linux-kernel - [PATCH] ubifs: fix memory leak on error condition

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20181115203850.5774-1-garrmcnu@gmail.com>
Date:   Thu, 15 Nov 2018 20:38:50 +0000
From:   Garry McNulty <garrmcnu@...il.com>
To:     linux-mtd@...ts.infradead.org
Cc:     richard@....at, dedekind1@...il.com, adrian.hunter@...el.com,
        s.hauer@...gutronix.de, linux-kernel@...r.kernel.org,
        Garry McNulty <garrmcnu@...il.com>
Subject: [PATCH] ubifs: fix memory leak on error condition

If the call to ubifs_read_nnode() fails in ubifs_lpt_calc_hash() an
error is returned without freeing the memory allocated to 'buf'.
Jump to 'out' label to free allocated memory and return the error code.

Detected by CoverityScan, CID 1441025 ("Resource leak")

Signed-off-by: Garry McNulty <garrmcnu@...il.com>
---
 fs/ubifs/lpt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index d1d5e96350dd..c162459a1e02 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1688,7 +1688,7 @@ int ubifs_lpt_calc_hash(struct ubifs_info *c, u8 *hash)
 	if (!c->nroot) {
 		err = ubifs_read_nnode(c, NULL, 0);
 		if (err)
-			return err;
+			goto out;
 	}
 
 	cnode = (struct ubifs_cnode *)c->nroot;
-- 
2.14.5