From 743117a997bbd4840e827295c07e59bcd7f7caa3 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Sat, 3 Dec 2022 17:46:35 +0800
Subject: [PATCH] tipc: Fix potential OOB in tipc_link_proto_rcv()
Fix the potential risk of OOB if skb_linearize() fails in
tipc_link_proto_rcv().
Fixes: 5cbb28a4bf65 ("tipc: linearize arriving NAME_DISTR and LINK_PROTO buffers")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20221203094635.29024-1-yuehaibing@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
net/tipc/link.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/tipc/link.c b/net/tipc/link.c
index e260c0d557f5c..b3ce24823f503 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2224,7 +2224,9 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
if (tipc_own_addr(l->net) > msg_prevnode(hdr))
l->net_plane = msg_net_plane(hdr);
- skb_linearize(skb);
+ if (skb_linearize(skb))
+ goto exit;
+
hdr = buf_msg(skb);
data = msg_data(hdr);