panic: WARNING: circular locking detected: kernel.fsContextMutex -> vfs.inotifyEventMutex: goroutine 3507 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc0002b9a90, 0xc000e235f0) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x314 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00017e990, 0xc0002b9a70, {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(0xc0009f6098) bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/inotify_event_mutex.go:33 +0x4d gvisor.dev/gvisor/pkg/sentry/vfs.(*Inotify).queueEvent(0xc0009f6000, 0xc001726ec0) pkg/sentry/vfs/inotify.go:276 +0x4e gvisor.dev/gvisor/pkg/sentry/vfs.(*Watch).Notify(0xc0010cd5c0, {0x0, 0x0}, 0x400, 0x0) pkg/sentry/vfs/inotify.go:604 +0x10b gvisor.dev/gvisor/pkg/sentry/vfs.(*Watches).Notify(0xc0008a4ba0, {0x21b8b30, 0xc000ea2588}, {0x0, 0x0}, 0x400, 0x0, 0x1, 0x1) pkg/sentry/vfs/inotify.go:476 +0x1fe gvisor.dev/gvisor/pkg/sentry/vfs.(*Watches).HandleDeletion(0xc0008a4ba0, {0x21b8b30, 0xc000ea2588}) pkg/sentry/vfs/inotify.go:510 +0x86 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(0xc0008a4860, 0xc000e23b10) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/inode_refs.go:133 +0xb4 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*inode).decRef(0xc0008a4858, {0x21b8b30, 0xc000ea2588}) pkg/sentry/fsimpl/tmpfs/tmpfs.go:604 +0xa5 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*dentry).DecRef(0xc0008a4808, {0x21b8b30, 0xc000ea2588}) pkg/sentry/fsimpl/tmpfs/tmpfs.go:464 +0x65 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc0008a4808, {0x21b8b30, 0xc000ea2588}) pkg/sentry/vfs/dentry.go:156 +0x68 gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc000a5a420?, 0xc0008a4808?}, {0x21b8b30, 0xc000ea2588}) pkg/sentry/vfs/vfs.go:1114 +0x5b gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc0013ab340, {0x21b8b30, 0xc000ea2588}) 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(0xc0013ab340, 0xc000e23d10) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xb4 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc0013ab340, {0x21b8b30, 0xc000ea2588}) pkg/sentry/kernel/fs_context.go:86 +0xa5 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc000ea2588?, 0xc000ea2588) pkg/sentry/kernel/task_exit.go:301 +0x7d3 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000ea2588, 0x35d) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 3467 pkg/sentry/kernel/task_start.go:416 +0x17e known lock chain: vfs.inotifyEventMutex -> mm.mappingRWMutex -> kernel.fsContextMutex ====== vfs.inotifyEventMutex -> mm.mappingRWMutex ===== goroutine 624 [running]: gvisor.dev/gvisor/pkg/sentry/mm.(*mappingRWMutex).RLock(0xc000c1305c) bazel-out/k8-fastbuild/bin/pkg/sentry/mm/mapping_mutex.go:59 +0x4d gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc000c13008, {0x21b8b30, 0xc0008a8008}, {0x1?, 0x47bf53?}, {0x6c?, 0x86?, 0x48?}, 0x0, 0xc0016cef38) pkg/sentry/mm/io.go:545 +0x145 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc000c13008, {0x21b8b30, 0xc0008a8008}, 0x200000004000, {0xc001014440, 0x10, 0x10}, {0x1?, 0x0?}) pkg/sentry/mm/io.go:130 +0x2e7 gvisor.dev/gvisor/pkg/usermem.CopyOutVec({0x21b8b30, 0xc0008a8008}, {0x21ae4b8, 0xc000c13008}, {0x0?, 0xa00a15?, 0x48866c?, 0x48a355?}, {0xc001014440, 0x10, ...}, ...) pkg/usermem/usermem.go:264 +0x26b gvisor.dev/gvisor/pkg/usermem.IOSequence.CopyOut({{0x21ae4b8, 0xc000c13008}, {0x0, 0x1, 0x200000004000, 0x2020}, {0x0, 0x1}}, {0x21b8b30, 0xc0008a8008}, ...) pkg/usermem/usermem.go:482 +0xe8 gvisor.dev/gvisor/pkg/sentry/vfs.(*Event).CopyTo(0xc001004500, {0x21b8b30, 0xc0008a8008}, {0xc001014440, 0x10, 0x10}, {{0x21ae4b8, 0xc000c13008}, {0x0, 0x1, ...}, ...}) pkg/sentry/vfs/inotify.go:693 +0x5a5 gvisor.dev/gvisor/pkg/sentry/vfs.(*Inotify).Read(0xc001066000, {0x21b8b30, 0xc0008a8008}, {{0x21ae4b8, 0xc000c13008}, {0x0, 0x1, 0x200000004000, 0x2020}, {0x0, ...}}, ...) pkg/sentry/vfs/inotify.go:244 +0x632 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Read(0xc001066000, {0x21b8b30, 0xc0008a8008}, {{0x21ae4b8, 0xc000c13008}, {0x0, 0x1, 0x200000004000, 0x2020}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description.go:653 +0x154 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.read(0xc0008a8008, 0xc001066000, {{0x21ae4b8, 0xc000c13008}, {0x0, 0x1, 0x200000004000, 0x2020}, {0x0, 0x1}}, ...) pkg/sentry/syscalls/linux/sys_read_write.go:93 +0xa5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Read(0xc0008a8008, 0x457b27?, {{0x3}, {0x200000004000}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_read_write.go:62 +0x38f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0008a8008, 0x0, {{0x3}, {0x200000004000}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0008a8008, 0x0, {{0x3}, {0x200000004000}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0008a8008, 0x0, {{0x3}, {0x200000004000}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0008a8008) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0008a8008?, 0xc0008a8008) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0008a8008, 0x70) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 645 pkg/sentry/kernel/task_start.go:416 +0x17e ====== mm.mappingRWMutex -> kernel.fsContextMutex ===== goroutine 1577 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc001055ac8) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).RootDirectory(0xc001055ac0) pkg/sentry/kernel/fs_context.go:150 +0x65 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).contextValue(0xc00320d208, {0x1cdad80, 0x21876a0}, 0x1) pkg/sentry/kernel/task_context.go:99 +0x12ba gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Value(0xc00320d208, {0x1cdad80, 0x21876a0}) pkg/sentry/kernel/task_context.go:61 +0x85 gvisor.dev/gvisor/pkg/sentry/vfs.RootFromContext({0x7fc7dafa6ef8, 0xc00320d208}) pkg/sentry/vfs/context.go:88 +0x58 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).MappedName(0xc000984280, {0x21b8b30, 0xc00320d208}) pkg/sentry/vfs/file_description.go:818 +0x78 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).appendVMAMapsEntryLocked(0xa00a15?, {0x21b8b30, 0xc00320d208}, {0xc000e50008?, 0xc00188b9f0?}, 0xc000fdc3c0) pkg/sentry/mm/procfs.go:129 +0x32c gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).vmaSmapsEntryIntoLocked(0xc001713008, {0x21b8b30, 0xc00320d208}, {0xc000e50008?, 0x48866c?}, 0xc0013b8100) pkg/sentry/mm/procfs.go:160 +0xb5 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).ReadSmapsDataInto(0xc001713008, {0x21b8b30, 0xc00320d208}, 0xc0013b8100) pkg/sentry/mm/procfs.go:141 +0x12e gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*smapsData).Generate(0xc00174b508, {0x21b8b30, 0xc00320d208}, 0xc0013b8100) pkg/sentry/fsimpl/proc/task_files.go:670 +0x9e gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).preadLocked(0xc0013b80e0, {0x21b8b30, 0xc00320d208}, {{0x21ae4b8, 0xc001713008}, {0x0, 0x1, 0x200000006140, 0x2000}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description_impl_util.go:310 +0x1d9 gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).Read(0xc0013b80e0, {0x21b8b30, 0xc00320d208}, {{0x21ae4b8, 0xc001713008}, {0x0, 0x1, 0x200000006140, 0x2000}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description_impl_util.go:337 +0x128 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*DynamicBytesFD).Read(0xc0013b80e0, {0x21b8b30, 0xc00320d208}, {{0x21ae4b8, 0xc001713008}, {0x0, 0x1, 0x200000006140, 0x2000}, {0x0, ...}}, ...) pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go:128 +0xa5 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Read(0xc0013b8140, {0x21b8b30, 0xc00320d208}, {{0x21ae4b8, 0xc001713008}, {0x0, 0x1, 0x200000006140, 0x2000}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description.go:653 +0x154 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.read(0xc00320d208, 0xc0013b8140, {{0x21ae4b8, 0xc001713008}, {0x0, 0x1, 0x200000006140, 0x2000}, {0x0, 0x1}}, ...) pkg/sentry/syscalls/linux/sys_read_write.go:93 +0xa5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Read(0xc00320d208, 0x457b27?, {{0x4}, {0x200000006140}, {0x2000}, {0x4}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_read_write.go:62 +0x38f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00320d208, 0x0, {{0x4}, {0x200000006140}, {0x2000}, {0x4}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00320d208, 0x0, {{0x4}, {0x200000006140}, {0x2000}, {0x4}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00320d208, 0x0, {{0x4}, {0x200000006140}, {0x2000}, {0x4}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00320d208) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00320d208?, 0xc00320d208) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00320d208, 0x152) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1576 pkg/sentry/kernel/task_start.go:416 +0x17e