[PATCH 101/102] reiserfs: Fix warning and inode leak when deleting inode with xattrs

From: Luis Henriques
Date: Mon Apr 08 2013 - 05:53:58 EST


3.5.7.10 -stable review patch. If anyone has any objections, please let me know.

------------------

From: Jan Kara <jack@xxxxxxx>

commit 35e5cbc0af240778e61113286c019837e06aeec6 upstream.

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@xxxxxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
fs/reiserfs/xattr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 46fc1c2..048d990 100644
--- 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);
--
1.8.1.2

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