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 BF6D73B8120; Tue, 21 Jul 2026 22:34:00 +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=1784673241; cv=none; b=nVBvLFUv5e5neUOlffHP5hkOXhGQGtRmCsFtrs87qy278OtCWsubBUIeoKUZEQRuVbpal565JWwErFQz2jAFuME9IpAJfNiSeu0KliVsd6GFCM9QhXte1YJAhUJGIuXbHKA08uirIqdS6by3xpYrINEYzrAiDKbrnplwda0XL2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784673241; c=relaxed/simple; bh=Wcn9xIDQVIku2wi9qNDK1mGuvvF95LvHHoUrLxDKGf8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WEpEaeA5HaA3CvWjDBALDp6hbtRI2qqmKEw7MWgFXe4ThuLP0KOjt/x+TRYd/6vy9Ej18tbYRQVhwo2I47EPxMlpSsJwV4ewb5myIt/WOAzXw7N6pJdkxIQsCGPba/rpX8reb3nZEQ9uf0NnKLWKNwafws+n5UFULg2eJ5slHoU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=I6MEM1Wy; 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="I6MEM1Wy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD0CB1F000E9; Tue, 21 Jul 2026 22:33:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784673240; bh=P8l2YikIaIcFNcQwhn37wA5LOacyTUH4IPLR5/ZK2Ls=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=I6MEM1WyXzl+FHQeRJ+Rp8t7eThC4aDoDm9wOw9ORVvF3c6f2c9vg10SQyNeR4Rhg zn44RjUF0pKQSNYYTmM2SbWOIgm3SCzo87ddXbmbBZkJaJhnOp6II5wSybUXwVvFFx KwsNSe8QVHqzC8GwmHpGW+5hiF+MuU0/Al805pCU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Westphal Subject: [PATCH 5.10 081/699] netfilter: ebtables: module names must be null-terminated Date: Tue, 21 Jul 2026 17:17:20 +0200 Message-ID: <20260721152357.532933193@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152355.667394603@linuxfoundation.org> References: <20260721152355.667394603@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Florian Westphal commit 084d23f818321390509e9738a0b08bbf46df6425 upstream. We need to explicitly check the length, else we may pass non-null terminated string to request_module(). Cc: stable@vger.kernel.org Fixes: bcf493428840 ("netfilter: ebtables: Fix extension lookup with identical name") Signed-off-by: Florian Westphal Signed-off-by: Greg Kroah-Hartman --- net/bridge/netfilter/ebtables.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -363,6 +363,9 @@ ebt_check_match(struct ebt_entry_match * left - sizeof(struct ebt_entry_match) < m->match_size) return -EINVAL; + if (strnlen(m->u.name, XT_EXTENSION_MAXNAMELEN) == XT_EXTENSION_MAXNAMELEN) + return -EINVAL; + match = xt_find_match(NFPROTO_BRIDGE, m->u.name, m->u.revision); if (IS_ERR(match) || match->family != NFPROTO_BRIDGE) { if (!IS_ERR(match))