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tipc: Fix potential OOB in tipc_link_proto_rcv()

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[ Upstream commit 743117a997 ]

Fix the potential risk of OOB if skb_linearize() fails in
tipc_link_proto_rcv().

Fixes: 5cbb28a4bf ("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>
This commit is contained in:
YueHaibing 2022-12-03 17:46:35 +08:00 committed by Greg Kroah-Hartman
parent 93aaa4bb72
commit 36e248269a
1 changed files with 3 additions and 1 deletions
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4
net/tipc/link.c
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@ -2188,7 +2188,9 @@ static int tipc_link_proto_rcv(struct tipc_link *l, struct sk_buff *skb,
if (tipc_own_addr(l->net) > msg_prevnode(hdr)) if (tipc_own_addr(l->net) > msg_prevnode(hdr))
l->net_plane = msg_net_plane(hdr); l->net_plane = msg_net_plane(hdr);
skb_linearize(skb); if (skb_linearize(skb))
goto exit;
hdr = buf_msg(skb); hdr = buf_msg(skb);
data = msg_data(hdr); data = msg_data(hdr);