WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE

Status: moderation: reported syz repro on 2026/04/08 09:45
Reported-by: syzbot+3dd2dbc52cd1da5b9a40@syzkaller.appspotmail.com
First crash: 149d, last: 77d
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/04/30 20:10 tbsthitw@gmail.com patch gvisor pending

Sample crash report:
W0612 09:40:49.561230       1 log.go:359] WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:857

systrap stub thread failure: sysmsg->state was invalid during sys-handler (failed on line 359; sysmsg.Msg{msg: 7ffc0249f000 state 2 err bad0001 line 359 debug 0 app stack 7ec4cb9aa9c8 context 7ffc024d6000 ThreadID 1})
:
goroutine 40466 [running]:
gvisor.dev/gvisor/pkg/log.Stacks(0x1)
	pkg/log/log.go:319 +0x67
gvisor.dev/gvisor/pkg/log.TracebackAll({0x1dcf399727e0, 0x119}, {0x0, 0x0, 0x0})
	pkg/log/log.go:358 +0x3e
gvisor.dev/gvisor/pkg/log.reportBug(0x3, {0x1dcf3a2e2000, 0xd9}, {0x0, 0x0, 0x0})
	pkg/log/bug.go:56 +0x431
gvisor.dev/gvisor/pkg/log.reportBugErr(0x7fe358c90000?, {0x1523900?, 0x1dcf39af3068?})
	pkg/log/bug.go:37 +0x45
gvisor.dev/gvisor/pkg/log.BugTraceback(...)
	pkg/log/bug.go:126
gvisor.dev/gvisor/pkg/sentry/platform/systrap.(*subprocess).switchToApp(0x1dcf3a13a780, 0x1dcf3a070a50, 0x1dcf3a416e10)
	pkg/sentry/platform/systrap/subprocess.go:857 +0x2f5
gvisor.dev/gvisor/pkg/sentry/platform/systrap.(*platformContext).Switch(0x1dcf3a070a50, {0x154d260, 0x1dcf3a476008}, {0x1545d60, 0x1dcf3a422008}, 0x1dcf3a416e10, 0x0?)
	pkg/sentry/platform/systrap/systrap.go:179 +0xa6
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x1dcf3a20e990?, 0x1dcf3a476008)
	pkg/sentry/kernel/task_run.go:241 +0x791
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x1dcf3a476008, 0x26b8)
	pkg/sentry/kernel/task_run.go:89 +0x202
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 40330
	pkg/sentry/kernel/task_start.go:479 +0xc5

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/12 09:41 gvisor d127ea02e002 e93da63e console log report syz / log ci-gvisor-systrap-1 WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/05/05 07:11 gvisor 78db66de58c0 a898ba9c .config console log report syz / log ci-gvisor-systrap-1-race WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/05/05 06:31 gvisor 78db66de58c0 a898ba9c console log report syz / log ci-gvisor-systrap-1 WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/04/01 17:19 gvisor 305818798603 0285fe54 console log report syz / log ci-gvisor-systrap-1 WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/04/01 16:23 gvisor 305818798603 0285fe54 .config console log report syz / log ci-gvisor-systrap-1-race WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/06/12 09:00 gvisor d127ea02e002 e93da63e console log report info ci-gvisor-systrap-1 WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/05/05 05:12 gvisor 78db66de58c0 a898ba9c console log report info ci-gvisor-systrap-1 WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
2026/04/01 08:39 gvisor 82275ab10d2b fb8b2c26 .config console log report info ci-gvisor-systrap-1-race WARNING: BUG on pkg/sentry/platform/systrap/subprocess.go:LINE
* Struck through repros no longer work on HEAD.