From: David S. Miller <davem@sunset.davemloft.net>
Date: Fri, 27 Oct 2006 22:26:21 +0000 (-0700)
Subject: [APPLETALK]: Fix potential OOPS in atalk_sendmsg().
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=201a95afaa324b23188eeec268f6bb0b4b70b710;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[APPLETALK]: Fix potential OOPS in atalk_sendmsg().

atrtr_find() can return NULL, so do not blindly dereference
rt->dev before we check for rt being NULL.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 708e2e0371af..485e35c3b28b 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1584,7 +1584,6 @@ static int atalk_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr
 
 	if (usat->sat_addr.s_net || usat->sat_addr.s_node == ATADDR_ANYNODE) {
 		rt = atrtr_find(&usat->sat_addr);
-		dev = rt->dev;
 	} else {
 		struct atalk_addr at_hint;
 
@@ -1592,7 +1591,6 @@ static int atalk_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr
 		at_hint.s_net  = at->src_net;
 
 		rt = atrtr_find(&at_hint);
-		dev = rt->dev;
 	}
 	if (!rt)
 		return -ENETUNREACH;