FAILED: patch "[PATCH] rxrpc: Fix rxrpc_input_call_event() to only unshare DATA" failed to apply to 6.6-stable tree

FAILED: patch "[PATCH] rxrpc: Fix rxrpc_input_call_event() to only unshare DATA" failed to apply to 6.6-stable tree

[gregkh]

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 55b2984c96c37f909bbfe8851f13152693951382
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026050111-freemason-speed-b71c@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 55b2984c96c37f909bbfe8851f13152693951382 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 23 Apr 2026 21:09:06 +0100
Subject: [PATCH] rxrpc: Fix rxrpc_input_call_event() to only unshare DATA
 packets

Fix rxrpc_input_call_event() to only unshare DATA packets and not ACK,
ABORT, etc..

And with that, rxrpc_input_packet() doesn't need to take a pointer to the
pointer to the packet, so change that to just a pointer.

Fixes: 1f2740150f90 ("rxrpc: Fix potential UAF after skb_unshare() failure")
Closes: https://sashiko.dev/#/patchset/20260422161438.2593376-4-dhowells@redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Jeffrey Altman <jaltman@auristor.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: stable@kernel.org
Link: https://patch.msgid.link/20260423200909.3049438-2-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c
index cc8f9dfa44e8..fdd683261226 100644
--- a/net/rxrpc/call_event.c
+++ b/net/rxrpc/call_event.c
@@ -332,7 +332,8 @@ bool rxrpc_input_call_event(struct rxrpc_call *call)
 
 			saw_ack |= sp->hdr.type == RXRPC_PACKET_TYPE_ACK;
 
-			if (sp->hdr.securityIndex != 0 &&
+			if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA &&
+			    sp->hdr.securityIndex != 0 &&
 			    skb_cloned(skb)) {
 				/* Unshare the packet so that it can be
 				 * modified by in-place decryption.