From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E217352C52 for ; Mon, 11 May 2026 06:02:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778479333; cv=none; b=UXQTQw/De5xhINM1X5HMvwLbgi4j48x7FasnrPBmSMp614lB3Qul7wjvdDKMy7MbmOKwxuYx9hRM2StUqDqScNsbTA7tMee+Y44jk+wUFUgXmbbDQ/iFGtwBQTbkK7w9Wm5gCkQDNAgwCRRzMkS8HYfACPFrQIQpVky7hVzuGiA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778479333; c=relaxed/simple; bh=ZcuqRPQ78FNR2pVqAoiBnXJPFJEaRr1Gp8wk6ku7kmw=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=I50OThYwJP3s8EfrJ3ZBLVX2nyNwu8JxXmLCONJtU1bgEcEhA/88M4V4pPJP+Md2XAR/OCmE/kMW0Xe0u4dkvbbEy7bgSkx4uNcmv0H4RSbeduuad3Gea9b+kZg4/piGKTjEOY2j6I2arWhtlC/Ho0XZCrBLxXmAJ+ztzOotDE8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oyK5Rc63; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="oyK5Rc63" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44EF7C2BCB0; Mon, 11 May 2026 06:02:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778479332; bh=ZcuqRPQ78FNR2pVqAoiBnXJPFJEaRr1Gp8wk6ku7kmw=; h=Subject:To:Cc:From:Date:From; b=oyK5Rc63JJk2MxgReT2CcV5RcJkPECa+GTiudLtkAnyy6dbstCVD7zSmunatUh3dJ PPM+LThyOb1j+hdgv+4NBvA68YjKCXiisYrsaQemSk36YASEQseUjNYR85hwISq5ft Fa9yOd+31T90jDG5QLRuo3vtwgfONzaevSH0GESw= Subject: FAILED: patch "[PATCH] rxrpc: Also unshare DATA/RESPONSE packets when paged frags" failed to apply to 6.12-stable tree To: imv4bel@gmail.com,dhowells@redhat.com,jiayuan.chen@linux.dev,torvalds@linux-foundation.org Cc: From: Date: Mon, 11 May 2026 08:02:09 +0200 Message-ID: <2026051109-ocelot-dwindle-a7e9@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.12-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 . 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-6.12.y git checkout FETCH_HEAD git cherry-pick -x aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 # git commit -s git send-email --to '' --in-reply-to '2026051109-ocelot-dwindle-a7e9@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 Mon Sep 17 00:00:00 2001 From: Hyunwoo Kim Date: Fri, 8 May 2026 17:53:09 +0900 Subject: [PATCH] rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries externally-owned paged fragments (e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via __ip_append_data, or a chained skb_has_frag_list()) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate to also unshare when skb_has_frag_list() or skb_has_shared_frag() is true. This catches the splice-loopback vector and other externally-shared frag sources while preserving the zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC page_pool RX, GRO). The OOM/trace handling already in place is reused. Fixes: d0d5c0cd1e71 ("rxrpc: Use skb_unshare() rather than skb_cow_data()") Cc: stable@vger.kernel.org Signed-off-by: Hyunwoo Kim Reviewed-by: Jiayuan Chen Acked-by: David Howells Signed-off-by: Linus Torvalds diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index fdd683261226..2b19b252225e 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -334,7 +334,9 @@ bool rxrpc_input_call_event(struct rxrpc_call *call) if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA && sp->hdr.securityIndex != 0 && - skb_cloned(skb)) { + (skb_cloned(skb) || + skb_has_frag_list(skb) || + skb_has_shared_frag(skb))) { /* Unshare the packet so that it can be * modified by in-place decryption. */ diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c index a2130d25aaa9..442414d90ba1 100644 --- a/net/rxrpc/conn_event.c +++ b/net/rxrpc/conn_event.c @@ -245,7 +245,8 @@ static int rxrpc_verify_response(struct rxrpc_connection *conn, { int ret; - if (skb_cloned(skb)) { + if (skb_cloned(skb) || skb_has_frag_list(skb) || + skb_has_shared_frag(skb)) { /* Copy the packet if shared so that we can do in-place * decryption. */