linux-kernel - [PATCH 124/145] iscsi-target: Fix tfc_tpg_nacl_auth

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Message-Id: <1374101277-7915-125-git-send-email-kamal@canonical.com>
Date:	Wed, 17 Jul 2013 15:47:36 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Joern Engel <joern@...fs.org>,
	Nicholas Bellinger <nab@...ux-iscsi.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 124/145] iscsi-target: Fix tfc_tpg_nacl_auth_cit configfs length overflow

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

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

From: =?UTF-8?q?J=C3=B6rn=20Engel?= <joern@...fs.org>

commit 0fbfc46fb0b2f543a8b539e94c6c293ebc0b05a6 upstream.

This patch fixes a potential buffer overflow while processing
iscsi_node_auth input for configfs attributes within NodeACL
tfc_tpg_nacl_auth_cit context.

Signed-off-by: Joern Engel <joern@...fs.org>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/target/iscsi/iscsi_target_configfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 78d75c8..56064a0 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -393,7 +393,7 @@ static ssize_t __iscsi_##prefix##_store_##name(				\
 	if (!capable(CAP_SYS_ADMIN))					\
 		return -EPERM;						\
 									\
-	snprintf(auth->name, PAGE_SIZE, "%s", page);			\
+	snprintf(auth->name, sizeof(auth->name), "%s", page);		\
 	if (!strncmp("NULL", auth->name, 4))				\
 		auth->naf_flags &= ~flags;				\
 	else								\
-- 
1.8.1.2

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