From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 046C8281369; Mon, 6 Apr 2026 05:39:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775453950; cv=none; b=jYugkgY2rgW/qLY+pCUQHn1ATRTGjWgrUpjH0zbvvo3HW/ql9q/ckzm64oZcir3a7y9QM3NhGIHUBIe5BDhSGCZsB1TiNKU6BFvbXO8lsgHtFN+KPDoOzzPY+MEon47G+7NMqoI8bm9U7wmyFH3Wdz1WHg/jikIy/1GztFZSb/I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775453950; c=relaxed/simple; bh=vQgOMnCWvS/TmXpFQzFSDCXZDKI+MgWQcj9wabYm8Ao=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=expKN/fnEmw6pGMKRGv0hNSARoWAMpoGkR/Y+enlap9iSC++yzPMhrT6zi5PUlFeBLYy5dUmZbW81RsvCxFv6cBsNaPl/zNfjuGOn5WEyRckmDi+xun0+S8fFVCeWsxRPRT/GnNZKRIcg/1OreSlUNfB2M6URYO45Tw56hFL3XE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=t0MA7AUX; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="t0MA7AUX" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=vQgOMnCWvS/TmXpFQzFSDCXZDKI+MgWQcj9wabYm8Ao=; b=t0MA7AUXzXveOky7wyiBycWfNA v4S9cB3YrnJCTE/1Im/7Qa8emSSig5GpsYX6riRMEOGScBDAYn5oKLaKd7vW94Cu3JHEMV+O8vAgY /aKKR/EA4tPFMRP1nQ9lQixyIkEYa3ilnD77lGetM6ZjOIzarlD0PLUg6E9upnLgBNW55h99VJwd/ AP8m0QmvU5N9ZnDsmddcfUQD7nFhzUBXdHHxVFV/dj/hBANQFdF7h5Ixqk03pLWKaQIgi/AE5fZbD eLTyBMIts997Zlq05RVcIOIZ4V1V7rxaSAT7P5ZyFvUriVjzdhEOTB/KshYX1Wh29ry5qIJG0lBQ9 dxjqO9ZA==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1w9cfy-00000004obI-1U7Y; Mon, 06 Apr 2026 05:39:06 +0000 Date: Sun, 5 Apr 2026 22:39:06 -0700 From: Christoph Hellwig To: Sungwoo Kim Cc: Christoph Hellwig , Jens Axboe , Keith Busch , Chao Shi , Weidong Zhu , Dave Tian , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] block: Fix general protection fault in bio_integrity_map_user() Message-ID: References: <20260330230256.4160820-2-iam@sung-woo.kim> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Fri, Apr 03, 2026 at 03:03:00AM +0900, Sungwoo Kim wrote: > Thank you for letting me know about blktests. I'm learning this and > finding a way to reproduce this bug. > If blktests is not suitable for reproducing this - it might be too > early to think about this though - I have another idea to reproduce > this. > I can modify the pin_user_pages_fast() source to make it always > partial success, so there are always some unpinned pages, which is a > precondition of this bug. > I'd like to ask for comments on this if it doesn't make sense. Using the failure injection framework to reproduce this sounds like a good idea.