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GET /api/1.2/patches/2222583/?format=api
{ "id": 2222583, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2222583/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260413043223.3327827-1-keerthana.kalyanasundaram@broadcom.com/", "project": { "id": 26, "url": "http://patchwork.ozlabs.org/api/1.2/projects/26/?format=api", "name": "Netfilter Development", "link_name": "netfilter-devel", "list_id": "netfilter-devel.vger.kernel.org", "list_email": "netfilter-devel@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260413043223.3327827-1-keerthana.kalyanasundaram@broadcom.com>", "list_archive_url": null, "date": "2026-04-13T04:32:23", "name": "[v6.6] netfilter: nft_set_pipapo: do not rely on ZERO_SIZE_PTR", "commit_ref": null, "pull_url": null, "state": "not-applicable", "archived": true, "hash": "4b35745a6b7ece8c1a2e8e32b2be7cda1feb72eb", "submitter": { "id": 92585, "url": "http://patchwork.ozlabs.org/api/1.2/people/92585/?format=api", "name": "Keerthana K", "email": "keerthana.kalyanasundaram@broadcom.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260413043223.3327827-1-keerthana.kalyanasundaram@broadcom.com/mbox/", "series": [ { "id": 499643, "url": "http://patchwork.ozlabs.org/api/1.2/series/499643/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=499643", "date": "2026-04-13T04:32:23", "name": "[v6.6] netfilter: nft_set_pipapo: do not rely on ZERO_SIZE_PTR", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499643/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222583/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222583/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <netfilter-devel+bounces-11837-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "netfilter-devel@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=broadcom.com header.i=@broadcom.com header.a=rsa-sha256\n header.s=google header.b=HpSI2RVO;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.232.135.74; helo=sto.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-11837-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com\n header.b=\"HpSI2RVO\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=74.125.82.98", "smtp.subspace.kernel.org;\n dmarc=pass (p=reject dis=none) header.from=broadcom.com", "smtp.subspace.kernel.org;\n spf=fail smtp.mailfrom=broadcom.com" ], "Received": [ "from sto.lore.kernel.org (sto.lore.kernel.org [172.232.135.74])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fvF7g1pKYz1y2d\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 13 Apr 2026 14:39:59 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sto.lore.kernel.org (Postfix) with ESMTP id 314713004DEC\n\tfor <incoming@patchwork.ozlabs.org>; Mon, 13 Apr 2026 04:39:55 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 10C99383C8D;\n\tMon, 13 Apr 2026 04:39:54 +0000 (UTC)", "from mail-dl1-f98.google.com (mail-dl1-f98.google.com\n [74.125.82.98])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 61057344DB8\n\tfor <netfilter-devel@vger.kernel.org>; Mon, 13 Apr 2026 04:39:52 +0000 (UTC)", "by mail-dl1-f98.google.com with SMTP id\n a92af1059eb24-12c22b9bdabso215174c88.2\n for <netfilter-devel@vger.kernel.org>;\n Sun, 12 Apr 2026 21:39:52 -0700 (PDT)", "from smtp-us-east1-p01-i01-si01.dlp.protect.broadcom.com\n (address-144-49-247-24.dlp.protect.broadcom.com. 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a=rsa-sha256; c=relaxed/relaxed;\n d=broadcom.com; s=google; t=1776055190; x=1776659990;\n darn=vger.kernel.org;\n h=content-transfer-encoding:mime-version:message-id:date:subject:cc\n :to:from:from:to:cc:subject:date:message-id:reply-to;\n bh=9qLamvoygs8XdLleM+az9cX6DHqELe8TmHOQBddVvD8=;\n b=HpSI2RVOGwNnCY0VhVy7LD9oFYUJyBdHxuVeVw3djJOilW/R2fsFD2cFr+pqsg+/uX\n zNkFFt3Lis3oRUqevrv02ssMtrQLNl2Gpd07xwMMD+OfKUB5Lp8KXMmknDbRPseZgSab\n 6BOFACv3iZ98WfiG9WgIP+7KsPngAYBVk2jcI=", "From": "Keerthana K <keerthana.kalyanasundaram@broadcom.com>", "To": "stable@vger.kernel.org,\n\tgregkh@linuxfoundation.org", "Cc": "pablo@netfilter.org,\n\tkadlec@netfilter.org,\n\tfw@strlen.de,\n\tdavem@davemloft.net,\n\tedumazet@google.com,\n\tkuba@kernel.org,\n\tpabeni@redhat.com,\n\tnetfilter-devel@vger.kernel.org,\n\tcoreteam@netfilter.org,\n\tnetdev@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tajay.kaher@broadcom.com,\n\talexey.makhalov@broadcom.com,\n\tvamsi-krishna.brahmajosyula@broadcom.com,\n\tyin.ding@broadcom.com,\n\ttapas.kundu@broadcom.com,\n\tStefano Brivio <sbrivio@redhat.com>,\n\tMukul Sikka <mukul.sikka@broadcom.com>,\n\tBrennan Lamoreaux <brennan.lamoreaux@broadcom.com>,\n\tKeerthana K <keerthana.kalyanasundaram@broadcom.com>", "Subject": "[PATCH v6.6] netfilter: nft_set_pipapo: do not rely on ZERO_SIZE_PTR", "Date": "Mon, 13 Apr 2026 04:32:23 +0000", "Message-ID": "<20260413043223.3327827-1-keerthana.kalyanasundaram@broadcom.com>", "X-Mailer": "git-send-email 2.43.7", "Precedence": "bulk", "X-Mailing-List": "netfilter-devel@vger.kernel.org", "List-Id": "<netfilter-devel.vger.kernel.org>", "List-Subscribe": "<mailto:netfilter-devel+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:netfilter-devel+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-DetectorID-Processed": "b00c1d49-9d2e-4205-b15f-d015386d3d5e" }, "content": "From: Florian Westphal <fw@strlen.de>\n\ncommit 07ace0bbe03b3d8e85869af1dec5e4087b1d57b8 upstream\n\npipapo relies on kmalloc(0) returning ZERO_SIZE_PTR (i.e., not NULL\nbut pointer is invalid).\n\nRework this to not call slab allocator when we'd request a 0-byte\nallocation.\n\nReviewed-by: Stefano Brivio <sbrivio@redhat.com>\nSigned-off-by: Florian Westphal <fw@strlen.de>\nSigned-off-by: Mukul Sikka <mukul.sikka@broadcom.com>\nSigned-off-by: Brennan Lamoreaux <brennan.lamoreaux@broadcom.com>\n[Keerthana: In older stable branches (v6.6 and earlier), the allocation logic in\npipapo_clone() still relies on `src->rules` rather than `src->rules_alloc`\n(introduced in v6.9 via 9f439bd6ef4f). Consequently, the previously\nbackported INT_MAX clamping check uses `src->rules`. This patch correctly\nmoves that `src->rules > (INT_MAX / ...)` check inside the new\n`if (src->rules > 0)` block]\nSigned-off-by: Keerthana K <keerthana.kalyanasundaram@broadcom.com>\n---\n net/netfilter/nft_set_pipapo.c | 20 ++++++++++++++------\n 1 file changed, 14 insertions(+), 6 deletions(-)", "diff": "diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c\nindex c3ada6798d4a..98cdeb9fa210 100644\n--- a/net/netfilter/nft_set_pipapo.c\n+++ b/net/netfilter/nft_set_pipapo.c\n@@ -525,6 +525,8 @@ static struct nft_pipapo_elem *pipapo_get(const struct net *net,\n \tint i;\n \n \tm = priv->clone;\n+\tif (m->bsize_max == 0)\n+\t\treturn ret;\n \n \tres_map = kmalloc_array(m->bsize_max, sizeof(*res_map), GFP_ATOMIC);\n \tif (!res_map) {\n@@ -1394,14 +1396,20 @@ static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old)\n \t\t src->bsize * sizeof(*dst->lt) *\n \t\t src->groups * NFT_PIPAPO_BUCKETS(src->bb));\n \n-\t\tif (src->rules > (INT_MAX / sizeof(*src->mt)))\n-\t\t\tgoto out_mt;\n+\t\tif (src->rules > 0) {\n+\t\t\tif (src->rules > (INT_MAX / sizeof(*src->mt)))\n+\t\t\t\tgoto out_mt;\n \n-\t\tdst->mt = kvmalloc(src->rules * sizeof(*src->mt), GFP_KERNEL_ACCOUNT);\n-\t\tif (!dst->mt)\n-\t\t\tgoto out_mt;\n+\t\t\tdst->mt = kvmalloc_array(src->rules, sizeof(*src->mt),\n+\t\t\t\t\t\t GFP_KERNEL);\n+\t\t\tif (!dst->mt)\n+\t\t\t\tgoto out_mt;\n+\n+\t\t\tmemcpy(dst->mt, src->mt, src->rules * sizeof(*src->mt));\n+\t\t} else {\n+\t\t\tdst->mt = NULL;\n+\t\t}\n \n-\t\tmemcpy(dst->mt, src->mt, src->rules * sizeof(*src->mt));\n \t\tsrc++;\n \t\tdst++;\n \t}\n", "prefixes": [ "v6.6" ] }