kvm: panic: Sentry detected stuck tasks (20)

Status: fixed on 2023/11/17 11:27
Fix commit: 77b137ffd8ec Fix umount not unmounting all the mounts it is supposed to.
First crash: 990d, last: 990d
▶ ▼ Similar bugs (26)
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 1779d 1942d 14/26 fixed on 2021/09/25 08:25
gvisor kvm: panic: Sentry detected stuck tasks (26) -1 syz, C 3 463d 464d 0/26 closed as invalid on 2025/04/25 22:43
gvisor kvm: panic: Sentry detected stuck tasks (7) -1 1 1533d 1526d 14/26 fixed on 2022/06/09 21:04
gvisor kvm: panic: Sentry detected stuck tasks (19) -1 3 992d 991d 26/26 fixed on 2023/11/15 20:33
gvisor kvm: panic: Sentry detected stuck tasks (23) -1 1 866d 866d 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 1957d 1972d 14/26 fixed on 2021/03/24 13:21
gvisor kvm: panic: Sentry detected stuck tasks (24) -1 syz, C 9 599d 642d 26/26 fixed on 2024/12/11 10:55
gvisor kvm: panic: Sentry detected stuck tasks (6) -1 15 1615d 1625d 14/26 fixed on 2022/03/01 23:36
gvisor kvm: panic: Sentry detected stuck tasks (18) -1 syz, C 3 1004d 1009d 26/26 fixed on 2023/11/03 12:12
gvisor kvm: panic: Sentry detected stuck tasks (4) -1 syz, C 627 1696d 1723d 14/26 fixed on 2021/12/10 13:30
gvisor kvm: panic: Sentry detected stuck tasks (27) -1 syz, C 5 461d 462d 26/26 fixed on 2025/05/02 08:36
gvisor kvm: panic: Sentry detected stuck tasks (10) -1 3 1356d 1374d 14/26 fixed on 2022/11/30 11:09
gvisor kvm: panic: Sentry detected stuck tasks (22) -1 syz, C 8 971d 981d 26/26 fixed on 2023/12/12 09:56
gvisor kvm: panic: Sentry detected stuck tasks (8) -1 1 1452d 1452d 0/26 closed as invalid on 2022/08/11 16:05
gvisor kvm: panic: Sentry detected stuck tasks (11) -1 1 1338d 1338d 0/26 closed as invalid on 2022/12/05 18:51
gvisor kvm: panic: Sentry detected stuck tasks (21) -1 syz, C 2 986d 988d 26/26 fixed on 2023/11/21 23:47
gvisor kvm: panic: Sentry detected stuck tasks (15) -1 syz, C 186 1080d 1083d 26/26 fixed on 2023/08/19 00:49
gvisor kvm: panic: Sentry detected stuck tasks (28) -1 syz, C 11 411d 416d 26/26 fixed on 2025/07/10 09:16
gvisor kvm: panic: Sentry detected stuck tasks (29) -1 syz, C 3 258d 259d 26/26 fixed on 2025/11/19 02:01
gvisor kvm: panic: Sentry detected stuck tasks (5) -1 syz, C 65 1627d 1688d 14/26 fixed on 2022/02/18 08:00
gvisor kvm: panic: Sentry detected stuck tasks (25) -1 syz, C 3409 472d 568d 26/26 fixed on 2025/04/24 21:45
gvisor kvm: panic: Sentry detected stuck tasks (9) -1 2 1422d 1424d 14/26 fixed on 2022/09/20 07:30
gvisor kvm: panic: Sentry detected stuck tasks (3) -1 1 1741d 1741d 0/26 closed as invalid on 2021/10/27 19:47
gvisor kvm: panic: Sentry detected stuck tasks (12) -1 193 1149d 1312d 26/26 fixed on 2023/06/10 02:45
gvisor kvm: panic: Sentry detected stuck tasks (14) -1 syz 4 1095d 1100d 26/26 fixed on 2023/08/08 01:03
gvisor kvm: panic: Sentry detected stuck tasks (17) -1 14 1029d 1059d 26/26 fixed on 2023/10/09 12:22

Sample crash report:
panic: Sentry detected 1 stuck task(s):
	Task tid: 168 (goroutine 735), entered RunSys state 3m18.29s 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 103 [running]:
panic({0xfe2ce0?, 0xc000b10c50?})
	GOROOT/src/runtime/panic.go:1017 +0x3ac fp=0xc00140dc68 sp=0xc00140dbb8 pc=0x43a72c
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0xc00140dd90?, 0x125df1c?, 0x50?, 0xc00140dd90)
	pkg/sentry/watchdog/watchdog.go:379 +0x32a fp=0xc00140dd28 sp=0xc00140dc68 pc=0xb7548a
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc000144200, 0xc000ce4090, 0x0?, {0xc000116f60?})
	pkg/sentry/watchdog/watchdog.go:338 +0x24b fp=0xc00140de58 sp=0xc00140dd28 pc=0xb7508b
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc000144200)
	pkg/sentry/watchdog/watchdog.go:320 +0x505 fp=0xc00140df58 sp=0xc00140de58 pc=0xb74d45
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc000144200)
	pkg/sentry/watchdog/watchdog.go:255 +0x25 fp=0xc00140dfc8 sp=0xc00140df58 pc=0xb747a5
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start.func2()
	pkg/sentry/watchdog/watchdog.go:206 +0x25 fp=0xc00140dfe0 sp=0xc00140dfc8 pc=0xb742c5
runtime.goexit()
	src/runtime/asm_amd64.s:1650 +0x1 fp=0xc00140dfe8 sp=0xc00140dfe0 pc=0x471241
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start in goroutine 1
	pkg/sentry/watchdog/watchdog.go:206 +0x1cc

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/16 02:20 gvisor ceb1b69e35ec cb976f63 console log report syz C ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2023/11/16 02:14 gvisor ceb1b69e35ec cb976f63 .config console log report syz C ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.