panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 839 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000383220, 0xc002803178) bazel-out/aarch64-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x190 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc00020f050, 0xc000383200, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x34c gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc00020f050, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x268 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc000cfb250) bazel-out/aarch64-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x40 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc00249fb00, {0x1ca5578, 0xc00206b208}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0x94 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(...) pkg/sentry/vfs/dentry.go:156 gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc000246d10?, 0xc00249fb00?}, {0x1ca5578, 0xc00206b208}) pkg/sentry/vfs/vfs.go:1114 +0x6c gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).SetWorkingDirectory(0xc0020fc800, {0x1ca5578, 0xc00206b208}, {0xc000246d10, 0xc00216d7a0}) pkg/sentry/kernel/fs_context.go:144 +0x154 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Fchdir(0xc00206b208, 0x47cb80?, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:361 +0x1f8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00206b208, 0x32, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x690 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00206b208, 0x32, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00206b208, 0x32, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x78 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00206b208) pkg/sentry/kernel/task_syscall.go:258 +0x3c0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00206b208?, 0xc00206b208) pkg/sentry/kernel/task_run.go:269 +0x1568 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00206b208, 0x7d) pkg/sentry/kernel/task_run.go:97 +0x394 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 837 pkg/sentry/kernel/task_start.go:416 +0x13c known lock chain: kernfs.filesystemRWMutex -> kernel.taskSetRWMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskSetRWMutex ===== goroutine 152 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskSetRWMutex).RLock(0xc00051e000) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/taskset_mutex.go:59 +0x40 gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IDOfThreadGroup(0xc0002362a0, 0xc000315808) pkg/sentry/kernel/threads.go:328 +0x44 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Readlink(0xc0001e7490, {0x1ca5578, 0xc000174008}, 0xaddb54?) pkg/sentry/fsimpl/proc/tasks_files.go:62 +0xa8 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Getlink(0xc0001e7490, {0x1ca5578, 0xc000174008}, 0xc000231a20) pkg/sentry/fsimpl/proc/tasks_files.go:70 +0x44 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc00023a300, {0x1ca5578, 0xc000174008}, 0xc000700908, 0xc0005deea0) pkg/sentry/fsimpl/kernfs/filesystem.go:83 +0x3a0 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc00023a300, {0x1ca5578, 0xc000174008}, 0xc000700908) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0xb0 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc00023a300, {0x1ca5578, 0xc000174008}, 0xc000700908) pkg/sentry/fsimpl/kernfs/filesystem.go:697 +0xc4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc000278600, {0x1ca5578, 0xc000174008}, 0xc0006101e0, 0xc000047560) pkg/sentry/vfs/vfs.go:512 +0xc4 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc000174008, 0xffffff9c, 0x4000110070, 0x4000122d00, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x17c gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc000174008, 0x47cb80?, {{0xffffffffffffff9c}, {0x4000110070}, {0x4000122d00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0x3c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000174008, 0x4e, {{0xffffffffffffff9c}, {0x4000110070}, {0x4000122d00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x690 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000174008, 0x4e, {{0xffffffffffffff9c}, {0x4000110070}, {0x4000122d00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000174008, 0x4e, {{0xffffffffffffff9c}, {0x4000110070}, {0x4000122d00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x78 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000174008) pkg/sentry/kernel/task_syscall.go:258 +0x3c0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000174008?, 0xc000174008) pkg/sentry/kernel/task_run.go:269 +0x1568 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000174008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x394 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x13c ====== kernel.taskSetRWMutex -> kernel.fsContextMutex ===== goroutine 178 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc00064f2c8) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x40 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).checkAndPreventSharingOutsideTG(0xc00064f2c0, 0xc000317c08) pkg/sentry/kernel/fs_context.go:209 +0xe0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExecveAfterExecveCredsLock).execute(0xc0002892c0, 0xc000684008) pkg/sentry/kernel/task_exec.go:156 +0x244 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000684008, 0xf) pkg/sentry/kernel/task_run.go:97 +0x394 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 135 pkg/sentry/kernel/task_start.go:416 +0x13c