From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out203-205-251-72.mail.qq.com (out203-205-251-72.mail.qq.com [203.205.251.72]) (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 E4F3D28DDF for ; Tue, 30 Apr 2024 09:31:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.205.251.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714469519; cv=none; b=dVHnzy3ZS2J/bf0WO3I7SgfKY4T3mK7yNYbmRu1f8HwYS9UJcxgo/XVmuzBOcGGkkVxF3YW1QzIVZ/Cq3YGmRqGjsh8Gn7G78r5EyyZQ/U+JcQCe/DoqQhiuUiK43g6HAYFysb0vXSlVGgtoDlLZHX8R9GOZjUkpQkTJAesxcIA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714469519; c=relaxed/simple; bh=GyrnoGgCwPvSi7f0bGGT8Rkatbx9R1Lw+jk2EHRtaXk=; h=Message-ID:From:To:Cc:Subject:Date:In-Reply-To:References: MIME-Version; b=tn5mAiHYZVnpLBpHOYqifgOKgOQunHkWgkVMJ0RlIA18eRG4FbQ3H4EtL9QftgpN3fXpRRGyxaZx0uVJzy4vUM5yK6fgBBbp3pLN7AoQWET0khzcveSzksqntVkgpIWUkOAkytjTEIoHNEapO4TIevRKaGq2Py29vKznhJQxxmc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com; spf=pass smtp.mailfrom=qq.com; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b=IP5HH1i+; arc=none smtp.client-ip=203.205.251.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="IP5HH1i+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1714469509; bh=HLV0QD/9WTdmLS6RCyWcgbzB9VHBZ4GBfqebvLw9pxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=IP5HH1i+aHmDhnGYoA3kECb5Zt79YVeLmMZwy/PUzBQQm48/Qgf3Pb5NyzOcrmVgn FUIKyk8nfqXS6+APN1e80RJ7aWvTPza/SGyXLD+F/6vD9D9ggqt7D4e/+1ky2lrKY4 7BR9MXfAAzYEysYRLV00cgF58491jpMBqNXg9Q4Y= Received: from pek-lxu-l1.wrs.com ([111.198.228.153]) by newxmesmtplogicsvrszc5-2.qq.com (NewEsmtp) with SMTP id 7EF29854; Tue, 30 Apr 2024 17:31:47 +0800 X-QQ-mid: xmsmtpt1714469507t94g3cd0w Message-ID: X-QQ-XMAILINFO: N+bThp2B+LIxQ3WebrxRv9uyBrNb1R/uJqRNy/xC9KgJ24jrMuaSUEE1vzWqTF /W22NtAswJo6LcbthliuhkaAhYyBF59tFA08xRejB+09ghOvDcE7q2ew6LCSL9iN05+TouhD3jA6 4a9Q4L3zXWSvUPigKxJ7qbpTxTKa35+CljNl2AQwOlYvfA//q+9qj+w44sx3fbD7V+Iy8juXXtt/ DkFvhJQJTN+mNd5BFF0UT260ZrT3k7q56UbPAMMpBj+/ZmdN71STqGp31bUYbkO2gWe8ptISIwQV razorMFiNSokKdI/0VqlHLCgSQKGw9sXt1gxQG/QBSTAihJprOHfIFhJW49ZhOtj26gb3afct3TM MRk4IAujVYg24PdK18wY9VZZwouckB5AlNffGJizt2n5ew1FCapI8afmGLnOnxhZF29JuwburNwF s36H2rWvSh+aT2rVfn2Gr6eQKj0BhYSbFEio/iLTFIbUzJ33vqeH9ldzJCpeRZcMYb1zNMsByTaD xX5ezAu/Y1l0zD/nTINEl1zxBtPr3Z9wuWof9oZigXPUIEQ1ffisOPG+TnM07/fsT1Juo4rpUmm6 Heyu5NZIFD+btdkYRErHqVuBnql2fzTMeU9AW2s46P8xoG0o5j0Ly3U7pqQE3CNWLWq//UEVi0YR k1zswyePG9VcaHnv/XyXN2Dro1vjLaekANsH0ugyTIalDTqIhIZdHfvIzQv8ElvxKpLYlMTAe/GX 8eISl8cZKkCxwoFTjUTjLiNFpEqOZ9B8LRFK3ERT7Itp7RazhDRG0KgP3MA30Kk4iV8IEkF8zNPi YBBuiOOBg929Z+lzJhL80gl8Q134bWcqo8T3ZgZ/mqq6vkJrmQulLnrduOyn0U1k8QeBq+UB8JL4 GogLuXGC0zaKwJkKrbYdn1h2x1Ptm6JEwVrHxk0d7N7QrF/QjgS6krBIT9QhCoXQ+dCItD/Z9eZD mpbd+UcBI= X-QQ-XMRINFO: OD9hHCdaPRBwq3WW+NvGbIU= From: Edward Adam Davis To: syzbot+98edc2df894917b3431f@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net?] [virt?] [kvm?] KASAN: slab-use-after-free Read in vhost_task_fn Date: Tue, 30 Apr 2024 17:31:47 +0800 X-OQ-MSGID: <20240430093146.810849-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <000000000000a9613006174c1c4c@google.com> References: <000000000000a9613006174c1c4c@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test uaf in vhost_task_fn #syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git bb7a2467e6be diff --git a/kernel/vhost_task.c b/kernel/vhost_task.c index 48c289947b99..8800f5acc007 100644 --- a/kernel/vhost_task.c +++ b/kernel/vhost_task.c @@ -61,8 +61,8 @@ static int vhost_task_fn(void *data) set_bit(VHOST_TASK_FLAGS_KILLED, &vtsk->flags); vtsk->handle_sigkill(vtsk->data); } - complete(&vtsk->exited); mutex_unlock(&vtsk->exit_mutex); + complete(&vtsk->exited); do_exit(0); }