panic: WARNING: circular locking detected: kernel.fsContextMutex -> vfs.inotifyEventMutex: goroutine 35791 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000262c80, 0xc0006ed4a8) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x314 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00017e990, 0xc000262c60, {0xc0025601e8, 0x1, 0x1}) pkg/sync/locking/lockdep.go:112 +0x4eb gvisor.dev/gvisor/pkg/sync/locking.checkLock.func1(0xc000262c60, 0xc0006ed638?) pkg/sync/locking/lockdep.go:115 +0x74 gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000262a40, 0xc0006ed6e8) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x314 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00017e990, 0xc000262a20, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x4eb gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc00017e990, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x37b gvisor.dev/gvisor/pkg/sentry/vfs.(*inotifyEventMutex).Lock(0xc0016b6178) bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/inotify_event_mutex.go:33 +0x4d gvisor.dev/gvisor/pkg/sentry/vfs.(*Inotify).queueEvent(0xc0016b60e0, 0xc001bfbb80) pkg/sentry/vfs/inotify.go:276 +0x4e gvisor.dev/gvisor/pkg/sentry/vfs.(*Watches).HandleDeletion(0xc000c197a0, {0x21b8b30, 0xc001b47208}) pkg/sentry/vfs/inotify.go:537 +0x2fc gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).decRef.func1() pkg/sentry/fsimpl/tmpfs/tmpfs.go:605 +0x65 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inodeRefs).DecRef(0xc000c19460, 0xc0006edb10) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:133 +0xb4 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).decRef(0xc000c19458, {0x21b8b30, 0xc001b47208}) pkg/sentry/fsimpl/tmpfs/tmpfs.go:604 +0xa5 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*dentry).DecRef(0xc000c19408, {0x21b8b30, 0xc001b47208}) pkg/sentry/fsimpl/tmpfs/tmpfs.go:464 +0x65 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc000c19408, {0x21b8b30, 0xc001b47208}) pkg/sentry/vfs/dentry.go:156 +0x68 gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc000c9a000?, 0xc000c19408?}, {0x21b8b30, 0xc001b47208}) pkg/sentry/vfs/vfs.go:1114 +0x5b gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc00083f740, {0x21b8b30, 0xc001b47208}) pkg/sentry/kernel/fs_context.go:73 +0x16d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef.func1() pkg/sentry/kernel/fs_context.go:87 +0x59 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc00083f740, 0xc0006edd10) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xb4 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc00083f740, {0x21b8b30, 0xc001b47208}) pkg/sentry/kernel/fs_context.go:86 +0xa5 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc001b47208?, 0xc001b47208) pkg/sentry/kernel/task_exit.go:301 +0x7d3 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001b47208, 0x2319) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 35835 pkg/sentry/kernel/task_start.go:416 +0x17e known lock chain: vfs.inotifyEventMutex -> mm.mappingRWMutex -> kernel.taskMutex -> kernel.fsContextMutex ====== vfs.inotifyEventMutex -> mm.mappingRWMutex ===== goroutine 35806 [running]: gvisor.dev/gvisor/pkg/sentry/mm.(*mappingRWMutex).RLock(0xc001b0a05c) bazel-out/k8-fastbuild/bin/pkg/sentry/mm/mapping_mutex.go:59 +0x4d gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc001b0a008, {0x21b8b30, 0xc001a8d208}, {0x45f791?, 0xc001d6d210?}, {0x6c?, 0x86?, 0x48?}, 0x0, 0xc001362f38) pkg/sentry/mm/io.go:545 +0x145 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc001b0a008, {0x21b8b30, 0xc001a8d208}, 0x200000001fc0, {0xc001ad0520, 0x10, 0x10}, {0x1?, 0x0?}) pkg/sentry/mm/io.go:130 +0x2e7 gvisor.dev/gvisor/pkg/usermem.CopyOutVec({0x21b8b30, 0xc001a8d208}, {0x21ae4b8, 0xc001b0a008}, {0x0?, 0xa00a15?, 0x48866c?, 0x48a355?}, {0xc001ad0520, 0x10, ...}, ...) pkg/usermem/usermem.go:264 +0x26b gvisor.dev/gvisor/pkg/usermem.IOSequence.CopyOut({{0x21ae4b8, 0xc001b0a008}, {0x0, 0x1, 0x200000001fc0, 0x30}, {0x0, 0x1}}, {0x21b8b30, 0xc001a8d208}, ...) pkg/usermem/usermem.go:482 +0xe8 gvisor.dev/gvisor/pkg/sentry/vfs.(*Event).CopyTo(0xc002186680, {0x21b8b30, 0xc001a8d208}, {0xc001ad0520, 0x10, 0x10}, {{0x21ae4b8, 0xc001b0a008}, {0x0, 0x1, ...}, ...}) pkg/sentry/vfs/inotify.go:693 +0x5a5 gvisor.dev/gvisor/pkg/sentry/vfs.(*Inotify).Read(0xc0016b60e0, {0x21b8b30, 0xc001a8d208}, {{0x21ae4b8, 0xc001b0a008}, {0x0, 0x1, 0x200000001fc0, 0x30}, {0x0, ...}}, ...) pkg/sentry/vfs/inotify.go:244 +0x632 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Read(0xc0016b60e0, {0x21b8b30, 0xc001a8d208}, {{0x21ae4b8, 0xc001b0a008}, {0x0, 0x1, 0x200000001fc0, 0x30}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description.go:653 +0x154 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.read(0xc001a8d208, 0xc0016b60e0, {{0x21ae4b8, 0xc001b0a008}, {0x0, 0x1, 0x200000001fc0, 0x30}, {0x0, 0x1}}, ...) pkg/sentry/syscalls/linux/sys_read_write.go:93 +0xa5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Read(0xc001a8d208, 0x457b27?, {{0x3}, {0x200000001fc0}, {0x30}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_read_write.go:62 +0x38f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001a8d208, 0x0, {{0x3}, {0x200000001fc0}, {0x30}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001a8d208, 0x0, {{0x3}, {0x200000001fc0}, {0x30}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001a8d208, 0x0, {{0x3}, {0x200000001fc0}, {0x30}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001a8d208) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001a8d208?, 0xc001a8d208) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001a8d208, 0x231a) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 35789 pkg/sentry/kernel/task_start.go:416 +0x17e ====== mm.mappingRWMutex -> kernel.taskMutex ===== goroutine 3557 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskMutex).Lock(0xc000bb49a0) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/task_mutex.go:35 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).contextValue(0xc000bb4008, {0x1cdad80, 0x21876a0}, 0x0) pkg/sentry/kernel/task_context.go:96 +0x1236 gvisor.dev/gvisor/pkg/sentry/kernel.(*taskAsyncContext).Value(0xc00137e6e0, {0x1cdad80, 0x21876a0}) pkg/sentry/kernel/task_context.go:159 +0x65 gvisor.dev/gvisor/pkg/sentry/vfs.RootFromContext({0x7f2746f7fe50, 0xc00137e6e0}) pkg/sentry/vfs/context.go:88 +0x58 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).MappedName(0xc00091cc80, {0x21b8bc8, 0xc00137e6e0}) pkg/sentry/vfs/file_description.go:818 +0x78 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).appendVMAMapsEntryLocked(0x0?, {0x21b8bc8, 0xc00137e6e0}, {0xc000293b08?, 0xc0014fe7f0?}, 0xc001519390) pkg/sentry/mm/procfs.go:129 +0x32c gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).vmaSmapsEntryIntoLocked(0xc001a9e008, {0x21b8bc8, 0xc00137e6e0}, {0xc000293b08?, 0x48866c?}, 0xc001a5e020) pkg/sentry/mm/procfs.go:160 +0xb5 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).ReadSmapsDataInto(0xc001a9e008, {0x21b8bc8, 0xc00137e6e0}, 0xc001a5e020) pkg/sentry/mm/procfs.go:141 +0x12e gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*smapsData).Generate(0xc0007b5188, {0x21b8bc8, 0xc00137e6e0}, 0xc001a5e020) pkg/sentry/fsimpl/proc/task_files.go:670 +0x9e gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).preadLocked(0xc001a5e000, {0x21b8bc8, 0xc00137e6e0}, {{0x21ae4b8, 0xc001a9e008}, {0x0, 0x0, 0x0, 0x0}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description_impl_util.go:310 +0x1d9 gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).PRead(0xc001a5e000, {0x21b8bc8, 0xc00137e6e0}, {{0x21ae4b8, 0xc001a9e008}, {0x0, 0x0, 0x0, 0x0}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description_impl_util.go:329 +0xd5 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*DynamicBytesFD).PRead(0xc001a5e000, {0x21b8bc8, 0xc00137e6e0}, {{0x21ae4b8, 0xc001a9e008}, {0x0, 0x0, 0x0, 0x0}, {0x0, ...}}, ...) pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go:133 +0xb7 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).PRead(0xc001a5e060, {0x21b8bc8, 0xc00137e6e0}, {{0x21ae4b8, 0xc001a9e008}, {0x0, 0x0, 0x0, 0x0}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description.go:638 +0x19b gvisor.dev/gvisor/pkg/sentry/syscalls/linux.getAIOCallback.func1({0x21b8bc8, 0xc00137e6e0}) pkg/sentry/syscalls/linux/sys_aio.go:361 +0x3f4 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).QueueAIO.func1() pkg/sentry/kernel/aio.go:30 +0x62 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).QueueAIO in goroutine 3497 pkg/sentry/kernel/aio.go:29 +0x225 ====== kernel.taskMutex -> kernel.fsContextMutex ===== goroutine 291 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc000442bc8) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).Fork(0xc000442bc0) pkg/sentry/kernel/fs_context.go:95 +0x65 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Unshare(0xc0009f5908, 0x20000) pkg/sentry/kernel/task_clone.go:706 +0x1207 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Unshare(0xc0009f5908, 0x457b27?, {{0x20000}, {0x7}, {0x7f4a5ca0caf0}, {0x0}, {0x0}, {0x55f7c926e6c0}}) pkg/sentry/syscalls/linux/sys_thread.go:453 +0xd5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0009f5908, 0x110, {{0x20000}, {0x7}, {0x7f4a5ca0caf0}, {0x0}, {0x0}, {0x55f7c926e6c0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0009f5908, 0x110, {{0x20000}, {0x7}, {0x7f4a5ca0caf0}, {0x0}, {0x0}, {0x55f7c926e6c0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0009f5908, 0x110, {{0x20000}, {0x7}, {0x7f4a5ca0caf0}, {0x0}, {0x0}, {0x55f7c926e6c0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0009f5908) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0009f5908?, 0xc0009f5908) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0009f5908, 0xd) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 239 pkg/sentry/kernel/task_start.go:416 +0x17e