From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33428C433EF for ; Fri, 22 Apr 2022 19:45:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 726876B0073; Fri, 22 Apr 2022 15:45:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6D5356B0074; Fri, 22 Apr 2022 15:45:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5C3876B0075; Fri, 22 Apr 2022 15:45:41 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (relay.a.hostedemail.com [64.99.140.24]) by kanga.kvack.org (Postfix) with ESMTP id 4E6FC6B0073 for ; Fri, 22 Apr 2022 15:45:41 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 1242B24ED0 for ; Fri, 22 Apr 2022 19:45:41 +0000 (UTC) X-FDA: 79385544882.18.EBB5517 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf11.hostedemail.com (Postfix) with ESMTP id EB09C40033 for ; Fri, 22 Apr 2022 19:45:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:Message-ID: Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID: Content-Description:In-Reply-To:References; bh=xXTvDwOshNmT8k01EPNDMJ5Vw4kyttJnV4C5HkjVHmo=; b=lCmZiJ8f6r3JpHX3G3metcapt8 xV/Jn2baI6NQYvOMdGiNgfDE6/xKNgCmL8vwrKdToESpCiIN+gsKnLE5j2RGxM/BQFTKT62V3nFNf mPEPSroSRU1lDTsbdNyblCuqxC+3zilX9wO8dUnOJ43e0lJcEm1jDfZ1XCjYWK1YmqK/O2DjeiB1F 4Tmn+LR6z0JzsxcQCneFR8nbvo6y6Qs/IuRa3YZUOSm1uETCaqkP4BHbUBiodTiXb+0SBO02zCTvo t4GCrb8YCdrXSpW0/5wr3ATe8ttg7m4XNetMC9fq7qLv+CF+dCAuUVORKWHoiZdD+UqmQcMljJ6dF 0c8w/GkA==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nhzDj-006MHK-On; Fri, 22 Apr 2022 19:45:35 +0000 Date: Fri, 22 Apr 2022 20:45:35 +0100 From: Matthew Wilcox To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [GIT PULL] Rare page cache data corruption fix Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=lCmZiJ8f; dmarc=none; spf=none (imf11.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: EB09C40033 X-Rspam-User: X-Stat-Signature: ca75eqqfs1diy98simi17oissyn71f6c X-HE-Tag: 1650656737-189233 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Syzbot found a nasty race between large page splitting and page lookup. Details in the commit log, but fortunately it has a reliable reproducer. I thought it better to send this one to you straight away. The other commit fixes the test suite build, again. The following changes since commit 281b9d9a4b02229b602a14f7540206b0fbe4134f: Merge branch 'akpm' (patches from Andrew) (2022-04-22 10:10:43 -0700) are available in the Git repository at: git://git.infradead.org/users/willy/xarray.git tags/xarray-5.18a for you to fetch changes up to 63b1898fffcd8bd81905b95104ecc52b45a97e21: XArray: Disallow sibling entries of nodes (2022-04-22 15:35:40 -0400) ---------------------------------------------------------------- XArray: Two fixes for 5.18 - Fix the test suite build for kmem_cache_alloc_lru() - Fix a rare race between split and load ---------------------------------------------------------------- Matthew Wilcox (Oracle) (2): tools: Add kmem_cache_alloc_lru() XArray: Disallow sibling entries of nodes lib/xarray.c | 2 ++ tools/include/linux/slab.h | 8 +++++++- tools/testing/radix-tree/linux.c | 3 ++- 3 files changed, 11 insertions(+), 2 deletions(-)