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GET /api/1.1/patches/2231770/?format=api
{ "id": 2231770, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2231770/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260501122237.296262-2-pablo@netfilter.org/", "project": { "id": 26, "url": "http://patchwork.ozlabs.org/api/1.1/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 }, "msgid": "<20260501122237.296262-2-pablo@netfilter.org>", "date": "2026-05-01T12:22:24", "name": "[net,01/14] netfilter: replace skb_try_make_writable() by skb_ensure_writable()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c3281a270636241f67c06af26678734bf7e0171c", "submitter": { "id": 1315, "url": "http://patchwork.ozlabs.org/api/1.1/people/1315/?format=api", "name": "Pablo Neira Ayuso", "email": "pablo@netfilter.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260501122237.296262-2-pablo@netfilter.org/mbox/", "series": [ { "id": 502449, "url": "http://patchwork.ozlabs.org/api/1.1/series/502449/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=502449", "date": "2026-05-01T12:22:23", "name": "[net,01/14] netfilter: replace skb_try_make_writable() by skb_ensure_writable()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502449/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231770/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231770/checks/", "tags": {}, "headers": { "Return-Path": "\n <netfilter-devel+bounces-12372-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 (2048-bit key;\n unprotected) header.d=netfilter.org header.i=@netfilter.org\n header.a=rsa-sha256 header.s=2025 header.b=vivOYYYa;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-12372-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=netfilter.org header.i=@netfilter.org\n header.b=\"vivOYYYa\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=217.70.190.124", "smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=netfilter.org", "smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=netfilter.org" ], "Received": [ "from sea.lore.kernel.org (sea.lore.kernel.org\n [IPv6:2600:3c0a:e001:db::12fc:5321])\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 4g6VYn1pCZz1y04\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 01 May 2026 22:23:09 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id AB0E8301E3D4\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 1 May 2026 12:22:48 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 601773A1E67;\n\tFri, 1 May 2026 12:22:47 +0000 (UTC)", "from mail.netfilter.org (mail.netfilter.org [217.70.190.124])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 56F4733DEFC;\n\tFri, 1 May 2026 12:22:45 +0000 (UTC)", "from localhost.localdomain (mail-agni [217.70.190.124])\n\tby mail.netfilter.org (Postfix) with ESMTPSA id 3D5676017E;\n\tFri, 1 May 2026 14:22:43 +0200 (CEST)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1777638166; cv=none;\n b=QTD+Q/xYDEPvmPijZ2FTeobdptXnnID0aZaRPH2MWYMHO/CjsFB1mEhbqWLUTjuxblOkTVN0EO29lQ2KBzo7FuzvsRyFaM0Yr2/CBeyHUJ5lCrhhwJsTiZvEz7DNZcD73pPQQMYGuqjdPLJww20UYHLKIqVs5WgwuLgCjPCq7WY=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777638166; c=relaxed/simple;\n\tbh=bhiKm6M74xm031cVP6+ToqroBKbknE/Nv2ppBGtPndA=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=Kt7z9KdyiGy1fpoWH7oGTjBc42m/hbAYCO3uBtY/iLRGDdaT/QHKi2ECjoHOLK+7SrEPyCJjvBgpLY2tCm4CHpKbLDydT5PY+/4FNkoU4PI7qGH9YhQMdUbFTjLn87rnu+YpnO0rdk5tp32VuDH3MJgGcHdW9tfRvoGrd7vg29Q=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=none (p=none dis=none) header.from=netfilter.org;\n spf=pass smtp.mailfrom=netfilter.org;\n dkim=pass (2048-bit key) header.d=netfilter.org header.i=@netfilter.org\n header.b=vivOYYYa; arc=none smtp.client-ip=217.70.190.124", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=netfilter.org;\n\ts=2025; t=1777638163;\n\tbh=6Fbmlx9W1FFkks5H2o6ltT3KOGrIEtVpn4vAhzuEI7w=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=vivOYYYanONMjDcIg2O57jlbHZMIwc0P6aMSgijIqgHSXNeJzl2K6f8Pis28adh6g\n\t 91rbsdS/S80gcMoy5UJQKfhNnzdIbKKtRqfBh9rDsuNmpJ4T47ZLxUXoaPb3WzeF5c\n\t VcOZawwygriGeeqS0ASWAYRJ7GdQQKbzLHdOK57q32kPK4s4ZYDsDU85alhASSDMVo\n\t 8c2UzhpLaaImJuGrERP2JNyG2YpmjyOJoqZZnwGfIwcWig7wgHB3ZWqZ2IU1AJqJ1M\n\t tIT8CloORRceSbwuXlwvW6jj0nfjYkgN8K88ZCLyYIt+mXiNk1k8r9UsU3kuu2vGp8\n\t mdzwHwIzI0gpA==", "From": "Pablo Neira Ayuso <pablo@netfilter.org>", "To": "netfilter-devel@vger.kernel.org", "Cc": "davem@davemloft.net,\n\tnetdev@vger.kernel.org,\n\tkuba@kernel.org,\n\tpabeni@redhat.com,\n\tedumazet@google.com,\n\tfw@strlen.de,\n\thorms@kernel.org", "Subject": "[PATCH net 01/14] netfilter: replace skb_try_make_writable() by\n skb_ensure_writable()", "Date": "Fri, 1 May 2026 14:22:24 +0200", "Message-ID": "<20260501122237.296262-2-pablo@netfilter.org>", "X-Mailer": "git-send-email 2.47.3", "In-Reply-To": "<20260501122237.296262-1-pablo@netfilter.org>", "References": "<20260501122237.296262-1-pablo@netfilter.org>", "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" }, "content": "skb_try_make_writable() only works on clones and uncloned packets might\nhave their network header in paged fragments.\n\nnft_fwd needs to work for the ingress and egress hooks, but the egress\nhook where skb->data points to the mac header, use skb_network_offset()\nto include the mac header. The flowtable is fine since it already uses\nthe transport offset.\n\nFixes: d32de98ea70f (\"netfilter: nft_fwd_netdev: allow to forward packets via neighbour layer\")\nFixes: 7d2086871762 (\"netfilter: nf_flow_table: move ipv4 offload hook code to nf_flow_table\")\nSigned-off-by: Pablo Neira Ayuso <pablo@netfilter.org>\n---\n net/netfilter/nf_flow_table_ip.c | 4 ++--\n net/netfilter/nft_fwd_netdev.c | 5 +++--\n 2 files changed, 5 insertions(+), 4 deletions(-)", "diff": "diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c\nindex fd56d663cb5b..dbd7644fdbeb 100644\n--- a/net/netfilter/nf_flow_table_ip.c\n+++ b/net/netfilter/nf_flow_table_ip.c\n@@ -524,7 +524,7 @@ static int nf_flow_offload_forward(struct nf_flowtable_ctx *ctx,\n \t\treturn 0;\n \t}\n \n-\tif (skb_try_make_writable(skb, thoff + ctx->hdrsize))\n+\tif (skb_ensure_writable(skb, thoff + ctx->hdrsize))\n \t\treturn -1;\n \n \tflow_offload_refresh(flow_table, flow, false);\n@@ -1037,7 +1037,7 @@ static int nf_flow_offload_ipv6_forward(struct nf_flowtable_ctx *ctx,\n \t\treturn 0;\n \t}\n \n-\tif (skb_try_make_writable(skb, thoff + ctx->hdrsize))\n+\tif (skb_ensure_writable(skb, thoff + ctx->hdrsize))\n \t\treturn -1;\n \n \tflow_offload_refresh(flow_table, flow, false);\ndiff --git a/net/netfilter/nft_fwd_netdev.c b/net/netfilter/nft_fwd_netdev.c\nindex 4bce36c3a6a0..2cc809303ce8 100644\n--- a/net/netfilter/nft_fwd_netdev.c\n+++ b/net/netfilter/nft_fwd_netdev.c\n@@ -100,6 +100,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,\n \tint oif = regs->data[priv->sreg_dev];\n \tunsigned int verdict = NF_STOLEN;\n \tstruct sk_buff *skb = pkt->skb;\n+\tint nhoff = skb_network_offset(skb);\n \tstruct net_device *dev;\n \tint neigh_table;\n \n@@ -111,7 +112,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,\n \t\t\tverdict = NFT_BREAK;\n \t\t\tgoto out;\n \t\t}\n-\t\tif (skb_try_make_writable(skb, sizeof(*iph))) {\n+\t\tif (skb_ensure_writable(skb, nhoff + sizeof(*iph))) {\n \t\t\tverdict = NF_DROP;\n \t\t\tgoto out;\n \t\t}\n@@ -132,7 +133,7 @@ static void nft_fwd_neigh_eval(const struct nft_expr *expr,\n \t\t\tverdict = NFT_BREAK;\n \t\t\tgoto out;\n \t\t}\n-\t\tif (skb_try_make_writable(skb, sizeof(*ip6h))) {\n+\t\tif (skb_ensure_writable(skb, nhoff + sizeof(*ip6h))) {\n \t\t\tverdict = NF_DROP;\n \t\t\tgoto out;\n \t\t}\n", "prefixes": [ "net", "01/14" ] }