panic: ptrace status unexpected: got 31, wanted stopped

goroutine 549229 [running]:
DIAGNOSIS:


Error collecting stacks: failed to run ["/syzkaller/managers/main/current/image" "-root" "/syzkaller/managers/main/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-platform=ptrace" "-file-access=shared" "-network=none" "debug" "-stacks" "ci-gvisor-main-3"]: exit status 128
I0121 14:34:42.873800   15840 x:0] ***************************
I0121 14:34:42.873865   15840 x:0] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=none debug -stacks ci-gvisor-main-3]
I0121 14:34:42.873880   15840 x:0] Git Revision: c1be25b78d89a3a55a32a7aa10724134eda9813d
I0121 14:34:42.873885   15840 x:0] PID: 15840
I0121 14:34:42.873892   15840 x:0] UID: 0, GID: 0
I0121 14:34:42.873895   15840 x:0] Configuration:
I0121 14:34:42.873898   15840 x:0] 		RootDir: /syzkaller/managers/main/workdir/gvisor_root
I0121 14:34:42.873901   15840 x:0] 		Platform: ptrace
I0121 14:34:42.873923   15840 x:0] 		FileAccess: shared, overlay: false
I0121 14:34:42.873930   15840 x:0] 		Network: none, logging: false
I0121 14:34:42.873936   15840 x:0] 		Strace: false, max size: 1024, syscalls: []
I0121 14:34:42.873940   15840 x:0] ***************************
D0121 14:34:42.873955   15840 x:0] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-3"
D0121 14:34:42.874735   15840 x:0] Signal container "ci-gvisor-main-3": signal 0
D0121 14:34:42.874763   15840 x:0] Signal sandbox "ci-gvisor-main-3"
D0121 14:34:42.874768   15840 x:0] Connecting to sandbox "ci-gvisor-main-3"
D0121 14:34:42.875062   15840 x:0] urpc: successfully marshalled 96 bytes.
I0121 14:34:43.446637   15840 x:0] Found sandbox "ci-gvisor-main-3", PID: 2404
I0121 14:34:43.446679   15840 x:0] Retrieving sandbox stacks
D0121 14:34:43.446690   15840 x:0] Stacks sandbox "ci-gvisor-main-3"
D0121 14:34:43.446695   15840 x:0] Connecting to sandbox "ci-gvisor-main-3"
D0121 14:34:43.446769   15840 x:0] urpc: successfully marshalled 36 bytes.
W0121 14:34:43.492111   15840 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-main-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
retrieving stacks: getting sandbox "ci-gvisor-main-3" stacks: urpc method "debug.Stacks" failed: connection reset by peer
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc000b311d0, 0x0, 0x221b)
	pkg/sentry/platform/ptrace/subprocess.go:323 +0x3fb
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscall(0xc000b311d0, 0xc00106fad8, 0xc00106fc68, 0x6, 0x6)
	pkg/sentry/platform/ptrace/subprocess.go:390 +0xc3
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscallIgnoreInterrupt(0xc000b311d0, 0xc000b311e0, 0x9, 0xc00106fc68, 0x6, 0x6, 0xc0011e7470, 0x1, 0xc00106fcb0)
	pkg/sentry/platform/ptrace/subprocess.go:428 +0xc2
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).syscall(0xc0008221c0, 0x9, 0xc00106fc68, 0x6, 0x6, 0x0, 0x0, 0x0)
	pkg/sentry/platform/ptrace/subprocess.go:562 +0xe8
gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).MapFile(0xc0008221c0, 0x6e1000, 0xc, 0x101db000, 0x101f3000, 0x1, 0xc0011e6df0, 0x1)
	pkg/sentry/platform/ptrace/subprocess.go:571 +0x107
gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).MapInto(0xc000292000, 0xd5b940, 0xc0008221c0, 0x6e1000, 0x101db000, 0x101f3000, 0x1, 0xc00106fd90, 0x695441)
	pkg/sentry/platform/filemem/filemem.go:512 +0xeb
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).mapASLocked(0xc0011e6d80, 0xc0011e7470, 0x1, 0x6f7000, 0x6f8000, 0x6f7000, 0x6f8000, 0x0)
	pkg/sentry/mm/address_space.go:186 +0x1aa
gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).HandleUserFault(0xc0011e6d80, 0xd5be20, 0xc000c98a80, 0x6f7748, 0x1, 0x7f0429e15900, 0x0, 0x1)
	pkg/sentry/mm/syscalls.go:71 +0x27f
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000c98a80, 0xd4f000, 0x0)
	pkg/sentry/kernel/task_run.go:251 +0x77b
gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc000c98a80, 0x16a4)
	pkg/sentry/kernel/task_run.go:91 +0x149
created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:279 +0xfe