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[2/7] Staging: batman-adv: Don't dereference unchecked incoming soft_iface

Message ID 1287482355-16319-3-git-send-email-sven.eckelmann@gmx.de (mailing list archive)
State Not Applicable, archived
Headers

Commit Message

Sven Eckelmann Oct. 19, 2010, 9:59 a.m. UTC 
  send_packet derefenced forw_packet->if_incoming and checked if
forw_packet->if_incoming is NULL.

This cannot happen, but still makes irritates when reading through the
functions.

Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
---
 drivers/staging/batman-adv/send.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/staging/batman-adv/send.c b/drivers/staging/batman-adv/send.c
index 5d57ef5..9032861 100644
--- a/drivers/staging/batman-adv/send.c
+++ b/drivers/staging/batman-adv/send.c
@@ -160,8 +160,8 @@  static void send_packet_to_if(struct forw_packet *forw_packet,
 static void send_packet(struct forw_packet *forw_packet)
 {
 	struct batman_if *batman_if;
-	struct net_device *soft_iface = forw_packet->if_incoming->soft_iface;
-	struct bat_priv *bat_priv = netdev_priv(soft_iface);
+	struct net_device *soft_iface;
+	struct bat_priv *bat_priv;
 	struct batman_packet *batman_packet =
 		(struct batman_packet *)(forw_packet->skb->data);
 	unsigned char directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
@@ -172,6 +172,9 @@  static void send_packet(struct forw_packet *forw_packet)
 		return;
 	}
 
+	soft_iface = forw_packet->if_incoming->soft_iface;
+	bat_priv = netdev_priv(soft_iface);
+
 	if (forw_packet->if_incoming->if_status != IF_ACTIVE)
 		return;