panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 8055 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc0003c1220, 0xc001cdf8a0) bazel-out/aarch64-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x29c gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00023b050, 0xc0003c1200, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x3a0 gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc00023b050, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x2fc gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc001096050) bazel-out/aarch64-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x50 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc000ca6990, {0x1d61bb8, 0xc001cb7208}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0xe8 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc000ca6990, {0x1d61bb8, 0xc001cb7208}) pkg/sentry/vfs/dentry.go:156 +0x6c gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc0006aed10?, 0xc000ca6990?}, {0x1d61bb8, 0xc001cb7208}) pkg/sentry/vfs/vfs.go:1114 +0x58 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc000a3f240, {0x1d61bb8, 0xc001cb7208}) pkg/sentry/kernel/fs_context.go:73 +0x120 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef.func1() pkg/sentry/kernel/fs_context.go:87 +0x58 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc000a3f240, 0xc001cdfcf8) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xa0 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc000a3f240, {0x1d61bb8, 0xc001cb7208}) pkg/sentry/kernel/fs_context.go:86 +0x90 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc001cb7208?, 0xc001cb7208) pkg/sentry/kernel/task_exit.go:301 +0x5cc gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001cb7208, 0x9c4) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 8051 pkg/sentry/kernel/task_start.go:416 +0x160 known lock chain: kernfs.filesystemRWMutex -> kernel.taskSetRWMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskSetRWMutex ===== goroutine 62 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskSetRWMutex).RLock(0xc0006525a0) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/taskset_mutex.go:59 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IDOfThreadGroup(0xc0001d56c0, 0xc00048cc08) pkg/sentry/kernel/threads.go:328 +0x54 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Readlink(0xc0001443f0, {0x1d61bb8, 0xc00070c008}, 0xb51c0c?) pkg/sentry/fsimpl/proc/tasks_files.go:62 +0xa4 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Getlink(0xc0001443f0, {0x1d61bb8, 0xc00070c008}, 0xc0006aea50) pkg/sentry/fsimpl/proc/tasks_files.go:70 +0x54 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc0006560c0, {0x1d61bb8, 0xc00070c008}, 0xc000840008, 0xc000313710) pkg/sentry/fsimpl/kernfs/filesystem.go:83 +0x49c gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0006560c0, {0x1d61bb8, 0xc00070c008}, 0xc000840008) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0xe8 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc0006560c0, {0x1d61bb8, 0xc00070c008}, 0xc000840008) pkg/sentry/fsimpl/kernfs/filesystem.go:696 +0xd4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc00021a600, {0x1d61bb8, 0xc00070c008}, 0xc0005981e0, 0xc0000475a0) pkg/sentry/vfs/vfs.go:512 +0xe0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc00070c008, 0xffffff9c, 0x400000e090, 0x400007ed80, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x1f0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc00070c008, 0x62?, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0xac gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00070c008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x880 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00070c008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x60 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00070c008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xa8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00070c008) pkg/sentry/kernel/task_syscall.go:258 +0x45c gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00070c008?, 0xc00070c008) pkg/sentry/kernel/task_run.go:269 +0x1814 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00070c008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x160 ====== kernel.taskSetRWMutex -> kernel.fsContextMutex ===== goroutine 167 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc0007e2748) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).checkAndPreventSharingOutsideTG(0xc0007e2740, 0xc000236408) pkg/sentry/kernel/fs_context.go:207 +0xf0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExecveAfterExecveCredsLock).execute(0xc000599920, 0xc000868c88) pkg/sentry/kernel/task_exec.go:156 +0x298 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000868c88, 0x9) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 152 pkg/sentry/kernel/task_start.go:416 +0x160