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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-03-03 19:54:21 +0100 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2008-03-31 11:41:28 +0200 |
| commit | 182fe5abd8ebbb3a00c1be91f44e4783e139918c (patch) | |
| tree | 7404993656166f2b7cb78e54e4275d44336ba27c /fs/gfs2/ops_inode.c | |
| parent | [GFS2] Need to ensure that sector_t is 64bits for GFS2 (diff) | |
| download | linux-182fe5abd8ebbb3a00c1be91f44e4783e139918c.tar.xz linux-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/ops_inode.c')
| -rw-r--r-- | fs/gfs2/ops_inode.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c index 6cbbb5b46ce4..34fe571e15ee 100644 --- a/fs/gfs2/ops_inode.c +++ b/fs/gfs2/ops_inode.c @@ -200,6 +200,10 @@ static int gfs2_link(struct dentry *old_dentry, struct inode *dir, if (alloc_required) { struct gfs2_alloc *al = gfs2_alloc_get(dip); + if (!al) { + error = -ENOMEM; + goto out_gunlock; + } error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); if (error) @@ -716,6 +720,10 @@ static int gfs2_rename(struct inode *odir, struct dentry *odentry, if (alloc_required) { struct gfs2_alloc *al = gfs2_alloc_get(ndip); + if (!al) { + error = -ENOMEM; + goto out_gunlock; + } error = gfs2_quota_lock(ndip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); if (error) @@ -953,7 +961,8 @@ static int setattr_chown(struct inode *inode, struct iattr *attr) if (!(attr->ia_valid & ATTR_GID) || ogid == ngid) ogid = ngid = NO_QUOTA_CHANGE; - gfs2_alloc_get(ip); + if (!gfs2_alloc_get(ip)) + return -ENOMEM; error = gfs2_quota_lock(ip, nuid, ngid); if (error) |