On 17/03/2020 17:47, Al Viro wrote:
On Mon, Feb 24, 2020 at 05:02:11PM +0100, Mickaël Salaün wrote:
quoted
+static int get_path_from_fd(u64 fd, struct path *path)
quoted
+ /*
+ * Only allows O_PATH FD: enable to restrict ambiant (FS) accesses
+ * without requiring to open and risk leaking or misuing a FD. Accept
+ * removed, but still open directory (S_DEAD).
+ */
+ if (!(f.file->f_mode & FMODE_PATH) || !f.file->f_path.mnt ||
^^^^^^^^^^^^^^^^^^^
Could you explain what that one had been be about? The underlined
subexpression is always false; was that supposed to check some
condition and if so, which one?
This was just to be sure that the next assignment "path->mnt =
f.file->f_path.mnt;" always creates a valid path. If this is always
true, I will remove it.