| commit | a395811b01e1ee40198749e45eeaf56d0093a7b6 | |
| author | Jeff Layton <jlayton@redhat.com> | |
| Tue, 26 Jan 2010 13:35:35 +0000 (26 08:35 -0500) | ||
| committer | Karolin Seeger <kseeger@samba.org> | |
| Mon, 29 Mar 2010 07:40:59 +0000 (29 09:40 +0200) | ||
| tree | 39556bf29ac941378e9c1febce6bd754accd83db | treesnapshot (tar.gz zip) |
| parent | fc8689cf9ec4588d57d734999d524f6725d34b1d | commitdiff |
mount.cifs: take extra care that mountpoint isn't changed during mount
It's possible to trick mount.cifs into mounting onto the wrong directory
by replacing the mountpoint with a symlink to a directory. mount.cifs
attempts to check the validity of the mountpoint, but there's still a
possible race between those checks and the mount(2) syscall.
To guard against this, chdir to the mountpoint very early, and only deal
with it as "." from then on out.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
(cherry picked from commit a60afceaa71c0c9b53b2ec1014db5d09d777803d)
It's possible to trick mount.cifs into mounting onto the wrong directory
by replacing the mountpoint with a symlink to a directory. mount.cifs
attempts to check the validity of the mountpoint, but there's still a
possible race between those checks and the mount(2) syscall.
To guard against this, chdir to the mountpoint very early, and only deal
with it as "." from then on out.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
(cherry picked from commit a60afceaa71c0c9b53b2ec1014db5d09d777803d)
| client/mount.cifs.c | diffblobblamehistory |