diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-07-28 17:10:56 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-17 09:19:21 -0700 |
| commit | 9810174c0384f725a31be1dfc64a881695ad465d (patch) | |
| tree | a1d00d468b3041e80988fecbf81a359743711397 /kernel/itimer.c | |
| parent | 98e68ce8f4a6d3ad72243eecd1022ba120b515d2 (diff) | |
mnt: Move the test for MNT_LOCK_READONLY from change_mount_flags into do_remount
commit 07b645589dcda8b7a5249e096fece2a67556f0f4 upstream.
There are no races as locked mount flags are guaranteed to never change.
Moving the test into do_remount makes it more visible, and ensures all
filesystem remounts pass the MNT_LOCK_READONLY permission check. This
second case is not an issue today as filesystem remounts are guarded
by capable(CAP_DAC_ADMIN) and thus will always fail in less privileged
mount namespaces, but it could become an issue in the future.
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/itimer.c')
0 files changed, 0 insertions, 0 deletions