linux-kernel - [PATCH] reiserfs: fix dereference of ERR

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Message-Id: <1453293362-22893-1-git-send-email-sudipm.mukherjee@gmail.com>
Date:	Wed, 20 Jan 2016 18:06:02 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, reiserfs-devel@...r.kernel.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH] reiserfs: fix dereference of ERR_PTR

reiserfs_iget() returns either NULL or error code in ERR_PTR. And we
were only checking for NULL, so in case of some other error we will try
to dereference the ERR_PTR(-errno) thinking it to be a valid pointer.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---
 fs/reiserfs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 05db747..c0306ec 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -288,7 +288,7 @@ static int finish_unfinished(struct super_block *s)
 		pathrelse(&path);
 
 		inode = reiserfs_iget(s, &obj_key);
-		if (!inode) {
+		if (IS_ERR_OR_NULL(inode)) {
 			/*
 			 * the unlink almost completed, it just did not
 			 * manage to remove "save" link and release objectid
-- 
1.9.1