panic: ptrace status unexpected: got 31, wanted stopped 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-2"]: exit status 128 I0218 04:29:31.415409 50406 x:0] *************************** I0218 04:29:31.415455 50406 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-2] I0218 04:29:31.415467 50406 x:0] Git Revision: c611dbc5a7399922588e3fd99b22bda19f684afe I0218 04:29:31.415472 50406 x:0] PID: 50406 I0218 04:29:31.415478 50406 x:0] UID: 0, GID: 0 I0218 04:29:31.415481 50406 x:0] Configuration: I0218 04:29:31.415484 50406 x:0] RootDir: /syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root I0218 04:29:31.415487 50406 x:0] Platform: ptrace I0218 04:29:31.415493 50406 x:0] FileAccess: shared, overlay: false I0218 04:29:31.415503 50406 x:0] Network: host, logging: false I0218 04:29:31.415509 50406 x:0] Strace: false, max size: 1024, syscalls: [] I0218 04:29:31.415512 50406 x:0] *************************** D0218 04:29:31.415532 50406 x:0] Load container "/syzkaller/managers/ptrace-direct-overlay-host/workdir/gvisor_root" "ci-gvisor-ptrace-direct-overlay-host-2" D0218 04:29:31.416084 50406 x:0] Signal container "ci-gvisor-ptrace-direct-overlay-host-2": signal 0 D0218 04:29:31.416100 50406 x:0] Signal sandbox "ci-gvisor-ptrace-direct-overlay-host-2" D0218 04:29:31.416105 50406 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-2" D0218 04:29:31.416224 50406 x:0] urpc: successfully marshalled 118 bytes. I0218 04:29:31.724690 50406 x:0] Found sandbox "ci-gvisor-ptrace-direct-overlay-host-2", PID: 10432 I0218 04:29:31.724719 50406 x:0] Retrieving sandbox stacks D0218 04:29:31.724723 50406 x:0] Stacks sandbox "ci-gvisor-ptrace-direct-overlay-host-2" D0218 04:29:31.724728 50406 x:0] Connecting to sandbox "ci-gvisor-ptrace-direct-overlay-host-2" W0218 04:29:31.724768 50406 x:0] FATAL ERROR: retrieving stacks: connecting to control server at PID 10432: connection refused retrieving stacks: connecting to control server at PID 10432: connection refused goroutine 1175801 [running]: gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc0014d8000, 0x0, 0x8e51) pkg/sentry/platform/ptrace/subprocess.go:323 +0x3fb gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscall(0xc0014d8000, 0xc0012fb660, 0xc0012fb7f0, 0x6, 0x6) pkg/sentry/platform/ptrace/subprocess.go:390 +0xc3 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscallIgnoreInterrupt(0xc0014d8000, 0xc0014d8010, 0x9, 0xc0012fb7f0, 0x6, 0x6, 0xc00015f700, 0x6, 0xc0012fb838) pkg/sentry/platform/ptrace/subprocess.go:428 +0xc2 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).syscall(0xc0001d2380, 0x9, 0xc0012fb7f0, 0x6, 0x6, 0x0, 0x0, 0x0) pkg/sentry/platform/ptrace/subprocess.go:562 +0xe8 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).MapFile(0xc0001d2380, 0x2af48ce9d000, 0xc, 0xf617000, 0xf638000, 0xc000000101, 0x7, 0xc00015f700) pkg/sentry/platform/ptrace/subprocess.go:571 +0x107 gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).MapInto(0xc0002b4000, 0xd668e0, 0xc0001d2380, 0x2af48ce9d000, 0xf617000, 0xf638000, 0x101, 0xc0012fb918, 0x6e15f1) pkg/sentry/platform/filemem/filemem.go:512 +0xeb gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).mapASLocked(0xc0002cf600, 0xc00015f700, 0x6, 0x2af48ce9d000, 0x2af48cebe000, 0x2af48ce9d000, 0x2af48cebe000, 0x0) pkg/sentry/mm/address_space.go:186 +0x1aa gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).populateVMAAndUnlock(0xc0002cf600, 0xd66e20, 0xc001246a80, 0xc0002cf670, 0xd, 0x2af48ce9d000, 0x2af48cebe000, 0x0) pkg/sentry/mm/syscalls.go:242 +0x1fa gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).MMap(0xc0002cf600, 0xd66e20, 0xc001246a80, 0x21000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/mm/syscalls.go:158 +0x32d gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Mmap(0xc001246a80, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/sys_mmap.go:104 +0x265 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001246a80, 0x9, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0x0, 0xc7b740, ...) pkg/sentry/kernel/task_syscall.go:165 +0x30a gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001246a80, 0x9, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0) pkg/sentry/kernel/task_syscall.go:283 +0x69 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001246a80, 0x9, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0xd59ec0, 0xc0012fbe58) pkg/sentry/kernel/task_syscall.go:244 +0x99 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001246a80, 0x2, 0xc0001d2380) pkg/sentry/kernel/task_syscall.go:219 +0x142 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc001246a80, 0xd59ec0, 0x0) pkg/sentry/kernel/task_run.go:215 +0xfda gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc001246a80, 0x61c6) 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