From 7b43a79f32c0a05e7562043af98e25c05c89b18e Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 16 Jan 2010 13:01:26 -0500 Subject: mnt_flags fixes in do_remount() * need vfsmount_lock over modifying it * need to preserve MNT_SHARED/MNT_UNBINDABLE Signed-off-by: Al Viro --- fs/namespace.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'fs/namespace.c') diff --git a/fs/namespace.c b/fs/namespace.c index 4de493ea67c..779293e29b8 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); -- cgit v1.2.3