diff mbox

[2/2] ocfs2: add necessary check in case sb_getblk fails

Message ID 1378191128-11996-2-git-send-email-rui.xiang@huawei.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rui Xiang Sept. 3, 2013, 6:52 a.m. UTC 
Sb_getblk may retrun an err, so add a check for bh.

Signed-off-by: Rui Xiang <rui.xiang@huawei.com>
---
 fs/ocfs2/refcounttree.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox

Patch

diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index 50c1796..22f3f19 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -612,6 +612,11 @@  static int ocfs2_create_refcount_tree(struct inode *inode,
 	}
 
 	new_bh = sb_getblk(inode->i_sb, first_blkno);
+	if (!new_bh) {
+		ret = -ENOMEM;
+		mlog_errno(ret);
+		goto out_commit;
+	}
 	ocfs2_set_new_buffer_uptodate(&new_tree->rf_ci, new_bh);
 
 	ret = ocfs2_journal_access_rb(handle, &new_tree->rf_ci, new_bh,