This is a note to let you know that I've just added the patch titled
net: qrtr: Update packets cloning when broadcasting
to the 4.19-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:
net-qrtr-update-packets-cloning-when-broadcasting.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 001a4b0b071c3b92241465abedf6084f6d2b361d
Author: Youssef Samir <quic_yabdulra@xxxxxxxxxxx>
Date: Mon Sep 16 19:08:58 2024 +0200
net: qrtr: Update packets cloning when broadcasting
[ Upstream commit f011b313e8ebd5b7abd8521b5119aecef403de45 ]
When broadcasting data to multiple nodes via MHI, using skb_clone()
causes all nodes to receive the same header data. This can result in
packets being discarded by endpoints, leading to lost data.
This issue occurs when a socket is closed, and a QRTR_TYPE_DEL_CLIENT
packet is broadcasted. All nodes receive the same destination node ID,
causing the node connected to the client to discard the packet and
remain unaware of the client's deletion.
Replace skb_clone() with pskb_copy(), to create a separate copy of
the header for each sk_buff.
Fixes: bdabad3e363d ("net: Add Qualcomm IPC router")
Signed-off-by: Youssef Samir <quic_yabdulra@xxxxxxxxxxx>
Reviewed-by: Jeffery Hugo <quic_jhugo@xxxxxxxxxxx>
Reviewed-by: Carl Vanderlip <quic_carlv@xxxxxxxxxxx>
Reviewed-by: Chris Lew <quic_clew@xxxxxxxxxxx>
Link: https://patch.msgid.link/20240916170858.2382247-1-quic_yabdulra@xxxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/qrtr/qrtr.c b/net/qrtr/qrtr.c
index 128d0a48478d1..890a8fe51a9af 100644
--- a/net/qrtr/qrtr.c
+++ b/net/qrtr/qrtr.c
@@ -718,7 +718,7 @@ static int qrtr_bcast_enqueue(struct qrtr_node *node, struct sk_buff *skb,
mutex_lock(&qrtr_node_lock);
list_for_each_entry(node, &qrtr_all_nodes, item) {
- skbn = skb_clone(skb, GFP_KERNEL);
+ skbn = pskb_copy(skb, GFP_KERNEL);
if (!skbn)
break;
skb_set_owner_w(skbn, skb->sk);
