linux-kernel - [ 73/74] md: bcache: io.c: fix a potential NULL pointer dereference

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

Message-Id: <20130827010439.389338008@linuxfoundation.org>
Date:	Mon, 26 Aug 2013 18:09:11 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Kumar Amit Mehta <gmate.amit@...il.com>,
	Kent Overstreet <koverstreet@...gle.com>
Subject: [ 73/74] md: bcache: io.c: fix a potential NULL pointer dereference

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kumar Amit Mehta <gmate.amit@...il.com>

commit 5c694129c8db6d89c9be109049a16510b2f70f6d upstream.

bio_alloc_bioset returns NULL on failure. This fix adds a missing check
for potential NULL pointer dereferencing.

Signed-off-by: Kumar Amit Mehta <gmate.amit@...il.com>
Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/md/bcache/io.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -97,6 +97,8 @@ struct bio *bch_bio_split(struct bio *bi
 
 	if (bio->bi_rw & REQ_DISCARD) {
 		ret = bio_alloc_bioset(gfp, 1, bs);
+		if (!ret)
+			return NULL;
 		idx = 0;
 		goto out;
 	}


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/