Re: [PATCH] vfs: move_mount: reject moving kernel internal mounts

Eric Biggers
2019-07-01T16:45:42Z

On Sat, Jun 29, 2019 at 01:27:44PM -0700, Eric Biggers wrote:
>
> Reproducer:
>
> #include <unistd.h>
>
> #define __NR_move_mount 429
> #define MOVE_MOUNT_F_EMPTY_PATH 0x00000004
>
> int main()
> {
> int fds[2];
>
> pipe(fds);
> syscall(__NR_move_mount, fds[0], "", -1, "/", MOVE_MOUNT_F_EMPTY_PATH);
> }

David, I'd like to add this as a regression test somewhere.

Can you point me to the tests for the new mount syscalls?

I checked LTP, kselftests, and xfstests, but nothing to be found.

- Eric