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 0FCF5383326 for ; Mon, 20 Jul 2026 15:56:21 +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=1784562982; cv=none; b=EB6nr00X4rEm0c046TBgrffTFmDY9/+Fry4nh5itGCDPJvqFm8VuYRUMlf2QYSmcYCCSaEMWLtkbi4glk7xnqWnbKfGkOgmnPw4GzzsjTtPdENl6jEupoOHbA9aUMAFp9xyE2uRxjb4rvozsCt9dUwG2JKZxCw02g+STu0R7l68= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784562982; c=relaxed/simple; bh=EKcfvYc13UfJp6f/LfCJnFXU8EX3YwJcXwHYwF+kEno=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=PXN3wegDNmBglO0KSNb0CLGAve/BgPvJ83oPNkH43k6xeXh+TwtJDi8F5Xt6heV1YbOnu3QtmWMhkF5H0hQ01rYDM6W2Dvq08nUXYiBvoTxwYpc0h2gL25/usrYNhEsNCcDranfXnPUbPTFKLXbwY0ZXRQ7a1/4AJA2Uj+x2Xik= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hpOgwDSd; 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="hpOgwDSd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 755E81F000E9; Mon, 20 Jul 2026 15:56:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784562981; bh=LqXIOc6cizjb5PfxV0kiKhSIdN1GxSkxwrqq6KByo8s=; h=Subject:To:Cc:From:Date; b=hpOgwDSdzmk+q4l+aJpoit5D9csdvWbBBv0UhCfoUNt7bDFtSzVvJMY7Pk8iWCtZz j1YjXngx9SrhrSIBvPodnADbQ+JBVnNdPlg/q03qlIFGfG/53buCw3iC61YAO+SLUr PqXJxI5VYHNI0+awu1hctcbuo/1ChKcclgDM2FlM= Subject: FAILED: patch "[PATCH] net: ipip: require CAP_NET_ADMIN in the device netns for" failed to apply to 5.15-stable tree To: maoyixie.tju@gmail.com,kuba@kernel.org,kuniyu@google.com,shaw.leon@gmail.com Cc: From: Date: Mon, 20 Jul 2026 17:53:05 +0200 Message-ID: <2026072005-sabotage-stylized-6dae@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 5.15-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-5.15.y git checkout FETCH_HEAD git cherry-pick -x 8211a26324667980a463c069469a818e71207e02 # git commit -s git send-email --to '' --in-reply-to '2026072005-sabotage-stylized-6dae@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 8211a26324667980a463c069469a818e71207e02 Mon Sep 17 00:00:00 2001 From: Maoyi Xie Date: Fri, 12 Jun 2026 16:59:36 +0800 Subject: [PATCH] net: ipip: require CAP_NET_ADMIN in the device netns for changelink ipip_changelink() operates on at most two netns, dev_net(dev) and the tunnel link netns t->net. They differ once the device is created in or moved to a netns other than the one the request runs in. The rtnl changelink path checks CAP_NET_ADMIN only against dev_net(dev), so a caller privileged there but not in t->net can rewrite a tunnel that lives in t->net. Gate ipip_changelink() on rtnl_dev_link_net_capable() at its top, before any attribute is parsed. Reported-by: Xiao Liang Closes: https://lore.kernel.org/netdev/CABAhCOSzP1vaThGV35_VnsRCb=87_CPjPVsTHbq905k8A+BuUg@mail.gmail.com/ Fixes: 6c742e714d8c ("ipip: add x-netns support") Cc: stable@vger.kernel.org Signed-off-by: Maoyi Xie Reviewed-by: Kuniyuki Iwashima Link: https://patch.msgid.link/20260612085941.3158249-3-maoyixie.tju@gmail.com Signed-off-by: Jakub Kicinski diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c index 4f89a03e0b49..b643194f57d2 100644 --- a/net/ipv4/ipip.c +++ b/net/ipv4/ipip.c @@ -494,6 +494,9 @@ static int ipip_changelink(struct net_device *dev, struct nlattr *tb[], bool collect_md; __u32 fwmark = t->fwmark; + if (!rtnl_dev_link_net_capable(dev, t->net)) + return -EPERM; + if (ip_tunnel_netlink_encap_parms(data, &ipencap)) { int err = ip_tunnel_encap_setup(t, &ipencap);