panic: ptrace status unexpected: got 31, wanted stopped goroutine 7053635 [running]: DIAGNOSIS: Error collecting stacks: failed to run ["/syzkaller/managers/ptrace-proxy-sandbox-race/current/image" "-root" "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "-watchdog-action=panic" "-network=none" "-debug" "-platform=ptrace" "-file-access=shared" "-network=sandbox" "debug" "-stacks" "ci-gvisor-ptrace-proxy-sandbox-race-2"]: exit status 128 I0130 07:24:35.118360 10561 x:0] *************************** I0130 07:24:35.118498 10561 x:0] Args: [/syzkaller/managers/ptrace-proxy-sandbox-race/current/image -root /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root -watchdog-action=panic -network=none -debug -platform=ptrace -file-access=shared -network=sandbox debug -stacks ci-gvisor-ptrace-proxy-sandbox-race-2] I0130 07:24:35.118602 10561 x:0] Git Revision: 24cb2c0a7256cdb515c2fc2cfc90d130e2a405ef I0130 07:24:35.118629 10561 x:0] PID: 10561 I0130 07:24:35.118675 10561 x:0] UID: 0, GID: 0 I0130 07:24:35.118697 10561 x:0] Configuration: I0130 07:24:35.118737 10561 x:0] RootDir: /syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root I0130 07:24:35.118768 10561 x:0] Platform: ptrace I0130 07:24:35.118797 10561 x:0] FileAccess: shared, overlay: false I0130 07:24:35.118848 10561 x:0] Network: sandbox, logging: false I0130 07:24:35.118881 10561 x:0] Strace: false, max size: 1024, syscalls: [] I0130 07:24:35.118932 10561 x:0] *************************** D0130 07:24:35.119010 10561 x:0] Load container "/syzkaller/managers/ptrace-proxy-sandbox-race/workdir/gvisor_root" "ci-gvisor-ptrace-proxy-sandbox-race-2" D0130 07:24:35.122501 10561 x:0] Signal container "ci-gvisor-ptrace-proxy-sandbox-race-2": signal 0 D0130 07:24:35.122573 10561 x:0] Signal sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" D0130 07:24:35.122609 10561 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" D0130 07:24:35.123049 10561 x:0] urpc: successfully marshalled 117 bytes. I0130 07:24:35.834812 10561 x:0] Found sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2", PID: 26860 I0130 07:24:35.834904 10561 x:0] Retrieving sandbox stacks D0130 07:24:35.834938 10561 x:0] Stacks sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" D0130 07:24:35.835029 10561 x:0] Connecting to sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" D0130 07:24:35.835249 10561 x:0] urpc: successfully marshalled 36 bytes. W0130 07:24:35.945529 10561 x:0] FATAL ERROR: retrieving stacks: getting sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer retrieving stacks: getting sandbox "ci-gvisor-ptrace-proxy-sandbox-race-2" stacks: urpc method "debug.Stacks" failed: connection reset by peer gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).wait(0xc000d2e690, 0x0, 0x7afc) pkg/sentry/platform/ptrace/subprocess.go:323 +0x521 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscall(0xc000d2e690, 0xc002635028, 0xc0026352a0, 0x6, 0x6) pkg/sentry/platform/ptrace/subprocess.go:390 +0x113 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*thread).syscallIgnoreInterrupt(0xc000d2e690, 0xc000d2e6a0, 0x9, 0xc0026352a0, 0x6, 0x6, 0xc002635260, 0x82035c, 0xc001849cf0) pkg/sentry/platform/ptrace/subprocess.go:428 +0x106 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).syscall(0xc000732380, 0x9, 0xc0026352a0, 0x6, 0x6, 0x0, 0x0, 0x0) pkg/sentry/platform/ptrace/subprocess.go:562 +0xf6 gvisor.googlesource.com/gvisor/pkg/sentry/platform/ptrace.(*subprocess).MapFile(0xc000732380, 0x2ab5f1441000, 0xc, 0x241c6000, 0x241e7000, 0xc000000101, 0xd, 0x45d3f2) pkg/sentry/platform/ptrace/subprocess.go:571 +0x126 gvisor.googlesource.com/gvisor/pkg/sentry/platform/filemem.(*FileMem).MapInto(0xc00015fb00, 0x12229e0, 0xc000732380, 0x2ab5f1441000, 0x241c6000, 0x241e7000, 0xc000000101, 0x43c10a, 0xc000abb200) pkg/sentry/platform/filemem/filemem.go:512 +0x11d gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).mapASLocked(0xc001849600, 0xc001849cf0, 0xd, 0x2ab5f1441000, 0x2ab5f1462000, 0x2ab5f1441000, 0x2ab5f1462000, 0x0) pkg/sentry/mm/address_space.go:186 +0x3bf gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).populateVMAAndUnlock(0xc001849600, 0x1222f20, 0xc000fa8000, 0xc001849670, 0xd, 0x2ab5f1441000, 0x2ab5f1462000, 0x0) pkg/sentry/mm/syscalls.go:242 +0x253 gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).MMap(0xc001849600, 0x1222f20, 0xc000fa8000, 0x21000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/mm/syscalls.go:158 +0x392 gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Mmap(0xc000fa8000, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/sys_mmap.go:104 +0x331 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000fa8000, 0x9, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0xc000fa8000, 0x0, ...) pkg/sentry/kernel/task_syscall.go:165 +0x17b gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000fa8000, 0x9, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0x1214840, 0x0) pkg/sentry/kernel/task_syscall.go:283 +0xb5 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000fa8000, 0x9, 0x0, 0x21000, 0x3, 0x20022, 0xffffffffffffffff, 0x0, 0xc002635c00, 0x47887e) pkg/sentry/kernel/task_syscall.go:244 +0x10d gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000fa8000, 0x2, 0xc000732380) pkg/sentry/kernel/task_syscall.go:219 +0x1e4 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000fa8000, 0x1214840, 0x0) pkg/sentry/kernel/task_run.go:215 +0x15aa gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc000fa8000, 0x8622) pkg/sentry/kernel/task_run.go:91 +0x24c created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:279 +0x19e