netdev - [iproute PATCH v3 5/5] tipc/bearer: Prevent NULL pointer dereference

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Message-Id: <20170821100308.24854-6-phil@nwl.cc>
Date:   Mon, 21 Aug 2017 12:03:08 +0200
From:   Phil Sutter <phil@....cc>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     netdev@...r.kernel.org
Subject: [iproute PATCH v3 5/5] tipc/bearer: Prevent NULL pointer dereference

Signed-off-by: Phil Sutter <phil@....cc>
---
Changes since v2:
- Keep assignment and check in separate statements.
---
 tipc/bearer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tipc/bearer.c b/tipc/bearer.c
index c3d4491f8f6ef..0d84570150624 100644
--- a/tipc/bearer.c
+++ b/tipc/bearer.c
@@ -439,7 +439,7 @@ static int cmd_bearer_enable(struct nlmsghdr *nlh, const struct cmd *cmd,
 		return err;
 
 	opt = get_opt(opts, "media");
-	if (strcmp(opt->val, "udp") == 0) {
+	if (opt && strcmp(opt->val, "udp") == 0) {
 		err = nl_add_udp_enable_opts(nlh, opts, cmdl);
 		if (err)
 			return err;
-- 
2.13.1