From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.secunet.com (mx1.secunet.com [62.96.220.36]) (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 8531C2EF653; Tue, 6 Oct 2026 07:04:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.96.220.36 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791270273; cv=none; b=i0CpzCE//Esdn2HsqnCTperDAyIX8Vh8sRZBuIHBtN368NbP5P2pRDQG5GGQiRC7ksRa3NcMR+2Znnqyta1tQ/kJaRHeymdL4i7WWOvhkPpiG3dJLG4sWFVlsZpX24Pzy+8gC82VEU2DU8kk5DcefQJ7cX3lbUiiPuVq2LjEU7g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791270273; c=relaxed/simple; bh=ODLTFuu6RtyHe7yR3aEYiuR5t2iZDkrpVZqPvaFIbxg=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=tKdUbyRG+lwFP8WZC18p55fAsWv6zbKzEOK+0kcMPOmSWlyTVA9tE3cj/7feYchyr9N5EUYECY9ExgW+qEE0FbvE1M4EXVKiVbzeku74HEp7nEBYBHhTFwPcsNiKYoMp8pAlG+C6dCeMgT4CyWDcKJr/MPGc0+6UjUaL9c/xi5U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=secunet.com; spf=pass smtp.mailfrom=secunet.com; dkim=pass (2048-bit key) header.d=secunet.com header.i=@secunet.com header.b=GFjIuNaa; arc=none smtp.client-ip=62.96.220.36 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=secunet.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=secunet.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=secunet.com header.i=@secunet.com header.b="GFjIuNaa" Received: from localhost (localhost [127.0.0.1]) by mx1.secunet.com (Postfix) with ESMTP id B160D2067F; Tue, 6 Oct 2026 09:04:28 +0200 (CEST) X-Virus-Scanned: by secunet Received: from mx1.secunet.com ([127.0.0.1]) by localhost (mx1.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ey5iQSulGF3K; Tue, 6 Oct 2026 09:04:28 +0200 (CEST) Received: from EXCH-02.secunet.de (rl2.secunet.de [10.32.0.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.secunet.com (Postfix) with ESMTPS id 20EDE20189; Tue, 6 Oct 2026 09:04:28 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.secunet.com 20EDE20189 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=secunet.com; s=202301; t=1791270268; bh=lixG+JL1RSBndTTako0jib0t3jQigyyB59YZ0faywhQ=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=GFjIuNaa8Kob36gkcN3xVXp0lbsILp+6olmZ/r5wFEhnr1Te/7VU3iDBCvNkrtfox xgHni66BUt3xuFC59dIZusuvhXd+MJZHZDEaLZXpPUVZImOvtS9nDC49ehDAyrC47d O4VPwRtsJvS7oAm1jIVOsCH/5ZuI4ra6mQ7+Ssxv89HweBoSIk7nqdd9kUT7zO5vo6 RGIfH1evn/Sn5DVtAztq0NtODQrJT+QDYJyul8XCghnyqAGS+14mypVP+qN4N37A1D krjslWp5ygKf+VVidbkcIEBhCPRU3wO+8hU2/n8VKWtBn4gA/ha1qSjMTkJjoiRiKg yAJG02flyzUQg== Received: from moon.secunet.de (172.18.149.1) by EXCH-02.secunet.de (10.32.0.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Tue, 6 Oct 2026 09:04:26 +0200 From: Antony Antony To: Antony Antony , Steffen Klassert , Herbert Xu , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , David Ahern , Jamal Hadi Salim , Shuah Khan , Paul Chaignon , Louis DeLosSantos , Jonathan Corbet , Shuah Khan , Randy Dunlap CC: Sabrina Dubroca , , Yan Yan , Tobias Brunner , Florian Westphal , , , Subject: [PATCH ipsec v4 1/9] xfrm: state: reject mark with bits outside its mask on add Date: Tue, 6 Oct 2026 09:03:31 +0200 Message-ID: X-Mailer: git-send-email 2.39.5 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.16-dev Content-Transfer-Encoding: 8bit X-ClientProxiedBy: EXCH-04.secunet.de (10.32.0.184) To EXCH-02.secunet.de (10.32.0.172) A mark/mask like 0x101/0xff is silently truncated to 0x01/0xff on insert, so the exact-match lookups added later in this series (DELSA, GETSA, GETAE, NEWAE, EXPIRE, MIGRATE_STATE) could not find the SA. Reject it instead. Fixes: 0b91fda3a1f0 ("xfrm: Sanitize marks before insert") Cc: # needs exact-match SA lookups from this series Signed-off-by: Antony Antony --- v3->v4: added this patch --- net/xfrm/xfrm_state.c | 3 --- net/xfrm/xfrm_user.c | 24 ++++++++++++++++++++++++ 2 files changed, 24 insertions(+), 3 deletions(-) diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c index e45aa1ed5b96..602404ffc4d4 100644 --- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -1732,9 +1732,6 @@ static void __xfrm_state_insert(struct xfrm_state *x) list_add(&x->km.all, &net->xfrm.state_all); - /* Sanitize mark before store */ - x->mark.v &= x->mark.m; - h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family); XFRM_STATE_INSERT(bydst, &x->bydst, diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index a2587c7e796b..0723d791b8b7 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -314,6 +314,22 @@ static int verify_selector_prefixlen(u16 family, } } +static int verify_mark(struct nlattr **attrs, struct netlink_ext_ack *extack) +{ + const struct xfrm_mark *m; + + if (!attrs[XFRMA_MARK]) + return 0; + + m = nla_data(attrs[XFRMA_MARK]); + if ((m->v & m->m) != m->v) { + NL_SET_ERR_MSG(extack, "Invalid mark value/mask combination"); + return -EINVAL; + } + + return 0; +} + static int verify_newsa_info(struct xfrm_usersa_info *p, struct nlattr **attrs, struct netlink_ext_ack *extack) @@ -333,6 +349,10 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, if (err) goto out; + err = verify_mark(attrs, extack); + if (err) + goto out; + err = -EINVAL; switch (p->id.proto) { case IPPROTO_AH: @@ -3370,6 +3390,10 @@ static int xfrm_do_migrate_state(struct sk_buff *skb, struct nlmsghdr *nlh, return err; } + err = verify_mark(attrs, extack); + if (err) + return err; + copy_from_user_migrate_state(&m, um); x = xfrm_state_lookup(net, m.old_mark.v & m.old_mark.m, -- 2.47.3