kvm: panic: Sentry detected stuck tasks (31)

Status: fixed on 2026/09/17 23:32
Reported-by: syzbot+e1de6fff0ff50c479636@syzkaller.appspotmail.com
Fix commit: d16b52a7d05e images/gpu: fix non-building images for nccl-tests and vllm
First crash: 4d00h, last: 4d00h
▶ ▼ 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 1829d 1991d 14/26 fixed on 2021/09/25 08:25
gvisor kvm: panic: Sentry detected stuck tasks (26) -1 syz, C 3 513d 514d 0/26 closed as invalid on 2025/04/25 22:43
gvisor kvm: panic: Sentry detected stuck tasks (7) -1 1 1583d 1576d 14/26 fixed on 2022/06/09 21:04
gvisor kvm: panic: Sentry detected stuck tasks (19) -1 3 1042d 1040d 26/26 fixed on 2023/11/15 20:33
gvisor kvm: panic: Sentry detected stuck tasks (23) -1 1 915d 915d 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 2006d 2022d 14/26 fixed on 2021/03/24 13:21
gvisor kvm: panic: Sentry detected stuck tasks (24) -1 syz, C 9 649d 692d 26/26 fixed on 2024/12/11 10:55
gvisor kvm: panic: Sentry detected stuck tasks (6) -1 15 1664d 1675d 14/26 fixed on 2022/03/01 23:36
gvisor kvm: panic: Sentry detected stuck tasks (18) -1 syz, C 3 1054d 1059d 26/26 fixed on 2023/11/03 12:12
gvisor kvm: panic: Sentry detected stuck tasks (4) -1 syz, C 627 1745d 1772d 14/26 fixed on 2021/12/10 13:30
gvisor kvm: panic: Sentry detected stuck tasks (27) -1 syz, C 5 510d 512d 26/26 fixed on 2025/05/02 08:36
gvisor kvm: panic: Sentry detected stuck tasks (10) -1 3 1406d 1423d 14/26 fixed on 2022/11/30 11:09
gvisor kvm: panic: Sentry detected stuck tasks (22) -1 syz, C 8 1020d 1031d 26/26 fixed on 2023/12/12 09:56
gvisor kvm: panic: Sentry detected stuck tasks (8) -1 1 1501d 1501d 0/26 closed as invalid on 2022/08/11 16:05
gvisor kvm: panic: Sentry detected stuck tasks (11) -1 1 1387d 1387d 0/26 closed as invalid on 2022/12/05 18:51
gvisor kvm: panic: Sentry detected stuck tasks (21) -1 syz, C 2 1035d 1037d 26/26 fixed on 2023/11/21 23:47
gvisor kvm: panic: Sentry detected stuck tasks (15) -1 syz, C 186 1129d 1132d 26/26 fixed on 2023/08/19 00:49
gvisor kvm: panic: Sentry detected stuck tasks (28) -1 syz, C 11 461d 466d 26/26 fixed on 2025/07/10 09:16
gvisor kvm: panic: Sentry detected stuck tasks (20) -1 syz, C 2 1039d 1039d 26/26 fixed on 2023/11/17 11:27
gvisor kvm: panic: Sentry detected stuck tasks (29) -1 syz, C 3 307d 308d 26/26 fixed on 2025/11/19 02:01
gvisor kvm: panic: Sentry detected stuck tasks (5) -1 syz, C 65 1676d 1738d 14/26 fixed on 2022/02/18 08:00
gvisor kvm: panic: Sentry detected stuck tasks (25) -1 syz, C 3409 522d 618d 26/26 fixed on 2025/04/24 21:45
gvisor kvm: panic: Sentry detected stuck tasks (9) -1 2 1472d 1473d 14/26 fixed on 2022/09/20 07:30
gvisor kvm: panic: Sentry detected stuck tasks (3) -1 1 1790d 1790d 0/26 closed as invalid on 2021/10/27 19:47
gvisor kvm: panic: Sentry detected stuck tasks (30) -1 syz, C 15 159d 196d 26/26 fixed on 2026/09/01 02:28
gvisor kvm: panic: Sentry detected stuck tasks (12) -1 193 1199d 1361d 26/26 fixed on 2023/06/10 02:45
gvisor kvm: panic: Sentry detected stuck tasks (14) -1 syz 4 1144d 1150d 26/26 fixed on 2023/08/08 01:03
gvisor kvm: panic: Sentry detected stuck tasks (17) -1 14 1078d 1109d 26/26 fixed on 2023/10/09 12:22

Sample crash report:
panic: Sentry detected 1 stuck task(s):
		Task tid: 25946 (goroutine 91341), entered RunSys state 3m32.74s 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 116 gp=0x1eaa264a0b40 m=26 mp=0x1eaa27401008 [running]:
panic({0x1a8e100?, 0x1eaa29b0efc0?})
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/go/src/runtime/panic.go:879 +0x16f fp=0x1eaa27c23bf0 sp=0x1eaa27c23b40 pc=0x48d0cf
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0x1eaa28d33770?, 0x1dd919b?, 0x50?, 0x3b?, 0x1eaa28d33770)
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:394 +0x3d4 fp=0x1eaa27c23c80 sp=0x1eaa27c23bf0 pc=0x12dd054
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0x1eaa263ea000, 0x1eaa28d33740, 0x1, {0x2f?})
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:359 +0x485 fp=0x1eaa27c23e58 sp=0x1eaa27c23c80 pc=0x12dcb85
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0x1eaa263ea000)
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:339 +0x733 fp=0x1eaa27c23f38 sp=0x1eaa27c23e58 pc=0x12dc573
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0x1eaa263ea000)
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:273 +0xc5 fp=0x1eaa27c23fc8 sp=0x1eaa27c23f38 pc=0x12dbca5
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start.gowrap2()
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:203 +0x17 fp=0x1eaa27c23fe0 sp=0x1eaa27c23fc8 pc=0x12db637
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/go/src/runtime/asm_amd64.s:1771 +0x1 fp=0x1eaa27c23fe8 sp=0x1eaa27c23fe0 pc=0x495e61
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start in goroutine 1
	/syzkaller/.cache/bazel/_bazel_root/e46b623d9124efeebe6def9c4e64353e/sandbox/linux-sandbox/87/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:203 +0x2f6

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/17 01:26 gvisor 901e954dacfd 95928915 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.