Commit 743117a9 authored by YueHaibing's avatar YueHaibing Committed by Paolo Abeni
Browse files

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: 5cbb28a4 ("tipc: linearize arriving NAME_DISTR and LINK_PROTO buffers")
Signed-off-by: default avatarYueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20221203094635.29024-1-yuehaibing@huawei.com


Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 433c07a1

net/tipc/link.c

+3 −1
Original line number Diff line number Diff line
@@ -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);