From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E019B416CFD for ; Mon, 20 Jul 2026 12:35:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784550958; cv=none; b=PgL9Zl1FtyIq0SuMBNDv1h2A1NnJqcJOQ5QocdmdDO2LWUB+crD/IVzDRUCAo0338tsPReV895xAcK0hpyv84VHkUBZ2J9Kttov2y4wu9Mfu6hKffK/ILpvzOY2QqXCJKEVwZgnNZSjOvcbS9a0h6G3srWNO42O5EHV+eMNL8Ys= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784550958; c=relaxed/simple; bh=+5PUwnZaIz/GFN0SoktzxGIub5fD0HJK5kCec+RAySE=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=nAc0RmwUAJr0A47rivZswKjrouvwW1sqSZDx9YZz4sUW2us8YxlT97fU52pCzJ8ptdWM2H12K8qG5IfPMLJh3oJBr5zubKvDWJvIsLm2cCE/DBy+nfurP9GJPEgzWZVDy1aYjealqvs0x2DHgjL3BlC1iMW3ecOVFXzOUX5lSDE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yZN/hYuA; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="yZN/hYuA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 455931F000E9; Mon, 20 Jul 2026 12:35:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784550956; bh=MXFHJYDHibBacdDhhfxGih8ABtLTMpxUQYj4Q48ah5c=; h=Subject:To:Cc:From:Date; b=yZN/hYuAZT4Ms+X1TxYLC44myMbx0NFbrNz6b8OOQv0De+HyT4k24GzZ6J/juxQbl s43QYi3MNPaHh9C3iHExhiwI6d6ZaPdDT1D6esR0fsgGIQsX1E1fPGui/TD/1UmB/e 7hHvJZ99AVJpIdguXt2i56Yz6/cUmkP7dShIywUk= Subject: FAILED: patch "[PATCH] netfilter: nf_conntrack_sip: validate skb_dst() before" failed to apply to 6.12-stable tree To: pablo@netfilter.org,fw@strlen.de,n05ec@lzu.edu.cn Cc: From: Date: Mon, 20 Jul 2026 14:34:02 +0200 Message-ID: <2026072002-habitat-confirm-9500@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 e5e24a365a5e024efef63cc49abb345fbd4852c5 # git commit -s git send-email --to '' --in-reply-to '2026072002-habitat-confirm-9500@gregkh' --subject-prefix 'PATCH 6.12.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e5e24a365a5e024efef63cc49abb345fbd4852c5 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Fri, 26 Jun 2026 13:24:49 +0200 Subject: [PATCH] netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter). This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash. Fixes: cae3a2627520 ("openvswitch: Allow attaching helpers to ct action") Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct") Cc: stable@vger.kernel.org Reported-by: Ren Wei Signed-off-by: Pablo Neira Ayuso Signed-off-by: Florian Westphal diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c index 5ec3a4a4bbd7..f3f90a866338 100644 --- a/net/netfilter/nf_conntrack_sip.c +++ b/net/netfilter/nf_conntrack_sip.c @@ -956,7 +956,6 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff, return NF_ACCEPT; saddr = &ct->tuplehash[!dir].tuple.src.u3; } else if (sip_external_media) { - struct net_device *dev = skb_dst(skb)->dev; struct dst_entry *dst = NULL; struct flowi fl; @@ -978,7 +977,11 @@ static int set_expected_rtp_rtcp(struct sk_buff *skb, unsigned int protoff, * through the same interface as the signalling peer. */ if (dst) { - bool external_media = (dst->dev == dev); + const struct dst_entry *this_dst = skb_dst(skb); + bool external_media = false; + + if (this_dst && dst->dev == this_dst->dev) + external_media = true; dst_release(dst); if (external_media)