diff options
author | Dave Jones <davej@redhat.com> | 2013-10-10 20:05:35 -0400 |
---|---|---|
committer | Ben Hutchings <ben@decadent.org.uk> | 2013-11-28 14:02:03 +0000 |
commit | 564d091beba05e7437c8fa1c31a1976f9e80479d (patch) | |
tree | b9e5d9fc1155fdb8ff720304c75f9576f8a23c7c | |
parent | 135528ae1e8b39dde4590b35138e5bdaaaf7b34b (diff) |
ext4: fix memory leak in xattr
commit 6e4ea8e33b2057b85d75175dd89b93f5e26de3bc upstream.
If we take the 2nd retry path in ext4_expand_extra_isize_ea, we
potentionally return from the function without having freed these
allocations. If we don't do the return, we over-write the previous
allocation pointers, so we leak either way.
Spotted with Coverity.
[ Fixed by tytso to set is and bs to NULL after freeing these
pointers, in case in the retry loop we later end up triggering an
error causing a jump to cleanup, at which point we could have a double
free bug. -- Ted ]
Signed-off-by: Dave Jones <davej@fedoraproject.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
-rw-r--r-- | fs/ext4/xattr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index d5498b2de8af..b4e9f3fcc3fd 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -1269,6 +1269,8 @@ retry: s_min_extra_isize) { tried_min_extra_isize++; new_extra_isize = s_min_extra_isize; + kfree(is); is = NULL; + kfree(bs); bs = NULL; goto retry; } error = -1; |