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panic: Sentry detected stuck tasks (32)

Status: fixed on 2025/11/12 21:14
Fix commit: b3f000ac172f Do not retry on invalid UDP send buffers
First crash: 101d, last: 63d
▶ ▼ Similar bugs (31)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
gvisor panic: Sentry detected stuck tasks (16) 2 5 1313d 1386d 14/26 fixed on 2022/06/10 10:13
gvisor panic: Sentry detected stuck tasks (9) 2 9 1781d 1781d 14/26 fixed on 2021/02/26 03:02
gvisor panic: Sentry detected stuck tasks (14) 2 20 1502d 1548d 14/26 fixed on 2021/12/02 12:02
gvisor panic: Sentry detected stuck tasks (17) 2 C 822 968d 1234d 26/26 fixed on 2023/05/19 14:28
gvisor panic: Sentry detected stuck tasks (12) 2 2 1579d 1578d 14/26 fixed on 2021/09/17 01:50
gvisor panic: Sentry detected stuck tasks (20) 2 C 895 878d 880d 26/26 fixed on 2023/08/19 00:55
gvisor panic: Sentry detected stuck tasks 2 C 506 1927d 1947d 0/26 fixed on 2020/10/03 12:41
gvisor panic: Sentry detected stuck tasks (6) 2 syz 714 1815d 1867d 14/26 fixed on 2021/01/22 19:49
gvisor panic: Sentry detected stuck tasks (7) 2 syz 2567 1783d 1815d 14/26 fixed on 2021/02/23 13:36
gvisor panic: Sentry detected stuck tasks (4) 2 C 5 1881d 1881d 0/26 fixed on 2020/11/18 07:03
gvisor panic: Sentry detected stuck tasks (22) 2 5 828d 828d 26/26 fixed on 2023/10/07 05:04
gvisor panic: Sentry detected stuck tasks (8) 2 C 64 1781d 1783d 14/26 fixed on 2021/02/25 13:46
gvisor panic: Sentry detected stuck tasks (13) 2 1 1578d 1577d 14/26 fixed on 2021/09/27 21:02
gvisor panic: Sentry detected stuck tasks (10) 2 C 264 1728d 1781d 14/26 fixed on 2021/04/20 00:15
gvisor panic: Sentry detected stuck tasks (26) 2 C 17 397d 398d 26/26 fixed on 2024/12/11 10:55
gvisor panic: Sentry detected stuck tasks (11) 2 C 31 1594d 1721d 14/26 fixed on 2021/09/03 10:11
gvisor panic: Sentry detected stuck tasks (3) 2 C 180 1882d 1886d 0/26 fixed on 2020/11/17 10:52
gvisor panic: Sentry detected stuck tasks (31) 2 3 116d 158d 26/26 fixed on 2025/09/19 06:07
gvisor panic: Sentry detected stuck tasks (28) 2 C 11282 262d 366d 26/26 fixed on 2025/04/24 21:44
gvisor panic: Sentry detected stuck tasks (21) 2 64 829d 877d 26/26 fixed on 2023/10/05 23:05
gvisor panic: Sentry detected stuck tasks (2) 2 C 951 1886d 1926d 0/26 fixed on 2020/11/13 09:22
gvisor panic: Sentry detected stuck tasks (5) 2 syz 83 1868d 1881d 0/26 fixed on 2020/12/01 11:18
gvisor panic: Sentry detected stuck tasks (33) 2 C 13 55d 56d 26/26 fixed on 2025/11/19 02:01
gvisor panic: Sentry detected stuck tasks (27) 2 C 14 374d 394d 26/26 fixed on 2025/01/07 21:12
gvisor panic: Sentry detected stuck tasks (15) 2 C 2582 1422d 1499d 14/26 fixed on 2022/02/25 14:00
gvisor panic: Sentry detected stuck tasks (34) 2 1 54d 4d10h 24/26 moderation: reported on 2026/01/08 01:43
gvisor panic: Sentry detected stuck tasks (25) 2 C 78 398d 427d 26/26 fixed on 2024/12/09 18:01
gvisor panic: Sentry detected stuck tasks (29) 2 C 51 257d 262d 26/26 fixed on 2025/04/30 13:05
gvisor panic: Sentry detected stuck tasks (24) 2 C 13 816d 822d 26/26 fixed on 2023/10/19 08:45
gvisor panic: Sentry detected stuck tasks (23) 2 C 23 823d 828d 26/26 fixed on 2023/10/12 20:28
gvisor panic: Sentry detected stuck tasks (18) 2 C 625 910d 968d 26/26 fixed on 2023/07/19 00:35

Sample crash report:
panic: Sentry detected 1 stuck task(s):
		Task tid: 25257 (goroutine 102077), entered RunSys state 3m32.81s 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 23 gp=0xc000702a80 m=100 mp=0xc001b24808 [running]:
panic({0x18eba60?, 0xc002b5a2c0?})
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/go/src/runtime/panic.go:802 +0x168 fp=0xc000605c80 sp=0xc000605bd0 pc=0x480428
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).doAction(0xc000605da0?, 0x1bdbcd9?, 0x50?, 0xc000605da0)
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:371 +0x488 fp=0xc000605d48 sp=0xc000605c80 pc=0x11e9c48
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).report(0xc00040e000, 0xc001e09860, 0x1, {0x2f?})
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:330 +0x365 fp=0xc000605e78 sp=0xc000605d48 pc=0x11e96c5
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).runTurn(0xc00040e000)
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:312 +0x733 fp=0xc000605f58 sp=0xc000605e78 pc=0x11e91d3
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).loop(0xc00040e000)
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:249 +0x6e fp=0xc000605fc8 sp=0xc000605f58 pc=0x11e89ee
gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start.gowrap2()
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:200 +0x25 fp=0xc000605fe0 sp=0xc000605fc8 pc=0x11e81a5
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/go/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000605fe8 sp=0xc000605fe0 pc=0x4896c1
created by gvisor.dev/gvisor/pkg/sentry/watchdog.(*Watchdog).Start in goroutine 1
	/syzkaller/.cache/bazel/_bazel_root/3cda29e0ad466371615d977190968f26/sandbox/linux-sandbox/1/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/watchdog/watchdog.go:200 +0x3b6

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/09 00:52 gvisor c0171a1ef32a 4e1406b4 .config console log report info ci-gvisor-ptrace-1-race-cover panic: Sentry detected stuck tasks
2025/10/08 10:57 gvisor 6bf3c4885132 7e2882b3 .config console log report info ci-gvisor-systrap-1-race panic: Sentry detected stuck tasks
2025/10/05 22:39 gvisor 73f1154f95e7 49379ee0 .config console log report info ci-gvisor-systrap-1-race panic: Sentry detected stuck tasks
2025/10/02 16:04 gvisor 5ad0647ea1a5 49379ee0 .config console log report info ci-gvisor-systrap-1-race panic: Sentry detected stuck tasks
2025/11/10 06:13 gvisor 605acfd94beb 4e1406b4 .config console log report info ci-gvisor-arm64-ptrace-1-cover panic: Sentry detected stuck tasks
* Struck through repros no longer work on HEAD.