kvm: panic: Sentry detected stuck tasks (4)

Status: fixed on 2021/12/10 13:30
Reported-by: syzbot+773e19ca2574516c9e00@syzkaller.appspotmail.com
Fix commit: 4d29819e13a1 pipe: have separate notifiers for readers and writers
First crash: 1778d, last: 1744d
▶ ▼ 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 1827d 1990d 14/26 fixed on 2021/09/25 08:25
gvisor kvm: panic: Sentry detected stuck tasks (26) -1 syz, C 3 511d 512d 0/26 closed as invalid on 2025/04/25 22:43
gvisor kvm: panic: Sentry detected stuck tasks (7) -1 1 1582d 1574d 14/26 fixed on 2022/06/09 21:04
gvisor kvm: panic: Sentry detected stuck tasks (19) -1 3 1040d 1039d 26/26 fixed on 2023/11/15 20:33
gvisor kvm: panic: Sentry detected stuck tasks (23) -1 1 914d 914d 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 2005d 2021d 14/26 fixed on 2021/03/24 13:21
gvisor kvm: panic: Sentry detected stuck tasks (24) -1 syz, C 9 648d 691d 26/26 fixed on 2024/12/11 10:55
gvisor kvm: panic: Sentry detected stuck tasks (6) -1 15 1663d 1674d 14/26 fixed on 2022/03/01 23:36
gvisor kvm: panic: Sentry detected stuck tasks (18) -1 syz, C 3 1053d 1058d 26/26 fixed on 2023/11/03 12:12
gvisor kvm: panic: Sentry detected stuck tasks (27) -1 syz, C 5 509d 511d 26/26 fixed on 2025/05/02 08:36
gvisor kvm: panic: Sentry detected stuck tasks (10) -1 3 1405d 1422d 14/26 fixed on 2022/11/30 11:09
gvisor kvm: panic: Sentry detected stuck tasks (22) -1 syz, C 8 1019d 1029d 26/26 fixed on 2023/12/12 09:56
gvisor kvm: panic: Sentry detected stuck tasks (8) -1 1 1500d 1500d 0/26 closed as invalid on 2022/08/11 16:05
gvisor kvm: panic: Sentry detected stuck tasks (11) -1 1 1386d 1386d 0/26 closed as invalid on 2022/12/05 18:51
gvisor kvm: panic: Sentry detected stuck tasks (21) -1 syz, C 2 1034d 1036d 26/26 fixed on 2023/11/21 23:47
gvisor kvm: panic: Sentry detected stuck tasks (15) -1 syz, C 186 1128d 1131d 26/26 fixed on 2023/08/19 00:49
gvisor kvm: panic: Sentry detected stuck tasks (31) -1 1 2d18h 2d03h 26/26 fixed on 2026/09/17 23:32
gvisor kvm: panic: Sentry detected stuck tasks (28) -1 syz, C 11 460d 465d 26/26 fixed on 2025/07/10 09:16
gvisor kvm: panic: Sentry detected stuck tasks (20) -1 syz, C 2 1038d 1038d 26/26 fixed on 2023/11/17 11:27
gvisor kvm: panic: Sentry detected stuck tasks (29) -1 syz, C 3 306d 307d 26/26 fixed on 2025/11/19 02:01
gvisor kvm: panic: Sentry detected stuck tasks (5) -1 syz, C 65 1675d 1737d 14/26 fixed on 2022/02/18 08:00
gvisor kvm: panic: Sentry detected stuck tasks (25) -1 syz, C 3409 521d 616d 26/26 fixed on 2025/04/24 21:45
gvisor kvm: panic: Sentry detected stuck tasks (9) -1 2 1471d 1472d 14/26 fixed on 2022/09/20 07:30
gvisor kvm: panic: Sentry detected stuck tasks (3) -1 1 1789d 1789d 0/26 closed as invalid on 2021/10/27 19:47
gvisor kvm: panic: Sentry detected stuck tasks (30) -1 syz, C 15 157d 195d 26/26 fixed on 2026/09/01 02:28
gvisor kvm: panic: Sentry detected stuck tasks (12) -1 193 1197d 1360d 26/26 fixed on 2023/06/10 02:45
gvisor kvm: panic: Sentry detected stuck tasks (14) -1 syz 4 1143d 1148d 26/26 fixed on 2023/08/08 01:03
gvisor kvm: panic: Sentry detected stuck tasks (17) -1 14 1077d 1107d 26/26 fixed on 2023/10/09 12:22

Sample crash report:
panic: Sentry detected 1 stuck task(s):
	Task tid: 23 (goroutine 212), entered RunSys state 3m33.12s 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 [running]:
panic(0x10eb2c0, 0xc00029bad0)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc000707c60 sp=0xc000707b98 pc=0x437c65
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0xc00016c100, 0x1, 0x1, 0xc000707da0)
	pkg/sentry/watchdog/watchdog.go:380 +0x565 fp=0xc000707d30 sp=0xc000707c60 pc=0xc16c65
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc00016c100, 0xc000eb8000, 0x10c01, 0xd18a646480)
	pkg/sentry/watchdog/watchdog.go:339 +0x315 fp=0xc000707e68 sp=0xc000707d30 pc=0xc16635
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc00016c100)
	pkg/sentry/watchdog/watchdog.go:321 +0x52b fp=0xc000707f58 sp=0xc000707e68 pc=0xc1624b
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc00016c100)
	pkg/sentry/watchdog/watchdog.go:256 +0x34 fp=0xc000707fd8 sp=0xc000707f58 pc=0xc15c54
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc000707fe0 sp=0xc000707fd8 pc=0x472861
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start
	pkg/sentry/watchdog/watchdog.go:207 +0x1b1

Crashes (627):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/12/10 08:42 gvisor 7f4b03068f03 4d4ce9bc .config console log report syz C ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 08:39 gvisor 7f4b03068f03 4d4ce9bc .config console log report syz C ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/09 19:38 gvisor dedb7e6ca10a b54aa474 .config console log report syz C ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 18:16 gvisor dedb7e6ca10a b54aa474 .config console log report syz C ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 12:49 gvisor dedb7e6ca10a a4a2a501 .config console log report syz C ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/09 10:13 gvisor dedb7e6ca10a a4a2a501 .config console log report syz C ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/10 12:23 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 11:56 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 10:52 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 10:30 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 09:29 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 07:02 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 06:37 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/10 05:36 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/10 05:30 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 04:29 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 03:28 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/10 02:46 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/10 01:33 gvisor 7f4b03068f03 4d4ce9bc .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/10 00:16 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 23:12 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 22:21 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 21:28 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/09 21:10 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 20:05 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 19:20 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/09 17:52 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/12/09 16:40 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 16:14 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 15:55 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 15:36 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 15:20 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 14:58 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 14:35 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 14:04 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 13:39 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 13:16 gvisor dedb7e6ca10a b54aa474 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 11:31 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 11:10 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 10:53 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 10:34 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 09:50 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 09:24 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 09:01 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 08:57 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 08:57 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 08:56 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/12/09 08:56 gvisor dedb7e6ca10a a4a2a501 .config console log report info ci-gvisor-kvm kvm: panic: Sentry detected stuck tasks
2021/11/12 22:50 gvisor 7d9bdaf7f86c 83f5c9b5 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
2021/11/06 00:55 gvisor ce4f4283badb 4c1be0be .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.