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GET /api/patches/2223989/?format=api
{ "id": 2223989, "url": "http://patchwork.ozlabs.org/api/patches/2223989/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260416131453.308611-10-pablo@netfilter.org/", "project": { "id": 26, "url": "http://patchwork.ozlabs.org/api/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": "<20260416131453.308611-10-pablo@netfilter.org>", "list_archive_url": null, "date": "2026-04-16T13:14:51", "name": "[net,09/11] netfilter: nf_tables: use list_del_rcu for netlink hooks", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "2eab15c5b5fcf7fe7f949ed4685a57122659c327", "submitter": { "id": 1315, "url": "http://patchwork.ozlabs.org/api/people/1315/?format=api", "name": "Pablo Neira Ayuso", "email": "pablo@netfilter.org" }, "delegate": { "id": 11902, "url": "http://patchwork.ozlabs.org/api/users/11902/?format=api", "username": "strlen", "first_name": "Florian", "last_name": "Westphal", "email": "fw@strlen.de" }, "mbox": "http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260416131453.308611-10-pablo@netfilter.org/mbox/", "series": [ { "id": 500161, "url": "http://patchwork.ozlabs.org/api/series/500161/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=500161", "date": "2026-04-16T13:14:48", "name": "[net,01/11] netfilter: arp_tables: fix IEEE1394 ARP payload parsing in arp_packet_match()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500161/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2223989/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2223989/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <netfilter-devel+bounces-11977-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=AM5Nki2J;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; helo=sin.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-11977-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=\"AM5Nki2J\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=217.70.190.124", "smtp.subspace.kernel.org;\n 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b=EHgiWfqA/mxNzWXN4/8BFzbN/w11wzlEjskz75PWUmsoJyMPzOpEJgJNIQcc1djRm8a/GRv10VMqJBCKTpKQdzRQ3Nb0/DyRYpr0ixQoQ8nwkmjbNibs+jawyeoZLySYoTELmvNEzROwN2Qv3M5BmZejloopvWN4Q8b4bbqFBfs=", "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=AM5Nki2J; 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=1776345313;\n\tbh=5QNR3mcO0k9+CBSb1u9iJUDckZR+6/nZaFLs5budQho=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=AM5Nki2JBXrv7bFaytTL9ui745c9FcaeNkDAh0azeh0vg6hsN5m+HX/uJXcGcTf6Q\n\t c5GJ1XmSc/vPxPucWHL3vcQ8l4VqlLDV8bciNIBVlOPgBmmI5zR6SWUc4/wSeairC5\n\t Dv7J8KhDpipgmtPBchQU8STJG8CCk9Y1LByPVYd9liP7+IpAi5dDDeGU4mJkf47sXB\n\t G2FaIqonWil1oEeeTFLqmy/H5ZuSMKtzefD6cSoAGkXZTz64ZHRubzZUnLlbSTTOPV\n\t KNr+7ofFTgbY2CQSxXL7XoXxsyAcHagvKg78eR8gjasGQhR2FunH7G4v3Pl98FUwuT\n\t ZfAhDT0O9cl0w==", "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 09/11] netfilter: nf_tables: use list_del_rcu for netlink\n hooks", "Date": "Thu, 16 Apr 2026 15:14:51 +0200", "Message-ID": "<20260416131453.308611-10-pablo@netfilter.org>", "X-Mailer": "git-send-email 2.47.3", "In-Reply-To": "<20260416131453.308611-1-pablo@netfilter.org>", "References": "<20260416131453.308611-1-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": "From: Florian Westphal <fw@strlen.de>\n\nnft_netdev_unregister_hooks and __nft_unregister_flowtable_net_hooks need\nto use list_del_rcu(), this list can be walked by concurrent dumpers.\n\nAdd a new helper and use it consistently.\n\nFixes: f9a43007d3f7 (\"netfilter: nf_tables: double hook unregistration in netns path\")\nSigned-off-by: Florian Westphal <fw@strlen.de>\nSigned-off-by: Pablo Neira Ayuso <pablo@netfilter.org>\n---\n net/netfilter/nf_tables_api.c | 44 ++++++++++++++---------------------\n 1 file changed, 18 insertions(+), 26 deletions(-)", "diff": "diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c\nindex 8c42247a176c..090d4d688a33 100644\n--- a/net/netfilter/nf_tables_api.c\n+++ b/net/netfilter/nf_tables_api.c\n@@ -374,6 +374,12 @@ static void nft_netdev_hook_free_rcu(struct nft_hook *hook)\n \tcall_rcu(&hook->rcu, __nft_netdev_hook_free_rcu);\n }\n \n+static void nft_netdev_hook_unlink_free_rcu(struct nft_hook *hook)\n+{\n+\tlist_del_rcu(&hook->list);\n+\tnft_netdev_hook_free_rcu(hook);\n+}\n+\n static void nft_netdev_unregister_hooks(struct net *net,\n \t\t\t\t\tstruct list_head *hook_list,\n \t\t\t\t\tbool release_netdev)\n@@ -384,10 +390,8 @@ static void nft_netdev_unregister_hooks(struct net *net,\n \tlist_for_each_entry_safe(hook, next, hook_list, list) {\n \t\tlist_for_each_entry(ops, &hook->ops_list, list)\n \t\t\tnf_unregister_net_hook(net, ops);\n-\t\tif (release_netdev) {\n-\t\t\tlist_del(&hook->list);\n-\t\t\tnft_netdev_hook_free_rcu(hook);\n-\t\t}\n+\t\tif (release_netdev)\n+\t\t\tnft_netdev_hook_unlink_free_rcu(hook);\n \t}\n }\n \n@@ -2323,10 +2327,8 @@ void nf_tables_chain_destroy(struct nft_chain *chain)\n \n \t\tif (nft_base_chain_netdev(table->family, basechain->ops.hooknum)) {\n \t\t\tlist_for_each_entry_safe(hook, next,\n-\t\t\t\t\t\t &basechain->hook_list, list) {\n-\t\t\t\tlist_del_rcu(&hook->list);\n-\t\t\t\tnft_netdev_hook_free_rcu(hook);\n-\t\t\t}\n+\t\t\t\t\t\t &basechain->hook_list, list)\n+\t\t\t\tnft_netdev_hook_unlink_free_rcu(hook);\n \t\t}\n \t\tmodule_put(basechain->type->owner);\n \t\tif (rcu_access_pointer(basechain->stats)) {\n@@ -3026,6 +3028,7 @@ static int nf_tables_updchain(struct nft_ctx *ctx, u8 genmask, u8 policy,\n \t\t\t\tlist_for_each_entry(ops, &h->ops_list, list)\n \t\t\t\t\tnf_unregister_net_hook(ctx->net, ops);\n \t\t\t}\n+\t\t\t/* hook.list is on stack, no need for list_del_rcu() */\n \t\t\tlist_del(&h->list);\n \t\t\tnft_netdev_hook_free_rcu(h);\n \t\t}\n@@ -8903,10 +8906,8 @@ static void __nft_unregister_flowtable_net_hooks(struct net *net,\n \tlist_for_each_entry_safe(hook, next, hook_list, list) {\n \t\tlist_for_each_entry(ops, &hook->ops_list, list)\n \t\t\tnft_unregister_flowtable_ops(net, flowtable, ops);\n-\t\tif (release_netdev) {\n-\t\t\tlist_del(&hook->list);\n-\t\t\tnft_netdev_hook_free_rcu(hook);\n-\t\t}\n+\t\tif (release_netdev)\n+\t\t\tnft_netdev_hook_unlink_free_rcu(hook);\n \t}\n }\n \n@@ -8977,8 +8978,7 @@ static int nft_register_flowtable_net_hooks(struct net *net,\n \n \t\t\tnft_unregister_flowtable_ops(net, flowtable, ops);\n \t\t}\n-\t\tlist_del_rcu(&hook->list);\n-\t\tnft_netdev_hook_free_rcu(hook);\n+\t\tnft_netdev_hook_unlink_free_rcu(hook);\n \t}\n \n \treturn err;\n@@ -8988,10 +8988,8 @@ static void nft_hooks_destroy(struct list_head *hook_list)\n {\n \tstruct nft_hook *hook, *next;\n \n-\tlist_for_each_entry_safe(hook, next, hook_list, list) {\n-\t\tlist_del_rcu(&hook->list);\n-\t\tnft_netdev_hook_free_rcu(hook);\n-\t}\n+\tlist_for_each_entry_safe(hook, next, hook_list, list)\n+\t\tnft_netdev_hook_unlink_free_rcu(hook);\n }\n \n static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,\n@@ -9079,8 +9077,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh,\n \t\t\t\tnft_unregister_flowtable_ops(ctx->net,\n \t\t\t\t\t\t\t flowtable, ops);\n \t\t}\n-\t\tlist_del_rcu(&hook->list);\n-\t\tnft_netdev_hook_free_rcu(hook);\n+\t\tnft_netdev_hook_unlink_free_rcu(hook);\n \t}\n \n \treturn err;\n@@ -9586,13 +9583,8 @@ static void nf_tables_flowtable_notify(struct nft_ctx *ctx,\n \n static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable)\n {\n-\tstruct nft_hook *hook, *next;\n-\n \tflowtable->data.type->free(&flowtable->data);\n-\tlist_for_each_entry_safe(hook, next, &flowtable->hook_list, list) {\n-\t\tlist_del_rcu(&hook->list);\n-\t\tnft_netdev_hook_free_rcu(hook);\n-\t}\n+\tnft_hooks_destroy(&flowtable->hook_list);\n \tkfree(flowtable->name);\n \tmodule_put(flowtable->data.type->owner);\n \tkfree(flowtable);\n", "prefixes": [ "net", "09/11" ] }