reiserfs: Fix warning and inode leak when deleting inode with xattrs

After commit 21d8a15a (lookup_one_len: don't accept . and ..) reiserfs
started failing to delete xattrs from inode. This was due to a buggy
test for '.' and '..' in fill_with_dentries() which resulted in passing
'.' and '..' entries to lookup_one_len() in some cases. That returned
error and so we failed to iterate over all xattrs of and inode.

Fix the test in fill_with_dentries() along the lines of the one in
lookup_one_len().

Reported-by: Pawel Zawora <pzawora@gmail.com>
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index c196369..4cce1d9 100644 (file)
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -187,8 +187,8 @@ fill_with_dentries(void *buf, const char *name, int namelen, loff_t offset,
        if (dbuf->count == ARRAY_SIZE(dbuf->dentries))
                return -ENOSPC;
 
-       if (name[0] == '.' && (name[1] == '\0' ||
-                              (name[1] == '.' && name[2] == '\0')))
+       if (name[0] == '.' && (namelen < 2 ||
+                              (namelen == 2 && name[1] == '.')))
                return 0;
 
        dentry = lookup_one_len(name, dbuf->xadir, namelen);