From: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Date: Fri, 25 Mar 2011 17:09:54 +0000 (+0200)
Subject: UBIFS: fix oops on error path in read_pnode
X-Git-Tag: v2.6.27.59~45
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=acd3bc5b828d5f7b4a52259467de573f73498bf1;p=thirdparty%2Fkernel%2Fstable.git

UBIFS: fix oops on error path in read_pnode

commit 54acbaaa523ca0bd284a18f67ad213c379679e86 upstream.

Thanks to coverity which spotted that UBIFS will oops if 'kmalloc()'
in 'read_pnode()' fails and we dereference a NULL 'pnode' pointer
when we 'goto out'.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index 9ff2463177e50..700a9258192a9 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1240,10 +1240,9 @@ static int read_pnode(struct ubifs_info *c, struct ubifs_nnode *parent, int iip)
 	lnum = branch->lnum;
 	offs = branch->offs;
 	pnode = kzalloc(sizeof(struct ubifs_pnode), GFP_NOFS);
-	if (!pnode) {
-		err = -ENOMEM;
-		goto out;
-	}
+	if (!pnode)
+		return -ENOMEM;
+
 	if (lnum == 0) {
 		/*
 		 * This pnode was not written which just means that the LEB