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panic: Stack for running G's are skipped while panicking.

Status: fixed on 2020/12/28 13:42
Reported-by: syzbot+d1d5b0c46f45eb2f3990@syzkaller.appspotmail.com
Fix commit: ab7ecdd66d2a watchdog: print panic error message before other messages
First crash: 1983d, last: 1726d
▶ ▼ Duplicate bugs (1)
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
panic: Sentry detected stuck task(s). See stack trace and message above for more details C 3766 1981d 2083d 0/26 closed as dup on 2019/07/17 00:20

Sample crash report:
panic: Stack for running G's are skipped while panicking.
Sentry detected 1 stuck task(s):
	Task tid: 8891 (0x22bb), entered RunSys state 3m34.33s ago.
Search for '(*Task).run(0x..., 0x<tid>)' in the stack dump to find the offending goroutine

goroutine 89 [running]:
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).onStuckTask(0xc0002273b0, 0xd73001, 0xc03b303d70)
	pkg/sentry/watchdog/watchdog.go:303 +0x4d4
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc0002273b0, 0xc04f3cc2d0, 0x13e01, 0xf0c5c25b80)
	pkg/sentry/watchdog/watchdog.go:265 +0x309
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc0002273b0)
	pkg/sentry/watchdog/watchdog.go:249 +0x4b9
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc0002273b0)
	pkg/sentry/watchdog/watchdog.go:186 +0x42
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start
	pkg/sentry/watchdog/watchdog.go:155 +0x1b4

Crashes (2426):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/09/02 13:21 https://gvisor.googlesource.com/gvisor master 0352cf5866dd db7c31ca .config console log report syz C ci-gvisor-kvm-direct-sandbox
2019/06/29 00:32 https://gvisor.googlesource.com/gvisor master b2907595e5e9 7509bf36 .config console log report syz C ci-gvisor-kvm-proxy-overlay-sandbox
2019/06/28 08:36 https://gvisor.googlesource.com/gvisor master e27608390336 7509bf36 .config console log report syz C ci-gvisor-kvm-direct-sandbox
2019/06/28 07:04 https://gvisor.googlesource.com/gvisor master e27608390336 7509bf36 .config console log report syz C ci-gvisor-kvm-direct-sandbox
2019/06/28 06:31 https://gvisor.googlesource.com/gvisor master 5b41ba5d0eca 7509bf36 .config console log report syz C ci-gvisor-main
2019/06/28 04:54 https://gvisor.googlesource.com/gvisor master 5b41ba5d0eca 7509bf36 .config console log report syz C ci-gvisor-main
2019/06/28 04:43 https://gvisor.googlesource.com/gvisor master 5b41ba5d0eca 7509bf36 .config console log report syz C ci-gvisor-kvm-direct-overlay-host-race
2019/06/28 03:16 https://gvisor.googlesource.com/gvisor master 5b41ba5d0eca 7509bf36 .config console log report syz C ci-gvisor-kvm-direct-overlay-host-race
2019/06/27 22:49 https://gvisor.googlesource.com/gvisor master 42e212f6b7d4 7509bf36 .config console log report syz C ci-gvisor-ptrace-direct-overlay-host
2019/06/27 18:12 https://gvisor.googlesource.com/gvisor master 42e212f6b7d4 7509bf36 .config console log report syz C ci-gvisor-ptrace-proxy-sandbox-race
2020/02/13 09:02 https://gvisor.googlesource.com/gvisor master 46a36b64d516 84f4fc8a .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/12 19:49 https://gvisor.googlesource.com/gvisor master 5205bc7e583f 84f4fc8a .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/12 09:47 https://gvisor.googlesource.com/gvisor master 5205bc7e583f a75b198c .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/11 22:39 https://gvisor.googlesource.com/gvisor master 0dd9ee0d1e08 a75b198c .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/11 10:19 https://gvisor.googlesource.com/gvisor master 724bafa094c7 084454ae .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/11 08:18 https://gvisor.googlesource.com/gvisor master 724bafa094c7 084454ae .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/11 07:14 https://gvisor.googlesource.com/gvisor master 0dd9ee0d1e08 084454ae .config console log report ci-gvisor-ptrace-direct-overlay-host
2020/02/11 05:20 https://gvisor.googlesource.com/gvisor master 724bafa094c7 d9e55b05 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/11 05:19 https://gvisor.googlesource.com/gvisor master 724bafa094c7 d9e55b05 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/10 20:57 https://gvisor.googlesource.com/gvisor master 724bafa094c7 d9e55b05 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/10 19:56 https://gvisor.googlesource.com/gvisor master 724bafa094c7 d9e55b05 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/10 16:59 https://gvisor.googlesource.com/gvisor master 17b9f5e66238 35f5e45e .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/10 15:04 https://gvisor.googlesource.com/gvisor master 17b9f5e66238 35f5e45e .config console log report ci-gvisor-main
2020/02/10 13:41 https://gvisor.googlesource.com/gvisor master 17b9f5e66238 35f5e45e .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/02/09 21:06 https://gvisor.googlesource.com/gvisor master bfa4a235f401 6ece2ea5 .config console log report ci-gvisor-kvm-direct-sandbox
2020/02/08 22:03 https://gvisor.googlesource.com/gvisor master bfa4a235f401 06150bf1 .config console log report ci-gvisor-kvm-direct-sandbox
2020/02/08 19:51 https://gvisor.googlesource.com/gvisor master bfa4a235f401 06150bf1 .config console log report ci-gvisor-kvm-direct-sandbox
2020/02/08 12:19 https://gvisor.googlesource.com/gvisor master 17b9f5e66238 06150bf1 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/02/08 10:24 https://gvisor.googlesource.com/gvisor master 17b9f5e66238 06150bf1 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/07 15:33 https://gvisor.googlesource.com/gvisor master f3d95607036b 06150bf1 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/07 13:25 https://gvisor.googlesource.com/gvisor master bfa4a235f401 06150bf1 .config console log report ci-gvisor-kvm-direct-sandbox
2020/02/07 10:41 https://gvisor.googlesource.com/gvisor master f3d95607036b 06150bf1 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/07 06:13 https://gvisor.googlesource.com/gvisor master 0e96fcafd440 06150bf1 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/02/07 05:02 https://gvisor.googlesource.com/gvisor master 0e96fcafd440 06150bf1 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/07 03:59 https://gvisor.googlesource.com/gvisor master 0e96fcafd440 06150bf1 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/02/06 21:00 https://gvisor.googlesource.com/gvisor master 0e96fcafd440 5be3a391 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/06 16:48 https://gvisor.googlesource.com/gvisor master f3d95607036b 5be3a391 .config console log report ci-gvisor-ptrace-direct-overlay-host
2020/02/06 12:40 https://gvisor.googlesource.com/gvisor master f3d95607036b 5be3a391 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/02/05 12:13 https://gvisor.googlesource.com/gvisor master 02997af5abd6 93e5e335 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2019/07/30 09:38 https://gvisor.googlesource.com/gvisor master 8da9f8a12c51 f28bf2a5 .config console log report ci-gvisor-kvm-direct-overlay-host-race
2019/06/23 15:56 https://gvisor.googlesource.com/gvisor master 35719d52c7ac 3efccdd2 .config console log report ci-gvisor-kvm-direct-sandbox
2020/03/05 16:55 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host
2020/03/05 14:42 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/03/05 03:25 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/03/04 20:35 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/03/04 18:55 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/03/04 15:40 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/03/04 04:20 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/03/02 18:49 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/03/02 10:39 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-direct-sandbox
2020/03/02 08:28 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-direct-sandbox
2020/03/02 04:52 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/03/02 03:34 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
2020/03/01 23:02 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/03/01 21:02 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/29 04:30 gvisor ce4d1e45bb88 c88c7b75 .config console log report ci-gvisor-ptrace-direct-overlay-host-race
2020/02/28 16:07 gvisor c96bb4d2ebc6 c88c7b75 .config console log report ci-gvisor-main
2020/02/28 04:52 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-direct-sandbox
2020/02/28 03:25 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/27 23:51 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/27 23:50 gvisor abf7ebcd38e8 c88c7b75 .config console log report ci-gvisor-kvm-proxy-overlay-sandbox
2020/02/27 15:41 gvisor 8fb84f78adfc 40bcfdd5 .config console log report ci-gvisor-kvm-direct-sandbox
2020/02/27 10:47 gvisor de0b2ebf8635 40bcfdd5 .config console log report ci-gvisor-ptrace-proxy-sandbox-race
* Struck through repros no longer work on HEAD.