Commit 36eedb9a authored Dec 03, 2022 by YueHaibing Committed by Greg Kroah-Hartman Dec 14, 2022

tipc: Fix potential OOB in tipc_link_proto_rcv()



[ Upstream commit 743117a997bbd4840e827295c07e59bcd7f7caa3 ]

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: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20221203094635.29024-1-yuehaibing@huawei.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 1b6360a0

net/tipc/link.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1971,7 +1971,9 @@ 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);