netdev - [iproute PATCH 45/51] tipc/bearer: Prevent NULL pointer dereference

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Date:   Sat, 12 Aug 2017 14:05:04 +0200
From:   Phil Sutter <phil@....cc>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org
Subject: [iproute PATCH 45/51] tipc/bearer: Prevent NULL pointer dereference

Signed-off-by: Phil Sutter <phil@....cc>
---
 tipc/bearer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tipc/bearer.c b/tipc/bearer.c
index c3d4491f8f6ef..0598328ab1f1b 100644
--- a/tipc/bearer.c
+++ b/tipc/bearer.c
@@ -438,8 +438,8 @@ static int cmd_bearer_enable(struct nlmsghdr *nlh, const struct cmd *cmd,
 	if (err)
 		return err;
 
-	opt = get_opt(opts, "media");
-	if (strcmp(opt->val, "udp") == 0) {
+	if ((opt = get_opt(opts, "media")) &&
+	    strcmp(opt->val, "udp") == 0) {
 		err = nl_add_udp_enable_opts(nlh, opts, cmdl);
 		if (err)
 			return err;
-- 
2.13.1