panic: ptrace status unexpected: got 9, wanted stopped

DIAGNOSIS:


Error collecting stacks: failed to run ["/syzkaller/managers/kvm-direct-overlay-host-race/current/image" "-root" "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-platform=ptrace" "-file-access=exclusive" "-overlay" "-network=host" "debug" "-stacks" "ci-gvisor-kvm-direct-overlay-host-race-1"]: exit status 128
I0226 14:14:21.624752   26073 x:0] ***************************
I0226 14:14:21.626339   26073 x:0] Args: [/syzkaller/managers/kvm-direct-overlay-host-race/current/image -root /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=exclusive -overlay -network=host debug -stacks ci-gvisor-kvm-direct-overlay-host-race-1]
I0226 14:14:21.626481   26073 x:0] Git Revision: 52a2abfca43cffdb9cafb91a4266dacf51525470
I0226 14:14:21.626549   26073 x:0] PID: 26073
I0226 14:14:21.626580   26073 x:0] UID: 0, GID: 0
I0226 14:14:21.626644   26073 x:0] Configuration:
I0226 14:14:21.626674   26073 x:0] 		RootDir: /syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root
I0226 14:14:21.626706   26073 x:0] 		Platform: ptrace
I0226 14:14:21.626734   26073 x:0] 		FileAccess: exclusive, overlay: true
I0226 14:14:21.626809   26073 x:0] 		Network: host, logging: false
I0226 14:14:21.626838   26073 x:0] 		Strace: false, max size: 1024, syscalls: []
I0226 14:14:21.626874   26073 x:0] ***************************
D0226 14:14:21.629409   26073 x:0] Load container "/syzkaller/managers/kvm-direct-overlay-host-race/workdir/gvisor_root" "ci-gvisor-kvm-direct-overlay-host-race-1"
W0226 14:14:21.659180   26073 x:0] FATAL ERROR: container sandbox is not running
container sandbox is not running
goroutine 125 [running]:
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc093510d20, 0x0, 0xeedc)
	pkg/sentry/platform/ptrace/subprocess.go:323 +0x521
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).switchToApp(0xc0002e4200, 0xc00044c780, 0x1253400, 0xc000288ea0, 0x6400)
	pkg/sentry/platform/ptrace/subprocess.go:508 +0x68e
W0226 14:14:21.434262   27097 x:0] FATAL ERROR: waiting on pid 17: waiting on PID 17 in sandbox "ci-gvisor-kvm-direct-overlay-host-race-1": urpc method "containerManager.WaitPID" failed: EOF
waiting on pid 17: waiting on PID 17 in sandbox "ci-gvisor-kvm-direct-overlay-host-race-1": urpc method "containerManager.WaitPID" failed: EOF
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*context).Switch(0xc00044c780W0226 14:14:21.437959   26391 x:0] Wait RPC to container "ci-gvisor-kvm-direct-overlay-host-race-1" failed: urpc method "containerManager.Wait" failed: EOF. Will try waiting on the sandbox process instead.
D0226 14:14:21.440549   26391 x:0] Destroy container "ci-gvisor-kvm-direct-overlay-host-race-1"
D0226 14:14:21.440622   26391 x:0] Destroying container "ci-gvisor-kvm-direct-overlay-host-race-1"
D0226 14:14:21.440662   26391 x:0] Destroying root container "ci-gvisor-kvm-direct-overlay-host-race-1" by destroying sandbox
D0226 14:14:21.440745   26391 x:0] Destroy sandbox "ci-gvisor-kvm-direct-overlay-host-race-1"
D0226 14:14:21.440825   26391 x:0] Killing gofer for container "ci-gvisor-kvm-direct-overlay-host-race-1", PID: 26569
I0226 14:14:21.851948   26391 x:0] Exiting with status: 9