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 BFB9C3D8125; Wed, 8 Apr 2026 18:47:07 +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=1775674027; cv=none; b=qPK+5eiZsmGiyIUzv9ScROi4wLNk3haS29FslJUTfiWUIMqQEDQU8Pj3my98ojT5vNNOtenMXKDDcG9OnrR4jfA+dENwoo83UCqPFOSpK6TxCltG6LqDBuqf8jJsFT/VG7kGu2sBWvy45HeW58IV85MNHTwYFcgxtaAsb3D4ie4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775674027; c=relaxed/simple; bh=uxoahiDBuq3ssqvIrIf4Gu8KHjEs9QHfgKKU82/sMvI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=MWq9TeJsfrzQi1KrqQnRooOB+x7GxRaq863IDgaPBuco5lQcpfqg/tHNFRrrv54g11I466lDN6CjUnbNB6iJUyXxHRfCfgNtEbzIFhlbgFedwe1p7ATka+sJMVcH445fPRS6VFLFAF4Hkj/SM79ieO0UaiRlhQ/opn7agY9K/PM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nfkNw2wz; 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="nfkNw2wz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5569EC19421; Wed, 8 Apr 2026 18:47:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1775674027; bh=uxoahiDBuq3ssqvIrIf4Gu8KHjEs9QHfgKKU82/sMvI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nfkNw2wzBNIHf4caDgR+u+H8RUiyGYz/0MtNdR86o9V+nKPmNCVQhB7N1S0XgU/6L lrMtADMkogienqBsLzMBm5Z6pnuh8zlmf+QuTsDHIxkDz7vP/bDhIxFIQv+rWeQgEJ /kdd2si3IPW/RPyWcJuDXmmFc/yAb6PmMNtk/Rk4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Juefei Pu , Xin Liu , Yifan Wu , Yuan Tan , Phil Sutter , Pablo Neira Ayuso Subject: [PATCH 6.12 182/242] netfilter: ipset: drop logically empty buckets in mtype_del Date: Wed, 8 Apr 2026 20:03:42 +0200 Message-ID: <20260408175933.896441949@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260408175927.064985309@linuxfoundation.org> References: <20260408175927.064985309@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yifan Wu commit 9862ef9ab0a116c6dca98842aab7de13a252ae02 upstream. mtype_del() counts empty slots below n->pos in k, but it only drops the bucket when both n->pos and k are zero. This misses buckets whose live entries have all been removed while n->pos still points past deleted slots. Treat a bucket as empty when all positions below n->pos are unused and release it directly instead of shrinking it further. Fixes: 8af1c6fbd923 ("netfilter: ipset: Fix forceadd evaluation path") Cc: stable@vger.kernel.org Reported-by: Juefei Pu Reported-by: Xin Liu Signed-off-by: Yifan Wu Co-developed-by: Yuan Tan Signed-off-by: Yuan Tan Reviewed-by: Phil Sutter Signed-off-by: Pablo Neira Ayuso Signed-off-by: Greg Kroah-Hartman --- net/netfilter/ipset/ip_set_hash_gen.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/netfilter/ipset/ip_set_hash_gen.h +++ b/net/netfilter/ipset/ip_set_hash_gen.h @@ -1099,7 +1099,7 @@ mtype_del(struct ip_set *set, void *valu if (!test_bit(i, n->used)) k++; } - if (n->pos == 0 && k == 0) { + if (k == n->pos) { t->hregion[r].ext_size -= ext_size(n->size, dsize); rcu_assign_pointer(hbucket(t, key), NULL); kfree_rcu(n, rcu);