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 7E13A28725B; Thu, 16 Jul 2026 13:44:36 +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=1784209477; cv=none; b=RX+GlSFhaZQnd3QXAjb3ka0DnySb873eXPtk4QlkO5rmbrhPD9ZcboR6oFVlX5CvWtgjNiT4SmJqL52TlFfOAgvHFFUi7veYdNWWcGXdvH3ZjAtVJbL3wA/p5WurXh/dgx0hNn9/fbvWAK6S0jxmMaWK42uXjc+ErX+hFkoo2WI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784209477; c=relaxed/simple; bh=VT3PPPpFXE1udk05OYiKo1XYsqBjDNSCDhBwiCHJWJY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dfoSq27UGJfVF/ijo1FraiL/+glD60R0W3wZizLdXPojVjm+PDD150O+WDb5kDxGJRlCkJku33LynLys2Xyf5DpgyzjYxonq15lZ0galIDdB5qLgZFlXqwTwlyirhBbJZFtWvC2eJhPY3GGX3iLumKkJLARyBCjhTwBM14cil4c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=eKJcaOYE; 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="eKJcaOYE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2AC81F000E9; Thu, 16 Jul 2026 13:44:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784209476; bh=wUzFHC1vDDZjcmCv7BzcwXc+Yt1Ba7ys3YKOnas0gew=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=eKJcaOYEdz2VsQpO6AAVRjyIVhvfNFcmh6vL21NUgjoNPScc8bKBd0ZdDJGVVbCmE +emdQoCVe2+AwZ5vOQhMRNJTwBVg5blX3QUPHPNZ+XRv6FOVu6t8DyxFF5NF/vkv07 gIu4O4k8mAtGMMo5lgVPT2hoYlN+dYpla7UV2CK4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Westphal Subject: [PATCH 7.1 199/518] netfilter: ebtables: zero chainstack array Date: Thu, 16 Jul 2026 15:27:47 +0200 Message-ID: <20260716133052.178718593@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260716133047.772246337@linuxfoundation.org> References: <20260716133047.772246337@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 7.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Florian Westphal commit cbfe53599eebffd188938ab6774cc41794f6f9d5 upstream. sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free? If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1]. Not a real-world bug, such allocation isn't expected to fail in the first place. Cc: stable@vger.kernel.org Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Florian Westphal Signed-off-by: Greg Kroah-Hartman --- net/bridge/netfilter/ebtables.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -921,8 +921,7 @@ static int translate_table(struct net *n * if an error occurs */ newinfo->chainstack = - vmalloc_array(nr_cpu_ids, - sizeof(*(newinfo->chainstack))); + vcalloc(nr_cpu_ids, sizeof(*(newinfo->chainstack))); if (!newinfo->chainstack) return -ENOMEM; for_each_possible_cpu(i) {