panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex: goroutine 841534 [running]: gvisor.dev/gvisor/pkg/log.Stacks(0x60) pkg/log/log.go:316 +0x8d gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00021b780, 0xc00021bd00, {0xc00802bf28, 0x1, 0x1}) pkg/sync/locking/lockdep.go:56 +0x1f4 gvisor.dev/gvisor/pkg/sync/locking.checkLock.func1(0xc000190d98, 0xc0008b4970) pkg/sync/locking/lockdep.go:76 +0x65 gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsapmShard).doRange(0xc000190d80, 0xc0008b4ac8) bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:403 +0x256 gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).Range(0xc000190d80, 0xc00021b780) bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:382 +0x58 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00021b780, 0xc000190d80, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:73 +0x46c gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc00021b780, 0x0) pkg/sync/locking/lockdep.go:107 +0x3ba gvisor.dev/gvisor/pkg/sentry/mm.(*mappingRWMutex).RLock(0xc005d38064) bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sentry/mm/mapping_mutex.go:46 +0x3f gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc005d38000, {0x1be6650, 0xc006d6a000}, {0xc00802bf18, 0xcd73e}, {0x65, 0xe, 0x47}, 0x0, 0xc0008b4ed0) pkg/sentry/mm/io.go:530 +0xf8 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc005d38000, {0x1be6650, 0xc006d6a000}, 0x20000000, {0xc00277aa80, 0xc0008b4fdf, 0x80}, {0xdf, 0x4f}) pkg/sentry/mm/io.go:120 +0x26c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).CopyOutBytes(0xc006d6a000, 0x4492b9, {0xc00277aa80, 0x80, 0x80}) pkg/sentry/kernel/task_usermem.go:64 +0x96 gvisor.dev/gvisor/pkg/abi/linux.(*SignalInfo).CopyOutN(0xc00277aa80, {0x1bb7328, 0xc006d6a000}, 0x470e65, 0x80) bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/abi/linux/linux_abi_autogen_unsafe.go:13229 +0xd4 gvisor.dev/gvisor/pkg/abi/linux.(*SignalInfo).CopyOut(...) bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/abi/linux/linux_abi_autogen_unsafe.go:13238 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Ptrace(0xc006d6a000, 0x4202, 0x470e37, 0x0, 0x20000000) pkg/sentry/kernel/ptrace.go:1227 +0xcb5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Ptrace(0xc006d6a000, {{0x4202}, {0x180c}, {0x0}, {0x20000000}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_thread.go:734 +0x45 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc006d6a000, 0x65, {{0x4202}, {0x180c}, {0x0}, {0x20000000}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:142 +0x9d8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc006d6a000, 0x46f779, {{0x4202}, {0x180c}, {0x0}, {0x20000000}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:322 +0x6a gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0015e2e10, 0x46fc2c, {{0x4202}, {0x180c}, {0x0}, {0x20000000}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:282 +0x8f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc006d6a000) pkg/sentry/kernel/task_syscall.go:257 +0x3e7 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc006d6a000, 0xc006d6a000) pkg/sentry/kernel/task_run.go:247 +0x16b8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc006d6a000) pkg/sentry/kernel/task_run.go:90 +0x35b created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:364 +0x191