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Date: Fri, 29 Nov 2019 17:35:53 +0100 (CET) From: Richard Weinberger <richard@....at> To: Andreas Gruenbacher <agruenba@...hat.com> Cc: Christoph Hellwig <hch@...radead.org>, Darrick <darrick.wong@...cle.com>, torvalds <torvalds@...ux-foundation.org>, linux-kernel <linux-kernel@...r.kernel.org>, Al Viro <viro@...iv.linux.org.uk>, Jeff Layton <jlayton@...nel.org>, Sage Weil <sage@...hat.com>, Ilya Dryomov <idryomov@...il.com>, tytso <tytso@....edu>, Andreas Dilger <adilger.kernel@...ger.ca>, Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>, linux-xfs@...r.kernel.org, linux-fsdevel <linux-fsdevel@...r.kernel.org>, Artem Bityutskiy <dedekind1@...il.com>, Adrian Hunter <adrian.hunter@...el.com>, ceph-devel@...r.kernel.org, linux-ext4@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-mtd <linux-mtd@...ts.infradead.org>, Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>, linux-btrfs <linux-btrfs@...r.kernel.org> Subject: Re: [PATCH v2] fs: Fix page_mkwrite off-by-one errors ----- Ursprüngliche Mail ----- > Von: "Andreas Gruenbacher" <agruenba@...hat.com> > An: "Christoph Hellwig" <hch@...radead.org>, "Darrick" <darrick.wong@...cle.com> > CC: "Andreas Gruenbacher" <agruenba@...hat.com>, "torvalds" <torvalds@...ux-foundation.org>, "linux-kernel" > <linux-kernel@...r.kernel.org>, "Al Viro" <viro@...iv.linux.org.uk>, "Jeff Layton" <jlayton@...nel.org>, "Sage Weil" > <sage@...hat.com>, "Ilya Dryomov" <idryomov@...il.com>, "tytso" <tytso@....edu>, "Andreas Dilger" > <adilger.kernel@...ger.ca>, "Jaegeuk Kim" <jaegeuk@...nel.org>, "Chao Yu" <chao@...nel.org>, linux-xfs@...r.kernel.org, > "linux-fsdevel" <linux-fsdevel@...r.kernel.org>, "richard" <richard@....at>, "Artem Bityutskiy" <dedekind1@...il.com>, > "Adrian Hunter" <adrian.hunter@...el.com>, ceph-devel@...r.kernel.org, linux-ext4@...r.kernel.org, > linux-f2fs-devel@...ts.sourceforge.net, "linux-mtd" <linux-mtd@...ts.infradead.org>, "Chris Mason" <clm@...com>, "Josef > Bacik" <josef@...icpanda.com>, "David Sterba" <dsterba@...e.com>, "linux-btrfs" <linux-btrfs@...r.kernel.org> > Gesendet: Freitag, 29. November 2019 15:20:45 > Betreff: [PATCH v2] fs: Fix page_mkwrite off-by-one errors > The check in block_page_mkwrite meant to determine whether an offset is > within the inode size is off by one. This bug has spread to > iomap_page_mkwrite and to several filesystems (ubifs, ext4, f2fs, ceph). > To fix that, introduce a new page_mkwrite_check_truncate helper that > checks for truncate and computes the bytes in the page up to EOF, and > use that helper in the above mentioned filesystems and in btrfs. > > Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com> Thank you for fixing UBIFS! Acked-by: Richard Weinberger <richard@....at> Thanks, //richard
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