This is a note to let you know that I've just added the patch titled tipc: Fix potential OOB in tipc_link_proto_rcv() to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tipc-fix-potential-oob-in-tipc_link_proto_rcv.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 806658e7b8b868bf1ffa5959ea2f818a6424a1b5 Author: YueHaibing <yuehaibing@xxxxxxxxxx> Date: Sat Dec 3 17:46:35 2022 +0800 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: 5cbb28a4bf65 ("tipc: linearize arriving NAME_DISTR and LINK_PROTO buffers") Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> Link: https://lore.kernel.org/r/20221203094635.29024-1-yuehaibing@xxxxxxxxxx Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/net/tipc/link.c b/net/tipc/link.c index 115a4a7950f5..8fdd3b23bd12 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -2223,7 +2223,9 @@ 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);