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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-03-03 21:54:21 +0300 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-03-31 10:41:28 +0100 |
| commit | 182fe5abd8ebbb3a00c1be91f44e4783e139918c (patch) | |
| tree | 7404993656166f2b7cb78e54e4275d44336ba27c /fs/gfs2/bmap.c | |
| parent | 105284970ba7d0d0ff4b97e57728eac7adf6a42a (diff) | |
| download | lwn-182fe5abd8ebbb3a00c1be91f44e4783e139918c.tar.gz lwn-182fe5abd8ebbb3a00c1be91f44e4783e139918c.zip | |
[GFS2] possible null pointer dereference fixup
gfs2_alloc_get may fail so we have to check it to prevent
NULL pointer dereference.
Signed-off-by: Cyrill Gorcunov <gorcunov@gamil.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/bmap.c')
| -rw-r--r-- | fs/gfs2/bmap.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index c1ee6355ced1..f7093aa69aae 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -900,6 +900,8 @@ static int do_grow(struct gfs2_inode *ip, u64 size) int error; al = gfs2_alloc_get(ip); + if (!al) + return -ENOMEM; error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); if (error) @@ -1081,7 +1083,8 @@ static int trunc_dealloc(struct gfs2_inode *ip, u64 size) lblock = (size - 1) >> sdp->sd_sb.sb_bsize_shift; find_metapath(sdp, lblock, &mp, ip->i_height); - gfs2_alloc_get(ip); + if (!gfs2_alloc_get(ip)) + return -ENOMEM; error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); if (error) |