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kvm: panic: Sentry detected stuck tasks (7)

Status: fixed on 2022/06/09 21:04
Reported-by: syzbot+5cccbb7c0511ad1aa175@syzkaller.appspotmail.com
Fix commit: 6fda48f50dcd tcpip/transport/raw: check MTU before copying a buffer from user memory
First crash: 1244d, last: 1244d
▶ ▼ Similar bugs (25)
Kernel Title Rank πŸ›ˆ Repro Cause bisect Fix bisect Count Last Reported Patched Status
gvisor kvm: panic: Sentry detected stuck tasks (2) -1 C 66 1489d 1652d 14/26 fixed on 2021/09/25 08:25
gvisor kvm: panic: Sentry detected stuck tasks (26) -1 C 3 174d 174d 0/26 closed as invalid on 2025/04/25 22:43
gvisor kvm: panic: Sentry detected stuck tasks (19) -1 3 703d 701d 26/26 fixed on 2023/11/15 20:33
gvisor kvm: panic: Sentry detected stuck tasks (23) -1 1 576d 576d 0/26 auto-obsoleted due to no activity on 2024/06/25 13:36
gvisor kvm: panic: Sentry detected stuck tasks -1 C 152 1667d 1683d 14/26 fixed on 2021/03/24 13:21
gvisor kvm: panic: Sentry detected stuck tasks (24) -1 C 9 310d 353d 26/26 fixed on 2024/12/11 10:55
gvisor kvm: panic: Sentry detected stuck tasks (6) -1 15 1325d 1336d 14/26 fixed on 2022/03/01 23:36
gvisor kvm: panic: Sentry detected stuck tasks (18) -1 C 3 715d 720d 26/26 fixed on 2023/11/03 12:12
gvisor kvm: panic: Sentry detected stuck tasks (4) -1 C 627 1406d 1433d 14/26 fixed on 2021/12/10 13:30
gvisor kvm: panic: Sentry detected stuck tasks (27) -1 C 5 171d 173d 26/26 fixed on 2025/05/02 08:36
gvisor kvm: panic: Sentry detected stuck tasks (10) -1 3 1067d 1084d 14/26 fixed on 2022/11/30 11:09
gvisor kvm: panic: Sentry detected stuck tasks (22) -1 C 8 681d 692d 26/26 fixed on 2023/12/12 09:56
gvisor kvm: panic: Sentry detected stuck tasks (8) -1 1 1162d 1162d 0/26 closed as invalid on 2022/08/11 16:05
gvisor kvm: panic: Sentry detected stuck tasks (11) -1 1 1048d 1048d 0/26 closed as invalid on 2022/12/05 18:51
gvisor kvm: panic: Sentry detected stuck tasks (21) -1 C 2 696d 698d 26/26 fixed on 2023/11/21 23:47
gvisor kvm: panic: Sentry detected stuck tasks (15) -1 C 186 790d 793d 26/26 fixed on 2023/08/19 00:49
gvisor kvm: panic: Sentry detected stuck tasks (28) -1 C 11 122d 127d 26/26 fixed on 2025/07/10 09:16
gvisor kvm: panic: Sentry detected stuck tasks (20) -1 C 2 700d 700d 26/26 fixed on 2023/11/17 11:27
gvisor kvm: panic: Sentry detected stuck tasks (5) -1 C 65 1337d 1399d 14/26 fixed on 2022/02/18 08:00
gvisor kvm: panic: Sentry detected stuck tasks (25) -1 C 3409 183d 279d 26/26 fixed on 2025/04/24 21:45
gvisor kvm: panic: Sentry detected stuck tasks (9) -1 2 1133d 1134d 14/26 fixed on 2022/09/20 07:30
gvisor kvm: panic: Sentry detected stuck tasks (3) -1 1 1451d 1451d 0/26 closed as invalid on 2021/10/27 19:47
gvisor kvm: panic: Sentry detected stuck tasks (12) -1 193 860d 1022d 26/26 fixed on 2023/06/10 02:45
gvisor kvm: panic: Sentry detected stuck tasks (14) -1 syz 4 805d 811d 26/26 fixed on 2023/08/08 01:03
gvisor kvm: panic: Sentry detected stuck tasks (17) -1 14 739d 770d 26/26 fixed on 2023/10/09 12:22

Sample crash report:
panic: Sentry detected 1 stuck task(s):
	Task tid: 3322 (goroutine 414808), entered RunSys state 3m34.75s 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 132 [running]:
panic({0x11beae0, 0xc00699d060})
	GOROOT/src/runtime/panic.go:1147 +0x3a8 fp=0xc002697c88 sp=0xc002697bc8 pc=0x435148
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0xc002697e08, 0x14076d6, 0x47, 0xc002697db0)
	pkg/sentry/watchdog/watchdog.go:379 +0x3b4 fp=0xc002697d48 sp=0xc002697c88 pc=0xc99df4
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc0000e2200, 0xc0005e75c0, 0x0, {0x0})
	pkg/sentry/watchdog/watchdog.go:338 +0x2b1 fp=0xc002697e78 sp=0xc002697d48 pc=0xc99951
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc0000e2200)
	pkg/sentry/watchdog/watchdog.go:320 +0x5a5 fp=0xc002697f58 sp=0xc002697e78 pc=0xc99585
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc0000e2200)
	pkg/sentry/watchdog/watchdog.go:255 +0x3d fp=0xc002697fc8 sp=0xc002697f58 pc=0xc98f1d
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).StartΒ·dwrapΒ·3()
	pkg/sentry/watchdog/watchdog.go:206 +0x26 fp=0xc002697fe0 sp=0xc002697fc8 pc=0xc98a06
runtime.goexit()
	src/runtime/asm_amd64.s:1581 +0x1 fp=0xc002697fe8 sp=0xc002697fe0 pc=0x4692a1
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start
	pkg/sentry/watchdog/watchdog.go:206 +0x1e7

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/05/21 19:23 gvisor bb1a83085b3b 7268fa62 .config console log report info ci-gvisor-kvm-cover kvm: panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.