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| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-07-28 17:10:56 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-17 09:04:00 -0700 |
| commit | 81d4c13ebbdcb69b2d56b3bc5e626b1a881421cf (patch) | |
| tree | 11297f5addd6424eccbb955663f22c4d7b8fe0be /include/linux/mount.h | |
| parent | 8c30f22757c97041750fddce8ea11c6d7231574a (diff) | |
| download | linux-rt-81d4c13ebbdcb69b2d56b3bc5e626b1a881421cf.tar.gz | |
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 'include/linux/mount.h')
0 files changed, 0 insertions, 0 deletions