From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1E1E41877 for ; Tue, 5 Nov 2024 16:18:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730823484; cv=none; b=NZhBAm9VM7fO/QzGH68xPvKggRX9BzRph/ZBATLOk6mK57VXM5vKkim3cWLGWwWWqvu5c70SgujNgN0sgrmE1pvp2E0kKOsTtSQDChZhJ4pW1tGLyKydY+jXUyWx/PZUS3CHw2edmLrSdI3kKtTuJsyp1vzYE2y2hmSJKyIctUU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730823484; c=relaxed/simple; bh=l6PQAthZRexInRX24ZeFy0PmUd+404i3JJTMBtLrWNQ=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=pjjpAMOt6m7jcje0em85bqqSv2fRcDYvI9ar9sN8sFS4Ej7Y3gqGQ2kucwlyML0nqNySO4SlVkqhEy1yZYGA73csNPyMqtflWOcip0HU/ndpyCvj4b0w9+CfLR9z9Ulsb5mpLw5615Wx0Ify2zUT0IU4J3xpqs99E/yNrH45AfI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wINjFccW; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="wINjFccW" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 976B0C4CECF; Tue, 5 Nov 2024 16:18:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730823484; bh=l6PQAthZRexInRX24ZeFy0PmUd+404i3JJTMBtLrWNQ=; h=Subject:To:Cc:From:Date:From; b=wINjFccWQYTpseFlRyWFIQJfKdP8ZhwJrGpbHOob7BkLANf4OPaG+8CN7xo1Ofq8H /DNJ7E8wNHj+4i1x0ONKAwyLAbA+Zhw8f5Dd5aViFTYHMco3en0J22ZUhqLBZwOPQn OnX3PIWr8VgJj386yvCD+t7uSpQxzgLGwl43VxcI= Subject: FAILED: patch "[PATCH] nilfs2: fix kernel bug due to missing clearing of checked" failed to apply to 4.19-stable tree To: konishi.ryusuke@gmail.com,akpm@linux-foundation.org,stable@vger.kernel.org Cc: From: Date: Tue, 05 Nov 2024 17:17:33 +0100 Message-ID: <2024110533-dexterous-semantic-aa9e@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 41e192ad2779cae0102879612dfe46726e4396aa # git commit -s git send-email --to '' --in-reply-to '2024110533-dexterous-semantic-aa9e@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 41e192ad2779cae0102879612dfe46726e4396aa Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Fri, 18 Oct 2024 04:33:10 +0900 Subject: [PATCH] nilfs2: fix kernel bug due to missing clearing of checked flag Syzbot reported that in directory operations after nilfs2 detects filesystem corruption and degrades to read-only, __block_write_begin_int(), which is called to prepare block writes, may fail the BUG_ON check for accesses exceeding the folio/page size, triggering a kernel bug. This was found to be because the "checked" flag of a page/folio was not cleared when it was discarded by nilfs2's own routine, which causes the sanity check of directory entries to be skipped when the directory page/folio is reloaded. So, fix that. This was necessary when the use of nilfs2's own page discard routine was applied to more than just metadata files. Link: https://lkml.kernel.org/r/20241017193359.5051-1-konishi.ryusuke@gmail.com Fixes: 8c26c4e2694a ("nilfs2: fix issue with flush kernel thread after remount in RO mode because of driver's internal error or metadata corruption") Signed-off-by: Ryusuke Konishi Reported-by: syzbot+d6ca2daf692c7a82f959@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=d6ca2daf692c7a82f959 Cc: Signed-off-by: Andrew Morton diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c index 5436eb0424bd..10def4b55995 100644 --- a/fs/nilfs2/page.c +++ b/fs/nilfs2/page.c @@ -401,6 +401,7 @@ void nilfs_clear_folio_dirty(struct folio *folio) folio_clear_uptodate(folio); folio_clear_mappedtodisk(folio); + folio_clear_checked(folio); head = folio_buffers(folio); if (head) {