Commit f5be3e29 authored by Al Viro's avatar Al Viro
Browse files

fix bogus read_seqretry() checks introduced in b37199e6 



read_seqretry() returns true on mismatch, not on match...

Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 6f18493e

fs/namei.c

+2 −2
Original line number Diff line number Diff line
@@ -1137,7 +1137,7 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path, 
		 */

		*inode = path->dentry->d_inode;

	}

	return read_seqretry(&mount_lock, nd->m_seq) &&

	return !read_seqretry(&mount_lock, nd->m_seq) &&

		!(path->dentry->d_flags & DCACHE_NEED_AUTOMOUNT);

}
@@ -1174,7 +1174,7 @@ static int follow_dotdot_rcu(struct nameidata *nd) 
		nd->path.mnt = &mounted->mnt;

		nd->path.dentry = mounted->mnt.mnt_root;

		nd->seq = read_seqcount_begin(&nd->path.dentry->d_seq);

		if (!read_seqretry(&mount_lock, nd->m_seq))

		if (read_seqretry(&mount_lock, nd->m_seq))

			goto failed;

	}

	nd->inode = nd->path.dentry->d_inode;