panic: ptrace status unexpected: got 31, wanted stopped

goroutine 449108 [running]:
DIAGNOSIS:


Error collecting stacks: failed to run ["/syzkaller/managers/ptrace-direct-overlay-host/current/image" "-root" "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-platform=ptrace" "-file-access=shared" "-network=host" "debug" "-stacks" "ci-gvisor-ptrace-direct-overlay-host-1"]: exit status 128
I0119 09:39:13.778044   23628 x:0] ***************************
I0119 09:39:13.778117   23628 x:0] Args: [/syzkaller/managers/ptrace-direct-overlay-host/current/image -root /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=host debug -stacks ci-gvisor-ptrace-direct-overlay-host-1]
I0119 09:39:13.778135   23628 x:0] Git Revision: c0a981629cf44688687548490c5e665d851afe06
I0119 09:39:13.778140   23628 x:0] PID: 23628
I0119 09:39:13.778147   23628 x:0] UID: 0, GID: 0
I0119 09:39:13.778150   23628 x:0] Configuration:
I0119 09:39:13.778154   23628 x:0] 		RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root
I0119 09:39:13.778157   23628 x:0] 		Platform: ptrace
I0119 09:39:13.778175   23628 x:0] 		FileAccess: shared, overlay: false
I0119 09:39:13.778182   23628 x:0] 		Network: host, logging: false
I0119 09:39:13.778189   23628 x:0] 		Strace: false, max size: 1024, syscalls: []
I0119 09:39:13.778203   23628 x:0] ***************************
D0119 09:39:13.778249   23628 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-1"
D0119 09:39:13.779005   23628 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-1": signal 0
D0119 09:39:13.779026   23628 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0119 09:39:13.779031   23628 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0119 09:39:13.779268   23628 x:0] urpc: successfully marshalled 118 bytes.
I0119 09:39:14.038663   23628 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-1", PID: 11619
I0119 09:39:14.038729   23628 x:0] Retrieving sandbox stacks
D0119 09:39:14.038737   23628 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0119 09:39:14.038744   23628 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-1"
D0119 09:39:14.038822   23628 x:0] urpc: successfully marshalled 36 bytes.
W0119 09:39:14.078402   23628 x:0] FATAL ERROR: error retrieving stacks: err getting sandbox "ci-gvisor-ptrace-direct-overlay-host-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
error retrieving stacks: err getting sandbox "ci-gvisor-ptrace-direct-overlay-host-1" stacks: urpc method "debug.Stacks" failed: connection reset by peer
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc000d2f4a0, 0x0, 0x50cc)
	pkg/sentry/platform/ptrace/subprocess.go:323 +0x3fb
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscall(0xc000d2f4a0, 0xc0006f4cb0, 0xc0006f4e48, 0x2, 0x2)
	pkg/sentry/platform/ptrace/subprocess.go:390 +0xc3
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscallIgnoreInterrupt(0xc000d2f4a0, 0xc000d2f4b0, 0xb, 0xc0006f4e48, 0x2, 0x2, 0xc000b1eb38, 0x0, 0xc0005d6738)
	pkg/sentry/platform/ptrace/subprocess.go:428 +0xc2
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).syscall(0xc00042a0c0, 0xb, 0xc0005d6648, 0x2, 0x2, 0x0, 0x0, 0x0)
	pkg/sentry/platform/ptrace/subprocess.go:562 +0xe8
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).Unmap(0xc00042a0c0, 0x0, 0x7fffffff0000)
	pkg/sentry/platform/ptrace/subprocess.go:602 +0x22e
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).unmap(0xc00042a0c0)
	pkg/sentry/platform/ptrace/subprocess.go:215 +0x40
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).Release.func1(0xc00042a0c0)
	pkg/sentry/platform/ptrace/subprocess.go:232 +0x2f
created by gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).Release
	pkg/sentry/platform/ptrace/subprocess.go:231 +0x3f