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| author | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-16 13:01:26 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-01-16 13:01:26 -0500 |
| commit | 7b43a79f32c0a05e7562043af98e25c05c89b18e (patch) | |
| tree | 920010b3bad9bd2cb7b9f4f2a7305a40400758da | |
| parent | df1a1ad29739f032f8905310796e558589403d61 (diff) | |
| download | linux-7b43a79f32c0a05e7562043af98e25c05c89b18e.tar.gz linux-7b43a79f32c0a05e7562043af98e25c05c89b18e.tar.bz2 linux-7b43a79f32c0a05e7562043af98e25c05c89b18e.zip | |
mnt_flags fixes in do_remount()
* need vfsmount_lock over modifying it
* need to preserve MNT_SHARED/MNT_UNBINDABLE
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/namespace.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 4de493ea67cf..779293e29b85 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1536,8 +1536,12 @@ static int do_remount(struct path *path, int flags, int mnt_flags, err = change_mount_flags(path->mnt, flags); else err = do_remount_sb(sb, flags, data, 0); - if (!err) + if (!err) { + spin_lock(&vfsmount_lock); + mnt_flags |= path->mnt->mnt_flags & MNT_PNODE_MASK; path->mnt->mnt_flags = mnt_flags; + spin_unlock(&vfsmount_lock); + } up_write(&sb->s_umount); if (!err) { security_sb_post_remount(path->mnt, flags, data); |