cluster: RHEL6 - libgfs2: Fix null pointer dereference in linked_leaf_search
Gitweb:
http://git.fedorahosted.org/git/cluster.git?p=cluster.git;a=commitdiff;h=...
Commit: 2552e504f228f2e6dafee9f43666fda871fdb92e
Parent: 5c7611a6579afd3da91845b2c1004768e2833420
Author: Bob Peterson <rpeterso(a)redhat.com>
AuthorDate: Thu Jan 12 15:31:18 2012 -0600
Committer: Bob Peterson <rpeterso(a)redhat.com>
CommitterDate: Fri Jan 20 08:26:28 2012 -0600
libgfs2: Fix null pointer dereference in linked_leaf_search
Fix a null pointer dereference by checking the value of the bh set by
get_first_leaf(). Looking down the call tree the bh is set to NULL when
__bread fails to allocate memory so we can use errno as the return value
here.
rhbz#675723
---
gfs2/fsck/lost_n_found.c | 3 +--
gfs2/libgfs2/fs_ops.c | 2 ++
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/gfs2/fsck/lost_n_found.c b/gfs2/fsck/lost_n_found.c
index 6f09de1..d0e036a 100644
--- a/gfs2/fsck/lost_n_found.c
+++ b/gfs2/fsck/lost_n_found.c
@@ -160,8 +160,7 @@ int add_inode_to_lf(struct gfs2_inode *ip){
lf_dip = createi(sdp->md.rooti, "lost+found",
S_IFDIR | 0700, 0);
if (lf_dip == NULL) {
- log_crit(_("Error %d creating lost+found: %s\n"),
- errno);
+ log_crit(_("Error %d creating lost+found\n"), errno);
exit(FSCK_ERROR);
}
diff --git a/gfs2/libgfs2/fs_ops.c b/gfs2/libgfs2/fs_ops.c
index 4f1774c..330cedd 100644
--- a/gfs2/libgfs2/fs_ops.c
+++ b/gfs2/libgfs2/fs_ops.c
@@ -1514,6 +1514,8 @@ static int linked_leaf_search(struct gfs2_inode *dip, const char
*filename,
error = get_first_leaf(dip, lindex, &bh_next);
if (error)
return error;
+ if (bh_next == NULL)
+ return errno;
/* Find the entry */
do{