panic: WARNING: circular locking detected: kernel.fsContextMutex -> tmpfs.filesystemRWMutex: goroutine 169160 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000173a00, 0xc000d0d270) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x1e8 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc000173b90, 0xc0001739e0, {0xc003170aa8, 0x1, 0x1}) pkg/sync/locking/lockdep.go:112 +0x48a gvisor.dev/gvisor/pkg/sync/locking.checkLock.func1(0xc0001739e0, 0xc000d0d3f8?) pkg/sync/locking/lockdep.go:115 +0x65 gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000398e30, 0xc000d0d4b0) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x1e8 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc000173b90, 0xc000398e10, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x48a gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc000173b90, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x2ec gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystemRWMutex).Lock(0xc000d7ae38) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/filesystem_mutex.go:31 +0x3c gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).Release(0xc000d7add0, {0x2112f90, 0xc001c5b908}) pkg/sentry/fsimpl/tmpfs/tmpfs.go:356 +0x8f gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef.func1() pkg/sentry/vfs/filesystem.go:83 +0x102 gvisor.dev/gvisor/pkg/sentry/vfs.(*FilesystemRefs).DecRef(0xc000d7add0, 0xc000d0d810) bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/filesystem_refs.go:133 +0x6d gvisor.dev/gvisor/pkg/sentry/vfs.(*Filesystem).DecRef(0xc000d7add0, {0x2112f90, 0xc001c5b908}) pkg/sentry/vfs/filesystem.go:79 +0x94 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).unlockMounts(0xc0002a45e0, {0x2112f90, 0xc001c5b908}) pkg/sentry/vfs/vfs.go:1059 +0x23e gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).destroy(0xc00035a210, {0x2112f90, 0xc001c5b908}) pkg/sentry/vfs/mount.go:979 +0x745 gvisor.dev/gvisor/pkg/sentry/vfs.(*Mount).DecRef(0xc00035a210, {0x2112f90, 0xc001c5b908}) pkg/sentry/vfs/mount.go:943 +0x6d gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc00035a210?, 0xc001d80408?}, {0x2112f90, 0xc001c5b908}) pkg/sentry/vfs/vfs.go:1115 +0x7f gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc0022cf040, {0x2112f90, 0xc001c5b908}) pkg/sentry/kernel/fs_context.go:73 +0x153 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute.(*FSContext).DecRef.func2() pkg/sentry/kernel/fs_context.go:87 +0x47 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc0022cf040, 0xc000d0dda0) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0x6d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(...) pkg/sentry/kernel/fs_context.go:86 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc001c5b908?, 0xc001c5b908) pkg/sentry/kernel/task_exit.go:301 +0x82b gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001c5b908, 0xce21) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 169158 pkg/sentry/kernel/task_start.go:416 +0x15c known lock chain: tmpfs.filesystemRWMutex -> vfs.inotifyEventMutex -> mm.mappingRWMutex -> kernel.fsContextMutex ====== tmpfs.filesystemRWMutex -> vfs.inotifyEventMutex ===== goroutine 82941 [running]: gvisor.dev/gvisor/pkg/sentry/vfs.(*inotifyEventMutex).Lock(0xc0008cc178) bazel-out/k8-fastbuild/bin/pkg/sentry/vfs/inotify_event_mutex.go:33 +0x3c gvisor.dev/gvisor/pkg/sentry/vfs.(*Inotify).queueEvent(0xc0008cc0e0, 0xc0010a3640) pkg/sentry/vfs/inotify.go:276 +0x46 gvisor.dev/gvisor/pkg/sentry/vfs.(*Watch).Notify(0xc000f37c20, {0xc002f28d02, 0x5}, 0x40000100, 0x0) pkg/sentry/vfs/inotify.go:604 +0x287 gvisor.dev/gvisor/pkg/sentry/vfs.(*Watches).Notify(0xc0043773a0, {0x2112f90, 0xc003123208}, {0xc002f28d02, 0x5}, 0x40000100, 0x0, 0x1, 0x0) pkg/sentry/vfs/inotify.go:476 +0x1b8 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).doCreateAt(0xc0001b8c30, {0x2112f90, 0xc003123208}, 0xc00109c488, 0x1, 0xc000cd1408) pkg/sentry/fsimpl/tmpfs/filesystem.go:218 +0x4f6 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).MkdirAt(0xc0001b8c30, {0x2112f90, 0xc003123208}, 0xc00109c488, {0x0?, 0x41?}) pkg/sentry/fsimpl/tmpfs/filesystem.go:301 +0xf4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc0002a45e0, {0x2112f90, 0xc003123208}, 0xc0033a5680, 0xc000cd15a8, 0xc000cd1544) pkg/sentry/vfs/vfs.go:372 +0x28a gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc003123208, 0xffffff9c, 0x200000000180, 0x0) pkg/sentry/syscalls/linux/sys_file.go:954 +0x2c5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdir(0xc003123208, 0xc002c19d00?, {{0x200000000180}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:933 +0x36 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc003123208, 0x53, {{0x200000000180}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x94c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc003123208, 0x53, {{0x200000000180}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc003123208, 0x53, {{0x200000000180}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc003123208) pkg/sentry/kernel/task_syscall.go:258 +0x490 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc003123208?, 0xc003123208) pkg/sentry/kernel/task_run.go:269 +0x1ec9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc003123208, 0x6492) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 82938 pkg/sentry/kernel/task_start.go:416 +0x15c ====== vfs.inotifyEventMutex -> mm.mappingRWMutex ===== goroutine 2945 [running]: gvisor.dev/gvisor/pkg/sentry/mm.(*mappingRWMutex).RLock(0xc000b7705c) bazel-out/k8-fastbuild/bin/pkg/sentry/mm/mapping_mutex.go:59 +0x3c gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc000b77008, {0x2112f90, 0xc000994588}, {0xc000a7ed88?, 0xc000a1eed8?}, {0xf4?, 0xb6?, 0x41?}, 0x0, 0xc00073aed0) pkg/sentry/mm/io.go:545 +0xf4 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc000b77008, {0x2112f90, 0xc000994588}, 0x200000001fc0, {0xc0029c83d0, 0x10, 0x10}, {0x53?, 0xae?}) pkg/sentry/mm/io.go:130 +0x26a gvisor.dev/gvisor/pkg/usermem.CopyOutVec({0x2112f90, 0xc000994588}, {0x2108718, 0xc000b77008}, {0x0?, 0x2dcbdc0?, 0xb81?, 0xc000172a00?}, {0xc0029c83d0, 0x10, ...}, ...) pkg/usermem/usermem.go:264 +0x1db gvisor.dev/gvisor/pkg/usermem.IOSequence.CopyOut(...) pkg/usermem/usermem.go:482 gvisor.dev/gvisor/pkg/sentry/vfs.(*Event).CopyTo(0xc0013c5000, {0x2112f90, 0xc000994588}, {0xc0029c83d0, 0x10, 0x10}, {{0x2108718, 0xc000b77008}, {0x0, 0x1, ...}, ...}) pkg/sentry/vfs/inotify.go:693 +0x590 gvisor.dev/gvisor/pkg/sentry/vfs.(*Inotify).Read(0xc000592000, {0x2112f90, 0xc000994588}, {{0x2108718, 0xc000b77008}, {0x0, 0x1, 0x200000001fc0, 0x2020}, {0x0, ...}}, ...) pkg/sentry/vfs/inotify.go:244 +0x53c gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Read(0xc000592000, {0x2112f90, 0xc000994588}, {{0x2108718, 0xc000b77008}, {0x0, 0x1, 0x200000001fc0, 0x2020}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description.go:653 +0x14f gvisor.dev/gvisor/pkg/sentry/syscalls/linux.read(0xc000994588, 0xc000592000, {{0x2108718, 0xc000b77008}, {0x0, 0x1, 0x200000001fc0, 0x2020}, {0x0, 0x1}}, ...) pkg/sentry/syscalls/linux/sys_read_write.go:93 +0x91 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Read(0xc000994588, 0xc001d5ce60?, {{0x3}, {0x200000001fc0}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_read_write.go:62 +0x2b2 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000994588, 0x0, {{0x3}, {0x200000001fc0}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x94c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000994588, 0x0, {{0x3}, {0x200000001fc0}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000994588, 0x0, {{0x3}, {0x200000001fc0}, {0x2020}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000994588) pkg/sentry/kernel/task_syscall.go:258 +0x490 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000994588?, 0xc000994588) pkg/sentry/kernel/task_run.go:269 +0x1ec9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000994588, 0x377) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 2940 pkg/sentry/kernel/task_start.go:416 +0x15c ====== mm.mappingRWMutex -> kernel.fsContextMutex ===== goroutine 1568 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc000e0a9c8) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x3c gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).RootDirectory(0xc000e0a9c0) pkg/sentry/kernel/fs_context.go:150 +0x4a gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).contextValue(0xc000d82588, {0x1c123e0, 0x20e1978}, 0x1) pkg/sentry/kernel/task_context.go:99 +0x5d8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Value(0xc000d82588, {0x1c123e0, 0x20e1978}) pkg/sentry/kernel/task_context.go:61 +0x4a gvisor.dev/gvisor/pkg/sentry/vfs.RootFromContext(...) pkg/sentry/vfs/context.go:88 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).MappedName(0xc0006c0a00, {0x2112f90, 0xc000d82588}) pkg/sentry/vfs/file_description.go:818 +0x77 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).appendVMAMapsEntryLocked(0xc00094905c?, {0x2112f90, 0xc000d82588}, {0xc0001d7208?, 0xc00019ef90?}, 0xc000665048) pkg/sentry/mm/procfs.go:129 +0x2a2 gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).ReadMapsDataInto(0xc000949008, {0x2112f90, 0xc000d82588}, 0xc000665048) pkg/sentry/mm/procfs.go:85 +0x185 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*mapsData).Generate(0xc000c98388, {0x2112f90, 0xc000d82588}, 0xc00106c1e0) pkg/sentry/fsimpl/proc/task_files.go:651 +0xa9 gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).preadLocked(0xc00106c1c0, {0x2112f90, 0xc000d82588}, {{0x2108718, 0xc000949008}, {0x0, 0x1, 0x200000000100, 0x1000}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description_impl_util.go:310 +0x18b gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).Read(0xc00106c1c0, {0x2112f90, 0xc000d82588}, {{0x2108718, 0xc000949008}, {0x0, 0x1, 0x200000000100, 0x1000}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description_impl_util.go:337 +0x117 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*DynamicBytesFD).Read(0xc00106c1c0, {0x2112f90, 0xc000d82588}, {{0x2108718, 0xc000949008}, {0x0, 0x1, 0x200000000100, 0x1000}, {0x0, ...}}, ...) pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go:128 +0x91 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Read(0xc00106c220, {0x2112f90, 0xc000d82588}, {{0x2108718, 0xc000949008}, {0x0, 0x1, 0x200000000100, 0x1000}, {0x0, ...}}, ...) pkg/sentry/vfs/file_description.go:653 +0x14f gvisor.dev/gvisor/pkg/sentry/syscalls/linux.read(0xc000d82588, 0xc00106c220, {{0x2108718, 0xc000949008}, {0x0, 0x1, 0x200000000100, 0x1000}, {0x0, 0x1}}, ...) pkg/sentry/syscalls/linux/sys_read_write.go:93 +0x91 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Read(0xc000d82588, 0xc0015887e0?, {{0x3}, {0x200000000100}, {0x1000}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_read_write.go:62 +0x2b2 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000d82588, 0x0, {{0x3}, {0x200000000100}, {0x1000}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x94c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000d82588, 0x0, {{0x3}, {0x200000000100}, {0x1000}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000d82588, 0x0, {{0x3}, {0x200000000100}, {0x1000}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000d82588) pkg/sentry/kernel/task_syscall.go:258 +0x490 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000d82588?, 0xc000d82588) pkg/sentry/kernel/task_run.go:269 +0x1ec9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000d82588, 0x1dd) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1669 pkg/sentry/kernel/task_start.go:416 +0x15c