From patchwork Wed Sep 21 07:38:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Westphal X-Patchwork-Id: 12983317 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0A2E7C6FA82 for ; Wed, 21 Sep 2022 07:38:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230163AbiIUHin (ORCPT ); Wed, 21 Sep 2022 03:38:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230161AbiIUHim (ORCPT ); Wed, 21 Sep 2022 03:38:42 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B66C583F06; Wed, 21 Sep 2022 00:38:41 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1oauJc-0005QQ-1x; Wed, 21 Sep 2022 09:38:40 +0200 From: Florian Westphal To: Cc: netfilter-devel@vger.kernel.org, Jakub Kicinski , Paolo Abeni , "David S. Miller" , Eric Dumazet , Pablo Neira Ayuso , Florian Westphal Subject: [PATCH net 1/5] netfilter: conntrack: remove nf_conntrack_helper documentation Date: Wed, 21 Sep 2022 09:38:21 +0200 Message-Id: <20220921073825.4658-2-fw@strlen.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220921073825.4658-1-fw@strlen.de> References: <20220921073825.4658-1-fw@strlen.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Pablo Neira Ayuso This toggle has been already remove by b118509076b3 ("netfilter: remove nf_conntrack_helper sysctl and modparam toggles"). Remove the documentation entry for this toggle too. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Florian Westphal --- Documentation/networking/nf_conntrack-sysctl.rst | 9 --------- 1 file changed, 9 deletions(-) diff --git a/Documentation/networking/nf_conntrack-sysctl.rst b/Documentation/networking/nf_conntrack-sysctl.rst index 834945ebc4cd..1120d71f28d7 100644 --- a/Documentation/networking/nf_conntrack-sysctl.rst +++ b/Documentation/networking/nf_conntrack-sysctl.rst @@ -70,15 +70,6 @@ nf_conntrack_generic_timeout - INTEGER (seconds) Default for generic timeout. This refers to layer 4 unknown/unsupported protocols. -nf_conntrack_helper - BOOLEAN - - 0 - disabled (default) - - not 0 - enabled - - Enable automatic conntrack helper assignment. - If disabled it is required to set up iptables rules to assign - helpers to connections. See the CT target description in the - iptables-extensions(8) man page for further information. - nf_conntrack_icmp_timeout - INTEGER (seconds) default 30 From patchwork Wed Sep 21 07:38:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Westphal X-Patchwork-Id: 12983318 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4C203ECAAD8 for ; Wed, 21 Sep 2022 07:38:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230235AbiIUHiv (ORCPT ); Wed, 21 Sep 2022 03:38:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58802 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230214AbiIUHis (ORCPT ); Wed, 21 Sep 2022 03:38:48 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4F9E683F38; Wed, 21 Sep 2022 00:38:47 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1oauJg-0005Qh-AM; Wed, 21 Sep 2022 09:38:44 +0200 From: Florian Westphal To: Cc: netfilter-devel@vger.kernel.org, Jakub Kicinski , Paolo Abeni , "David S. Miller" , Eric Dumazet , Tetsuo Handa , syzbot , Florian Westphal Subject: [PATCH net 2/5] netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain() Date: Wed, 21 Sep 2022 09:38:22 +0200 Message-Id: <20220921073825.4658-3-fw@strlen.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220921073825.4658-1-fw@strlen.de> References: <20220921073825.4658-1-fw@strlen.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Tetsuo Handa syzbot is reporting underflow of nft_counters_enabled counter at nf_tables_addchain() [1], for commit 43eb8949cfdffa76 ("netfilter: nf_tables: do not leave chain stats enabled on error") missed that nf_tables_chain_destroy() after nft_basechain_init() in the error path of nf_tables_addchain() decrements the counter because nft_basechain_init() makes nft_is_base_chain() return true by setting NFT_CHAIN_BASE flag. Increment the counter immediately after returning from nft_basechain_init(). Link: https://syzkaller.appspot.com/bug?extid=b5d82a651b71cd8a75ab [1] Reported-by: syzbot Signed-off-by: Tetsuo Handa Tested-by: syzbot Fixes: 43eb8949cfdffa76 ("netfilter: nf_tables: do not leave chain stats enabled on error") Signed-off-by: Florian Westphal --- net/netfilter/nf_tables_api.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 816052089b33..e062754dc6cc 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -2197,7 +2197,6 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, struct netlink_ext_ack *extack) { const struct nlattr * const *nla = ctx->nla; - struct nft_stats __percpu *stats = NULL; struct nft_table *table = ctx->table; struct nft_base_chain *basechain; struct net *net = ctx->net; @@ -2212,6 +2211,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, return -EOVERFLOW; if (nla[NFTA_CHAIN_HOOK]) { + struct nft_stats __percpu *stats = NULL; struct nft_chain_hook hook; if (flags & NFT_CHAIN_BINDING) @@ -2245,6 +2245,8 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, kfree(basechain); return err; } + if (stats) + static_branch_inc(&nft_counters_enabled); } else { if (flags & NFT_CHAIN_BASE) return -EINVAL; @@ -2319,9 +2321,6 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, goto err_unregister_hook; } - if (stats) - static_branch_inc(&nft_counters_enabled); - table->use++; return 0; From patchwork Wed Sep 21 07:38:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Westphal X-Patchwork-Id: 12983319 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C598AC32771 for ; Wed, 21 Sep 2022 07:38:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230214AbiIUHix (ORCPT ); Wed, 21 Sep 2022 03:38:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230257AbiIUHiv (ORCPT ); Wed, 21 Sep 2022 03:38:51 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 175DD83F06; Wed, 21 Sep 2022 00:38:50 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1oauJk-0005RG-F7; Wed, 21 Sep 2022 09:38:48 +0200 From: Florian Westphal To: Cc: netfilter-devel@vger.kernel.org, Jakub Kicinski , Paolo Abeni , "David S. Miller" , Eric Dumazet , Tetsuo Handa , Florian Westphal Subject: [PATCH net 3/5] netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain() Date: Wed, 21 Sep 2022 09:38:23 +0200 Message-Id: <20220921073825.4658-4-fw@strlen.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220921073825.4658-1-fw@strlen.de> References: <20220921073825.4658-1-fw@strlen.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Tetsuo Handa It seems to me that percpu memory for chain stats started leaking since commit 3bc158f8d0330f0a ("netfilter: nf_tables: map basechain priority to hardware priority") when nft_chain_offload_priority() returned an error. Signed-off-by: Tetsuo Handa Fixes: 3bc158f8d0330f0a ("netfilter: nf_tables: map basechain priority to hardware priority") Signed-off-by: Florian Westphal --- net/netfilter/nf_tables_api.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index e062754dc6cc..63c70141b3e5 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -2243,6 +2243,7 @@ static int nf_tables_addchain(struct nft_ctx *ctx, u8 family, u8 genmask, if (err < 0) { nft_chain_release_hook(&hook); kfree(basechain); + free_percpu(stats); return err; } if (stats) From patchwork Wed Sep 21 07:38:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Westphal X-Patchwork-Id: 12983320 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8E0A3C6FA82 for ; Wed, 21 Sep 2022 07:39:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230296AbiIUHi7 (ORCPT ); Wed, 21 Sep 2022 03:38:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230198AbiIUHi5 (ORCPT ); Wed, 21 Sep 2022 03:38:57 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69581844C0; Wed, 21 Sep 2022 00:38:54 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1oauJo-0005Rq-LX; Wed, 21 Sep 2022 09:38:52 +0200 From: Florian Westphal To: Cc: netfilter-devel@vger.kernel.org, Jakub Kicinski , Paolo Abeni , "David S. Miller" , Eric Dumazet , Florian Westphal , syzbot+a24c5252f3e3ab733464@syzkaller.appspotmail.com Subject: [PATCH net 4/5] netfilter: ebtables: fix memory leak when blob is malformed Date: Wed, 21 Sep 2022 09:38:24 +0200 Message-Id: <20220921073825.4658-5-fw@strlen.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220921073825.4658-1-fw@strlen.de> References: <20220921073825.4658-1-fw@strlen.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The bug fix was incomplete, it "replaced" crash with a memory leak. The old code had an assignment to "ret" embedded into the conditional, restore this. Fixes: 7997eff82828 ("netfilter: ebtables: reject blobs that don't provide all entry points") Reported-and-tested-by: syzbot+a24c5252f3e3ab733464@syzkaller.appspotmail.com Signed-off-by: Florian Westphal --- net/bridge/netfilter/ebtables.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c index 9a0ae59cdc50..4f385d52a1c4 100644 --- a/net/bridge/netfilter/ebtables.c +++ b/net/bridge/netfilter/ebtables.c @@ -1040,8 +1040,10 @@ static int do_replace_finish(struct net *net, struct ebt_replace *repl, goto free_iterate; } - if (repl->valid_hooks != t->valid_hooks) + if (repl->valid_hooks != t->valid_hooks) { + ret = -EINVAL; goto free_unlock; + } if (repl->num_counters && repl->num_counters != t->private->nentries) { ret = -EINVAL; From patchwork Wed Sep 21 07:38:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Westphal X-Patchwork-Id: 12983321 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02241C6FA82 for ; Wed, 21 Sep 2022 07:39:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230198AbiIUHjC (ORCPT ); Wed, 21 Sep 2022 03:39:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230257AbiIUHi7 (ORCPT ); Wed, 21 Sep 2022 03:38:59 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B70AC83F29; Wed, 21 Sep 2022 00:38:58 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1oauJs-0005SB-Ry; Wed, 21 Sep 2022 09:38:56 +0200 From: Florian Westphal To: Cc: netfilter-devel@vger.kernel.org, Jakub Kicinski , Paolo Abeni , "David S. Miller" , Eric Dumazet , Florian Westphal , Bruno de Paula Larini Subject: [PATCH net 5/5] netfilter: nf_ct_ftp: fix deadlock when nat rewrite is needed Date: Wed, 21 Sep 2022 09:38:25 +0200 Message-Id: <20220921073825.4658-6-fw@strlen.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220921073825.4658-1-fw@strlen.de> References: <20220921073825.4658-1-fw@strlen.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org We can't use ct->lock, this is already used by the seqadj internals. When using ftp helper + nat, seqadj will attempt to acquire ct->lock again. Revert back to a global lock for now. Fixes: c783a29c7e59 ("netfilter: nf_ct_ftp: prefer skb_linearize") Reported-by: Bruno de Paula Larini Signed-off-by: Florian Westphal --- net/netfilter/nf_conntrack_ftp.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/netfilter/nf_conntrack_ftp.c b/net/netfilter/nf_conntrack_ftp.c index 0d9332e9cf71..617f744a2e3a 100644 --- a/net/netfilter/nf_conntrack_ftp.c +++ b/net/netfilter/nf_conntrack_ftp.c @@ -33,6 +33,7 @@ MODULE_AUTHOR("Rusty Russell "); MODULE_DESCRIPTION("ftp connection tracking helper"); MODULE_ALIAS("ip_conntrack_ftp"); MODULE_ALIAS_NFCT_HELPER(HELPER_NAME); +static DEFINE_SPINLOCK(nf_ftp_lock); #define MAX_PORTS 8 static u_int16_t ports[MAX_PORTS]; @@ -409,7 +410,8 @@ static int help(struct sk_buff *skb, } datalen = skb->len - dataoff; - spin_lock_bh(&ct->lock); + /* seqadj (nat) uses ct->lock internally, nf_nat_ftp would cause deadlock */ + spin_lock_bh(&nf_ftp_lock); fb_ptr = skb->data + dataoff; ends_in_nl = (fb_ptr[datalen - 1] == '\n'); @@ -538,7 +540,7 @@ static int help(struct sk_buff *skb, if (ends_in_nl) update_nl_seq(ct, seq, ct_ftp_info, dir, skb); out: - spin_unlock_bh(&ct->lock); + spin_unlock_bh(&nf_ftp_lock); return ret; }