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 91D513D9535; Thu, 16 Jul 2026 14:07:08 +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=1784210829; cv=none; b=p7gwj6P7fOWZgx9ukcf/Uo4uGpodIP5M/cx84FaTsAkIzju3bNfkj4y7WkbZ8wmWMhvkzAyM+IkPKu1ZjqXdUAo2T0rtTQUf5ADYVg3qj00R3WZvtAqMEB2rYz5Sg8LbDjS0BcY9kuBt3FjOh21QWYhZyUYSbkoKNdSO3qv8v9A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784210829; c=relaxed/simple; bh=NUtNbJLDiWWM9p/2vLStGyhCn8gM362jkYvub0cUGdk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=N7M1JMj+RVKuUddebb5dWym/SBRm1C0sbXONjsBjHnuJlG5jwmrxYWWnWqHkXkjLeJePl8CxmUM1UmUGuqMy5oE3TlzMKp8KiY9ASjvx1KUqws2tyBwAn14BekgQM+aUzSCQVCYSW9ornlJsPMbGBSWCPyXabJPL7wBhosl+6WQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zVrssOaN; 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="zVrssOaN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 045631F000E9; Thu, 16 Jul 2026 14:07:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784210828; bh=D2J1NyN5s8ffblmWwYxUT+JiSHgEbau2ngbT5gVW3kw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=zVrssOaNJKiztarjhF1fUYQ756aIq7YJ8UGyt6kBvoImPQ+hXq8TIjptcSDG9yHAd Yf0nvoCs1gM+Gq+hj/3CN/OpTeaf1ZG2Ks+wdfefcfyQKQa1pVJ1U04jhd9U07Cs2c ZobFoTOVdoGTWuu+SmG7qaaMCWJC8UvnCSwF9jEU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Westphal Subject: [PATCH 6.18 197/480] netfilter: ebtables: module names must be null-terminated Date: Thu, 16 Jul 2026 15:29:04 +0200 Message-ID: <20260716133048.989474668@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260716133044.672218725@linuxfoundation.org> References: <20260716133044.672218725@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 6.18-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 @@ -403,6 +403,9 @@ 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))