 closed as invalid on 2022/08/11 16:05
gvisor kvm: panic: Sentry detected stuck tasks (11) -1 1 1389d 1389d 0/26 closed as invalid on 2022/12/05 18:51
gvisor kvm: panic: Sentry detected stuck tasks (21) -1 syz, C 2 1037d 1038d 26/26 fixed on 2023/11/21 23:47
gvisor kvm: panic: Sentry detected stuck tasks (15) -1 syz, C 186 1131d 1134d 26/26 fixed on 2023/08/19 00:49
gvisor kvm: panic: Sentry detected stuck tasks (31) -1 1 5d08h 4d16h 26/26 fixed on 2026/09/17 23:32
gvisor kvm: panic: Sentry detected stuck tasks (28) -1 syz, C 11 462d 467d 26/26 fixed on 2025/07/10 09:16
gvisor kvm: panic: Sentry detected stuck tasks (20) -1 syz, C 2 1041d 1041d 26/26 fixed on 2023/11/17 11:27
gvisor kvm: panic: Sentry detected stuck tasks (5) -1 syz, C 65 1677d 1739d 14/26 fixed on 2022/02/18 08:00
gvisor kvm: panic: Sentry detected stuck tasks (25) -1 syz, C 3409 523d 619d 26/26 fixed on 2025/04/24 21:45
gvisor kvm: panic: Sentry detected stuck tasks (9) -1 2 1473d 1475d 14/26 fixed on 2022/09/20 07:30
gvisor kvm: panic: Sentry detected stuck tasks (3) -1 1 1792d 1791d 0/26 closed as invalid on 2021/10/27 19:47
gvisor kvm: panic: Sentry detected stuck tasks (30) -1 syz, C 15 160d 197d 26/26 fixed on 2026/09/01 02:28
gvisor kvm: panic: Sentry detected stuck tasks (12) -1 193 1200d 1362d 26/26 fixed on 2023/06/10 02:45
gvisor kvm: panic: Sentry detected stuck tasks (14) -1 syz 4 1146d 1151d 26/26 fixed on 2023/08/08 01:03
gvisor kvm: panic: Sentry detected stuck tasks (17) -1 14 1080d 1110d 26/26 fixed on 2023/10/09 12:22

Sample crash report:
panic: Sentry detected 2 stuck task(s):
		Task tid: 86 (goroutine 844), entered RunSys state 3m14.76s ago.
		Task tid: 89 (goroutine 1010), entered RunSys state 3m0.15s 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 114 gp=0xc000880540 m=35 mp=0xc004380008 [running]:
panic({0x11ce4e0?, 0xc00032cd00?})
	GOROOT/src/runtime/panic.go:811 +0x168 fp=0xc000792c80 sp=0xc000792bd0 pc=0x4785e8
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0xc000792da0?, 0x14b7714?, 0x42?, 0xc000792da0)
	pkg/sentry/watchdog/watchdog.go:371 +0x348 fp=0xc000792d48 sp=0xc000792c80 pc=0xd1fc88
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc00014e080, 0xc002de2810, 0x1, {0x2f?})
	pkg/sentry/watchdog/watchdog.go:330 +0x24f fp=0xc000792e78 sp=0xc000792d48 pc=0xd1f86f
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc00014e080)
	pkg/sentry/watchdog/watchdog.go:312 +0x47b fp=0xc000792f58 sp=0xc000792e78 pc=0xd1f53b
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc00014e080)
	pkg/sentry/watchdog/watchdog.go:249 +0x25 fp=0xc000792fc8 sp=0xc000792f58 pc=0xd1f025
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start.gowrap2()
	pkg/sentry/watchdog/watchdog.go:200 +0x25 fp=0xc000792fe0 sp=0xc000792fc8 pc=0xd1eb85
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000792fe8 sp=0xc000792fe0 pc=0x481401
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start in goroutine 1
	pkg/sentry/watchdog/watchdog.go:200 +0x1d8

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/17 05:38 gvisor 9fc4303aefe1 f7988ea4 console log report syz / log C ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2025/11/17 01:19 gvisor 9fc4303aefe1 f7988ea4 .config console log report syz / log C ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2025/11/16 04:44 gvisor 9fc4303aefe1 f7988ea4 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.