inet: Avoid potential NULL peer dereference.
We handle NULL in rt{,6}_set_peer but then our caller will try to pass
that NULL pointer into inet_putpeer() which isn't ready for it.
Fix this by moving the NULL check one level up, and then remove the
now unnecessary NULL check from inetpeer_ptr_set_peer().
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 4c33ce3..842510d 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1333,11 +1333,12 @@
return;
peer = inet_getpeer_v4(base, daddr, create);
-
- if (!rt_set_peer(rt, peer))
- inet_putpeer(peer);
- else
- rt->rt_peer_genid = rt_peer_genid();
+ if (peer) {
+ if (!rt_set_peer(rt, peer))
+ inet_putpeer(peer);
+ else
+ rt->rt_peer_genid = rt_peer_genid();
+ }
}
/*