panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 347 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc0002b1190, 0xc0007cf160) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x1e8 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc0001a1050, 0xc0002b1170, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x48a gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc0001a1050, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x2ec gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc000a2edd0) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x3c gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0008761b0, {0x2116790, 0xc000b70008}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0xaf gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(...) pkg/sentry/vfs/dentry.go:156 gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc0001dca50?, 0xc0008761b0?}, {0x2116790, 0xc000b70008}) pkg/sentry/vfs/vfs.go:1114 +0x6b gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).SetWorkingDirectory(0xc000a88040, {0x2116790, 0xc000b70008}, {0xc0001dca50, 0xc000877170}) pkg/sentry/kernel/fs_context.go:144 +0x1f2 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Fchdir(0xc000b70008, 0xc000608980?, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:361 +0x325 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000b70008, 0x51, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x94c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000b70008, 0x51, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000b70008, 0x51, {{0x3}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000b70008) pkg/sentry/kernel/task_syscall.go:258 +0x490 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000b70008?, 0xc000b70008) pkg/sentry/kernel/task_run.go:269 +0x1ec9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000b70008, 0x43) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 403 pkg/sentry/kernel/task_start.go:416 +0x15c known lock chain: kernfs.filesystemRWMutex -> kernel.taskSetRWMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskSetRWMutex ===== goroutine 95 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskSetRWMutex).RLock(0xc00027e000) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/taskset_mutex.go:59 +0x3c gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IDOfThreadGroup(0xc0001e6230, 0xc000244408) pkg/sentry/kernel/threads.go:328 +0x45 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Readlink(0xc0001e6380, {0x2116790, 0xc000450008}, 0x489e69?) pkg/sentry/fsimpl/proc/tasks_files.go:62 +0xb8 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Getlink(0xc0001e6380, {0x2116790, 0xc000450008}, 0xc00044f340) pkg/sentry/fsimpl/proc/tasks_files.go:70 +0x45 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc00044a540, {0x2116790, 0xc000450008}, 0xc000208d88, 0xc00033bb90) pkg/sentry/fsimpl/kernfs/filesystem.go:83 +0x4cf gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc00044a540, {0x2116790, 0xc000450008}, 0xc000208d88) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0xc5 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc00044a540, {0x2116790, 0xc000450008}, 0xc000208d88) pkg/sentry/fsimpl/kernfs/filesystem.go:697 +0x136 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc0000045e0, {0x2116790, 0xc000450008}, 0xc000446300, 0xc000049588) pkg/sentry/vfs/vfs.go:512 +0xed gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc000450008, 0xffffff9c, 0xc0000c0070, 0xc0000b6d80, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x26c gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc000450008, 0xc00055c090?, {{0xffffffffffffff9c}, {0xc0000c0070}, {0xc0000b6d80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0x46 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000450008, 0x10b, {{0xffffffffffffff9c}, {0xc0000c0070}, {0xc0000b6d80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x94c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000450008, 0x10b, {{0xffffffffffffff9c}, {0xc0000c0070}, {0xc0000b6d80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000450008, 0x10b, {{0xffffffffffffff9c}, {0xc0000c0070}, {0xc0000b6d80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000450008) pkg/sentry/kernel/task_syscall.go:258 +0x490 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000450008?, 0xc000450008) pkg/sentry/kernel/task_run.go:269 +0x1ec9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000450008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x15c ====== kernel.taskSetRWMutex -> kernel.fsContextMutex ===== goroutine 156 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc00068d3c8) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x3c gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).checkAndPreventSharingOutsideTG(0xc00068d3c0, 0xc000245c08) pkg/sentry/kernel/fs_context.go:209 +0x130 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExecveAfterExecveCredsLock).execute(0xc0002fb8c0, 0xc0002a3908) pkg/sentry/kernel/task_exec.go:156 +0x388 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0002a3908, 0x14) pkg/sentry/kernel/task_run.go:97 +0x4ca created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 182 pkg/sentry/kernel/task_start.go:416 +0x15c