panic: nested locking: tmpfs.filesystemRWMutex: goroutine 237331 [running]: gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystemRWMutex).Lock(0xc00c382af8) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/filesystem_mutex.go:31 +0x3c gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).doCreateAt(0xc00c382a90, {0x1f98aa0, 0xc00be2f908}, 0xc002de6488, 0x1, 0xc00a68b408) pkg/sentry/fsimpl/tmpfs/filesystem.go:171 +0x85 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).MkdirAt(0xc00c382a90, {0x1f98aa0, 0xc00be2f908}, 0xc002de6488, {0xb448?, 0x68?}) pkg/sentry/fsimpl/tmpfs/filesystem.go:301 +0xf4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc00027d1e0, {0x1f98aa0, 0xc00be2f908}, 0xc00d46f500, 0xc00a68b5a8, 0xc00a68b544) pkg/sentry/vfs/vfs.go:372 +0x298 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc00be2f908, 0xffffff9c, 0x200000c0, 0x1ff) pkg/sentry/syscalls/linux/sys_file.go:950 +0x2ca gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc00be2f908, 0x0?, {{0xffffff9c}, {0x200000c0}, {0x1ff}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:937 +0x36 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00be2f908, 0x102, {{0xffffff9c}, {0x200000c0}, {0x1ff}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x995 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00be2f908, 0x102, {{0xffffff9c}, {0x200000c0}, {0x1ff}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00be2f908, 0x102, {{0xffffff9c}, {0x200000c0}, {0x1ff}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00be2f908) pkg/sentry/kernel/task_syscall.go:258 +0x4b0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00be2f908?, 0xc00be2f908) pkg/sentry/kernel/task_run.go:269 +0x1fae gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00be2f908, 0xf9d4) pkg/sentry/kernel/task_run.go:97 +0x4fb created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 237229 pkg/sentry/kernel/task_start.go:400 +0x165