panic: nested locking: tmpfs.filesystemRWMutex: goroutine 374256 [running]: gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystemRWMutex).Lock(0xc010d342d8) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/tmpfs/filesystem_mutex.go:31 +0x3c gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).doCreateAt(0xc010d34270, {0x1f95f00, 0xc0191d4c88}, 0xc01380a908, 0x1, 0xc01015b408) pkg/sentry/fsimpl/tmpfs/filesystem.go:171 +0x85 gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).MkdirAt(0xc010d34270, {0x1f95f00, 0xc0191d4c88}, 0xc01380a908, {0xb448?, 0x15?}) pkg/sentry/fsimpl/tmpfs/filesystem.go:301 +0xf4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc0002d11e0, {0x1f95f00, 0xc0191d4c88}, 0xc014aee7e0, 0xc01015b5a8, 0xc01015b544) pkg/sentry/vfs/vfs.go:372 +0x298 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc0191d4c88, 0xffffff9c, 0x20000000, 0x0) pkg/sentry/syscalls/linux/sys_file.go:950 +0x2ca gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc0191d4c88, 0x0?, {{0xffffffffffffff9c}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:937 +0x36 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0191d4c88, 0x102, {{0xffffffffffffff9c}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x995 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0191d4c88, 0x102, {{0xffffffffffffff9c}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0191d4c88, 0x102, {{0xffffffffffffff9c}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0191d4c88) pkg/sentry/kernel/task_syscall.go:258 +0x4b0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0191d4c88?, 0xc0191d4c88) pkg/sentry/kernel/task_run.go:269 +0x1fae gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0191d4c88, 0x88e7) pkg/sentry/kernel/task_run.go:97 +0x4fb created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 374367 pkg/sentry/kernel/task_start.go:400 +0x165