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 1E1B61420A5; Tue, 27 Feb 2024 14:01:11 +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=1709042471; cv=none; b=Mwv7WX4QLcWXT5WzRKu8/pn9R/NcH2THfnhVJu3tYPF/ocU3tLLU2ccyLBbyBDTQhSwEJufZMrmpmcdPp/D0h7uxIStsq7SH9KjZIc6s30j7YmVzmusqUPJhs0aEHZvZ4+17eTGxB/ahse/2s9mKpImDSY66n8nlA0wbhPIGFVY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709042471; c=relaxed/simple; bh=tymbMX35c4EvM6lftbxTZE5GhUtg8nt2rcanNJ+5RBw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mmLHMCd9mskgogxHrxL25XhXQ6W9feJeXHXi0FkUXEXDFo3zGZoLgZJgQjoYfKq0mPNTeIGklJBDMomBFvxYx8JsNJBgV1d3VKMqbc0qpKiGUKs3FhNpK27lsC1KswirNjBubrRrVWWZXk0esl6tGUawNf8NwltH3rstPcyl4WY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=q5Cqk07M; 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="q5Cqk07M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A3386C433C7; Tue, 27 Feb 2024 14:01:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1709042471; bh=tymbMX35c4EvM6lftbxTZE5GhUtg8nt2rcanNJ+5RBw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=q5Cqk07Mt7i52rlkCjp77WrsD9DW9/jJNheJ1lgLrQ6/Wn7RRRX07O1eeqIV01iX+ FEnpGN5gZ/JKqWIW1dRnFGTUPQjokyM+VwcmT0bOxvcg6IiCY+7gyNced1WAzxykIl ee/WNbZXt2xxMYN2pn9AYJme47LK7QrwfsqSYqMY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Florian Westphal , Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 6.6 273/299] netfilter: nft_flow_offload: release dst in case direct xmit path is used Date: Tue, 27 Feb 2024 14:26:24 +0100 Message-ID: <20240227131634.465588695@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240227131625.847743063@linuxfoundation.org> References: <20240227131625.847743063@linuxfoundation.org> User-Agent: quilt/0.67 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pablo Neira Ayuso [ Upstream commit 8762785f459be1cfe6fcf7285c123aad6a3703f0 ] Direct xmit does not use it since it calls dev_queue_xmit() to send packets, hence it calls dst_release(). kmemleak reports: unreferenced object 0xffff88814f440900 (size 184): comm "softirq", pid 0, jiffies 4294951896 hex dump (first 32 bytes): 00 60 5b 04 81 88 ff ff 00 e6 e8 82 ff ff ff ff .`[............. 21 0b 50 82 ff ff ff ff 00 00 00 00 00 00 00 00 !.P............. backtrace (crc cb2bf5d6): [<000000003ee17107>] kmem_cache_alloc+0x286/0x340 [<0000000021a5de2c>] dst_alloc+0x43/0xb0 [<00000000f0671159>] rt_dst_alloc+0x2e/0x190 [<00000000fe5092c9>] __mkroute_output+0x244/0x980 [<000000005fb96fb0>] ip_route_output_flow+0xc0/0x160 [<0000000045367433>] nf_ip_route+0xf/0x30 [<0000000085da1d8e>] nf_route+0x2d/0x60 [<00000000d1ecd1cb>] nft_flow_route+0x171/0x6a0 [nft_flow_offload] [<00000000d9b2fb60>] nft_flow_offload_eval+0x4e8/0x700 [nft_flow_offload] [<000000009f447dbb>] expr_call_ops_eval+0x53/0x330 [nf_tables] [<00000000072e1be6>] nft_do_chain+0x17c/0x840 [nf_tables] [<00000000d0551029>] nft_do_chain_inet+0xa1/0x210 [nf_tables] [<0000000097c9d5c6>] nf_hook_slow+0x5b/0x160 [<0000000005eccab1>] ip_forward+0x8b6/0x9b0 [<00000000553a269b>] ip_rcv+0x221/0x230 [<00000000412872e5>] __netif_receive_skb_one_core+0xfe/0x110 Fixes: fa502c865666 ("netfilter: flowtable: simplify route logic") Reported-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/nf_flow_table_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c index 7502d6d73a600..a0571339239c4 100644 --- a/net/netfilter/nf_flow_table_core.c +++ b/net/netfilter/nf_flow_table_core.c @@ -132,6 +132,7 @@ static int flow_offload_fill_route(struct flow_offload *flow, ETH_ALEN); flow_tuple->out.ifidx = route->tuple[dir].out.ifindex; flow_tuple->out.hw_ifidx = route->tuple[dir].out.hw_ifindex; + dst_release(dst); break; case FLOW_OFFLOAD_XMIT_XFRM: case FLOW_OFFLOAD_XMIT_NEIGH: -- 2.43.0