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 7B08A25DB1C; Mon, 9 Feb 2026 14:45:54 +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=1770648354; cv=none; b=n8qJz2l1TTgUVUWrUv0oiCDV+fvFTMbCZeFtMlem5xXpqP9fORVCQTwGMeL1UllZcN+o7APR3XYz9lkZUp3922DH/04pJu455Zipdkklw5UnEH5z3MjZSEPkcFqeWSw8nmPQAq5sDGIeNuZHBtVP/ARbHMKj4JVyk6a//X5nZi4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770648354; c=relaxed/simple; bh=5JTXuoIwW1pspNy+mDG4w85hQK7du3gZ1hnWdrVbyWA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PMmYPDmYOsHDCQDjblL9uJllQhyjXM2icuJcRA2DQXItGH98gvXaLVPgUx23OGK0VPPSjO1kOvhT6Eg7ko6yVeSXy8e6OqLeleUcJ0AYvrXxxcXet/g+1jFA39tCyhK6cvCQFn1RZQYB80lhjVGLZnibeBS6U/ndJvU53OyyZv4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0R7T9zi5; 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="0R7T9zi5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B317EC116C6; Mon, 9 Feb 2026 14:45:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1770648354; bh=5JTXuoIwW1pspNy+mDG4w85hQK7du3gZ1hnWdrVbyWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0R7T9zi5HjTFF0sBKXjmSeFZjavVqCrMVjT+Kz6n/H0kMKgtIHYkCDT/uVdqE/67X 6m0cOx6mHe2Mjg4Q4d9GvjlkjE3g0+Hgos/sQf5QCEvHqoxeUPuhc2VrHROwAY7FN8 yxCynFqt/4cENV8LNvoqYiAbocLA/ACAyqUi10Po= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stefano Brivio , Pablo Neira Ayuso , Keerthana K Subject: [PATCH 6.6 13/86] netfilter: nft_set_pipapo: clamp maximum map bucket size to INT_MAX Date: Mon, 9 Feb 2026 15:23:36 +0100 Message-ID: <20260209142305.256789021@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260209142304.770150175@linuxfoundation.org> References: <20260209142304.770150175@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pablo Neira Ayuso commit b85e3367a5716ed3662a4fe266525190d2af76df upstream. Otherwise, it is possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when resizing hashtable because __GFP_NOWARN is unset. Similar to: b541ba7d1f5a ("netfilter: conntrack: clamp maximum hashtable size to INT_MAX") Reviewed-by: Stefano Brivio Signed-off-by: Pablo Neira Ayuso [ Keerthana: Handle freeing new_lt ] Signed-off-by: Keerthana K Signed-off-by: Greg Kroah-Hartman --- net/netfilter/nft_set_pipapo.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/net/netfilter/nft_set_pipapo.c +++ b/net/netfilter/nft_set_pipapo.c @@ -667,6 +667,11 @@ static int pipapo_resize(struct nft_pipa } mt: + if (rules > (INT_MAX / sizeof(*new_mt))) { + kvfree(new_lt); + return -ENOMEM; + } + new_mt = kvmalloc(rules * sizeof(*new_mt), GFP_KERNEL); if (!new_mt) { kvfree(new_lt); @@ -1359,6 +1364,9 @@ static struct nft_pipapo_match *pipapo_c src->bsize * sizeof(*dst->lt) * src->groups * NFT_PIPAPO_BUCKETS(src->bb)); + if (src->rules > (INT_MAX / sizeof(*src->mt))) + goto out_mt; + dst->mt = kvmalloc(src->rules * sizeof(*src->mt), GFP_KERNEL); if (!dst->mt) goto out_mt;