From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9ED3429BD87; Mon, 13 Apr 2026 16:36:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098171; cv=none; b=mKYyBLPgzbou9ydR9XoYcF41+ggOsQqBYWuFHNKPj5UvyMh0bv0mKFXS4022I+di8hyUHEDXbyTrGISbg+GCc8jMxQ0EdvBLeL1bO/Sm2m1gUX4+H7qKl+CX6D/roAWxIP+0maneTC/4tl+TGm6IWM52PVC0sDBS1HkSnlR+kTA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776098171; c=relaxed/simple; bh=Y6ki1dJQngW1XxF931pJHCOCCHBJ1ZGpvzEd4w43pvc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RRCsFhJJ6FLmz/obcHFQV1uShyF9a+pmB41dKzFm6nVJo0IkyQbdoDCWCN0q5TlBSNfIuVCOIxWiKC1SovONrwWu0ABmM6fNTYJIIaIBqKb1Ka14NqLqdfbh0zgAe8M2j9EiycUMCalLi+wZklmZgUZFDami1mOLuhbBK9BW1DM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fx21Uqec; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="fx21Uqec" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2F54BC2BCB8; Mon, 13 Apr 2026 16:36:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776098171; bh=Y6ki1dJQngW1XxF931pJHCOCCHBJ1ZGpvzEd4w43pvc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fx21UqecV1xn0hGV8GLvyI5U5IouQ3GHRzCiof6RzMddU6UP+5Ma5Pm3l3UPEMRLQ L+j0JMs2zQtKxBZ7Lba9JQqaklGnLM0qvJBp1gKStg9gnEF6UMEcMa/uoQPCB3vp9K 6AOCFSfR8ZVDNAecUt5C/9nUVjTDE4wD3hUMeIVE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Westphal , Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 5.15 421/570] netfilter: x_tables: ensure names are nul-terminated Date: Mon, 13 Apr 2026 17:59:12 +0200 Message-ID: <20260413155846.242917413@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Florian Westphal [ Upstream commit a958a4f90ddd7de0800b33ca9d7b886b7d40f74e ] Reject names that lack a \0 character before feeding them to functions that expect c-strings. Fixes tag is the most recent commit that needs this change. Fixes: c38c4597e4bf ("netfilter: implement xt_cgroup cgroup2 path match") Signed-off-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/xt_cgroup.c | 6 ++++++ net/netfilter/xt_rateest.c | 5 +++++ 2 files changed, 11 insertions(+) diff --git a/net/netfilter/xt_cgroup.c b/net/netfilter/xt_cgroup.c index c0f5e9a4f3c65..bfc98719684e2 100644 --- a/net/netfilter/xt_cgroup.c +++ b/net/netfilter/xt_cgroup.c @@ -53,6 +53,9 @@ static int cgroup_mt_check_v1(const struct xt_mtchk_param *par) info->priv = NULL; if (info->has_path) { + if (strnlen(info->path, sizeof(info->path)) >= sizeof(info->path)) + return -ENAMETOOLONG; + cgrp = cgroup_get_from_path(info->path); if (IS_ERR(cgrp)) { pr_info_ratelimited("invalid path, errno=%ld\n", @@ -85,6 +88,9 @@ static int cgroup_mt_check_v2(const struct xt_mtchk_param *par) info->priv = NULL; if (info->has_path) { + if (strnlen(info->path, sizeof(info->path)) >= sizeof(info->path)) + return -ENAMETOOLONG; + cgrp = cgroup_get_from_path(info->path); if (IS_ERR(cgrp)) { pr_info_ratelimited("invalid path, errno=%ld\n", diff --git a/net/netfilter/xt_rateest.c b/net/netfilter/xt_rateest.c index 72324bd976af8..b1d736c15fcbe 100644 --- a/net/netfilter/xt_rateest.c +++ b/net/netfilter/xt_rateest.c @@ -91,6 +91,11 @@ static int xt_rateest_mt_checkentry(const struct xt_mtchk_param *par) goto err1; } + if (strnlen(info->name1, sizeof(info->name1)) >= sizeof(info->name1)) + return -ENAMETOOLONG; + if (strnlen(info->name2, sizeof(info->name2)) >= sizeof(info->name2)) + return -ENAMETOOLONG; + ret = -ENOENT; est1 = xt_rateest_lookup(par->net, info->name1); if (!est1) -- 2.53.0