netdev - [PATCH] isdn: hisax: l3dss1.c: Fix for possible 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-next>] [day] [month] [year] [list]

Message-Id: <1400347101-25476-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Sat, 17 May 2014 19:18:21 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Karsten Keil <isdn@...ux-pingi.de>,
	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] isdn: hisax: l3dss1.c:  Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/isdn/hisax/l3dss1.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/isdn/hisax/l3dss1.c b/drivers/isdn/hisax/l3dss1.c
index cda7006..3ea6257 100644
--- a/drivers/isdn/hisax/l3dss1.c
+++ b/drivers/isdn/hisax/l3dss1.c
@@ -2208,8 +2208,12 @@ static int l3dss1_cmd_global(struct PStack *st, isdn_ctrl *ic)
 				{ free_invoke_id(st, id);
 					return (-2);
 				}
-			pc->prot.dss1.ll_id = ic->parm.dss1_io.ll_id; /* remember id */
-			pc->prot.dss1.proc = ic->parm.dss1_io.proc; /* and procedure */
+
+			if (pc)
+			{
+				pc->prot.dss1.ll_id = ic->parm.dss1_io.ll_id; /* remember id */
+				pc->prot.dss1.proc = ic->parm.dss1_io.proc; /* and procedure */
+			}
 
 			if (!(skb = l3_alloc_skb(l)))
 			{ free_invoke_id(st, id);
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html