Patch "mptcp: avoid unneeded address copy" has been added to the 6.3-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    mptcp: avoid unneeded address copy

to the 6.3-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:
     mptcp-avoid-unneeded-address-copy.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 01a12e84cebe293fbb69eec239cd86eb23743b94
Author: Paolo Abeni <pabeni@xxxxxxxxxx>
Date:   Mon Mar 27 12:22:21 2023 +0200

    mptcp: avoid unneeded address copy
    
    [ Upstream commit 2bb9a37f0e194ed95c70603b0efc7898a5a0d9b4 ]
    
    In the syn_recv fallback path, the msk is unused. We can skip
    setting the socket address.
    
    Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
    Reviewed-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
    Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Stable-dep-of: 7e8b88ec35ee ("mptcp: consolidate passive msk socket initialization")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 281c1cc8dc8dc..8a6bd2782dc97 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -823,8 +823,6 @@ static struct sock *subflow_syn_recv_sock(const struct sock *sk,
 				goto dispose_child;
 			}
 
-			if (new_msk)
-				mptcp_copy_inaddrs(new_msk, child);
 			mptcp_subflow_drop_ctx(child);
 			goto out;
 		}