From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta0.migadu.com (out-179.mta0.migadu.com [91.218.175.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D72C13DC4CD for ; Thu, 20 Aug 2026 08:22:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787214152; cv=none; b=V67l2CY4NDTFsaAItsWwQVaOhWPtuGO08okUNIsYroX2dLOyf6LKelPnpE5hHGeqUwXfB3A52tleYgmbeX67sc7veu/4fXS+K3vYTV4CImgvwzEMi7y7hgffZ9FF0LlS+1We+5gtsXWgfJq2Xlr79Vqg5VPPlPz+o836fagumgo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787214152; c=relaxed/simple; bh=5e4/NzEnnNFweGYid+yLmS17Rqq2lfwGeVusJa5NcBI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=PfDq377gSy3l/cYZBVxFYXF/7KBcZwMizDECIL0FaJTAmGxqfmam+bwxHZPjEhWJ7CS9WqZwONgFubdS/ln/PKM2wMKlzPWvcVi3OYrQIxt2g3jnwt6egVFnJGjSOhxjG8IslEuNRV7BDdS3aeVh+ehwk0+04Pr+U2WJDusiVNc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=pI6SDRTG; arc=none smtp.client-ip=91.218.175.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="pI6SDRTG" X-Envelope-To: linux-kernel@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=5e4/NzEnnNFweGYid+yLmS17Rqq2lfwGeVusJa5NcBI=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1787214149; v=1; x=1787818949; b=pI6SDRTGgKp0zCOOtW8IZ/vtti9gD+QAHQXSoOnyDv4HPTBds5dbXhkxAcQswHCMH/69n5y4 C0rIdfQJaDkzgLJiIKLXI2wq2y1Rik/IREgz7nDKPVHrcz4fwzJx/Id9tT+DPHlVZp5a2A9t+cZ JqbVvH0y8dNSKG/hIHStN040= X-Envelope-To: linux-kernel@vger.kernel.org Received: from [198.18.0.1] (116.128.244.171) by smtp.migadu.com with ESMTPS id c68b9dbf0f5c289f; Thu, 20 Aug 2026 08:22:28 +0000 X-Mizu-Trace-ID: c68b9dbf0f5c289f X-Migadu-Flow: FLOW_OUT Message-ID: <15476f67-1484-4af8-bc5e-ce32fb24607f@linux.dev> Date: Thu, 20 Aug 2026 16:22:19 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [BUG] general protection fault in espintcp_sendmsg To: Jaeyoung Chung Cc: horms@kernel.org, linux-kernel@vger.kernel.org, eulgyukim@snu.ac.kr, davem@davemloft.net, edumazet@google.com, herbert@gondor.apana.org.au, kuba@kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, steffen.klassert@secunet.com, zylzyl2333@gmail.com, sd@queasysnail.net References: <20260819155349.3555804-1-jjy600901@snu.ac.kr> From: Xuanqiang Luo In-Reply-To: <20260819155349.3555804-1-jjy600901@snu.ac.kr> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Jaeyoung, 在 2026/8/19 23:53, Jaeyoung Chung 写道: > Hello, > > We found a "general protection fault in espintcp_sendmsg" on Linux v7.2. > The issue was found by our own race fuzzer. We have not analyzed the root > cause, so we do not have a proposed fix to offer. > > To reproduce the race reliably, we applied the delay patch below to the > kernel and ran the C reproducer as root inside an x86_64 QEMU guest. The > crash log we observed, the delay patch and the reproducer are all included > below. > > The following kernel config options are required to reproduce the issue: > CONFIG_XFRM=y > CONFIG_XFRM_USER=y > CONFIG_INET_ESP=y > CONFIG_INET_ESPINTCP=y > CONFIG_KASAN=y > > We hope this report is useful. Please let us know if any further > information would help. > > Reported-by: Eulgyu Kim > Reported-by: Jaeyoung Chung Thanks for the report. I suspect the issue you reproduced is the same race that Yilin Zhu attempted to address a few months ago: https://lore.kernel.org/all/c30b645074a1b379e0f7fe297f917c66137d9964.1778464688.git.zylzyl2333@gmail.com/ I have added Yilin and Sabrina back to Cc. Sabrina reviewed that patch, but as far as I can tell, no revised version was posted afterwards. I do not know the current status of that work. Thanks, Xuanqiang