This is a note to let you know that I've just added the patch titled
tipc: check skb_linearize() return value in tipc_disc_rcv()
to the 5.4-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-check-skb_linearize-return-value-in-tipc_disc_r.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a2458f3bd6ee2218d414122639e27fddbca3537c
Author: YueHaibing <yuehaibing@xxxxxxxxxx>
Date: Sat Nov 19 15:28:32 2022 +0800
tipc: check skb_linearize() return value in tipc_disc_rcv()
[ Upstream commit cd0f6421162201e4b22ce757a1966729323185eb ]
If skb_linearize() fails in tipc_disc_rcv(), we need to free the skb instead of
handle it.
Fixes: 25b0b9c4e835 ("tipc: handle collisions of 32-bit node address hash values")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
Acked-by: Jon Maloy <jmaloy@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221119072832.7896-1-yuehaibing@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index 0006c9f87199..0436c8f2967d 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -208,7 +208,10 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *skb,
u32 self;
int err;
- skb_linearize(skb);
+ if (skb_linearize(skb)) {
+ kfree_skb(skb);
+ return;
+ }
hdr = buf_msg(skb);
if (caps & TIPC_NODE_ID128)
