From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from submarine.notk.org (submarine.notk.org [62.210.214.84]) (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 081BB391822 for ; Sun, 13 Sep 2026 08:44:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.210.214.84 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789289098; cv=none; b=EMS7a+asBETE9RbRWWh9h/vCKLueBsW8SKaU+jlRMxweMWJrCVEYH9vnUetTT05yJhIPjJ35Y/kVqeGES/kcGE8EYZ1GuioODfEBI01w8Cw3StLOMsbPDx9AO3lYozFZ0M1Ti6cYYUjimbYtstTXQEnRgEvbFaDSgZIvQQ0EMnA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789289098; c=relaxed/simple; bh=8m0PPlyNNCSEtp7TRfILqQQEhHq6E+jzOoqCB2lsZoU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mKi2QsLRciSWekyWa/FX7YPq5noutsdeqiVjHfMB+rcoR/VF6oSYnAJshrygoRLLea1VkPaZ8Eel0Uhv6hf/+n8dqlVfiC7Mkqn1JdwBke79AhOMOcP+PyMJ9NkPXUaA532j0ltjfS+6jwwtVhObAjTutrE+TjQQWfJiv0Szn8s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codewreck.org; spf=pass smtp.mailfrom=codewreck.org; dkim=pass (2048-bit key) header.d=codewreck.org header.i=@codewreck.org header.b=JTRDLSLF; arc=none smtp.client-ip=62.210.214.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codewreck.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=codewreck.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=codewreck.org header.i=@codewreck.org header.b="JTRDLSLF" Received: from gaia.codewreck.org (localhost [127.0.0.1]) by submarine.notk.org (Postfix) with ESMTPS id AA92F14C2D6; Sun, 13 Sep 2026 10:44:51 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codewreck.org; s=2; t=1789289095; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=DuX0dyVxOsJkrFTZmTmdfvbvbh0Mi2dz3PNH36mjDyk=; b=JTRDLSLFywKYdpWPG2scTup0cA5vWC7aGYr/VfZ7fslOwzKmM8FQDWgjZ/kTKr5GpzS9kx awSXmGJXQakSLxj48Z0XpPTPNYA5urh2oaLx5EyTi38bN8qHHVKqAImInG/gR5AWroxRJz 1BaqVshBwsOTv1R0oPOYKoDYtfhog2BWN3qrUltXEvk1h+auDHdWmCBxUkJWTeW4yOnwxa 4p0S/4i4bcR4KMYNqZS3YOvwgD4246fu/OPE9bsaKCv3r3apXFdDrA5hWtaaKV7SfyvkOE QtNAjvDR3qmm8HH6DntI5Gq2o/2qVU+xQvL6TphVWHX6duUYet4Xe3qny6w3Mw== Received: from localhost (gaia.codewreck.org [local]) by gaia.codewreck.org (OpenSMTPD) with ESMTPA id 26127b29; Sun, 13 Sep 2026 08:44:49 +0000 (UTC) Date: Sun, 13 Sep 2026 17:44:34 +0900 From: Dominique Martinet To: Michael Grzeschik Cc: v9fs@lists.linux.dev, Eric Van Hensbergen , Latchesar Ionkov , Christian Schoenebeck , linux-kernel@vger.kernel.org, Yuxiang Yang , Ao Wang , Xuewei Feng , Qi Li , Ke Xu , Yizhou Zhao Subject: Re: [PATCH] net/9p/usbg: Fix use-after-free on usb9pfs_clear_tx Message-ID: References: <20260529081026.77732-1-zhaoyz24@mails.tsinghua.edu.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20260529081026.77732-1-zhaoyz24@mails.tsinghua.edu.cn> Hi Michael, I'm honestly not quite sure what to do with this and others UAF usb9pfs patches -- you acked the first one I replied to, and the tag match is obviously correct so I picked these two, but I'd like your opinion on the rest for two reasons: - There seem to be plenty of rough edges around usb9pfs, and frankly I don't consider this a trust boundary (the usecase being developping embedded devices, you trust the server fully, so whatever happens in corner cases doesn't matter) - You had a rework in progress (before leaving Pengutronix, which I can totally understand you don't have time or want to keep carrying going forward, but is someone else from Pengutronix taking your place?) For all I know this is also correct, but I'm not sure slapping a bandaid is the way to go, so I'd really appreciate if you could have a look at this[1] and "net/9p/usbg: clear stale request context after abort"[2] [1] https://lore.kernel.org/r/20260529081026.77732-1-zhaoyz24@mails.tsinghua.edu.cn [2] https://lore.kernel.org/r/20260802152148.810390-1-marsy12010123@gmail.com If you tell me to pick them up I will, and if I don't hear back from you I'll take another look hopefully before the 7.4 deadline, but I honestly don't have enough time for this so the most likely outcome will be /dev/null Thanks (and sorry Yizhou Zhao / Chengfeng Ye) -- Dominique