diff options
| author | Shiyang Ruan | 2023-03-22 11:11:09 +0000 |
|---|---|---|
| committer | Andrew Morton | 2023-03-28 15:24:32 -0700 |
| commit | 13dd4e04625f600e5affb1b3f0b6c35268ab839b (patch) | |
| tree | 15cb27ec4c1c76c3e3cb832f483d2990a460065e /COPYING | |
| parent | f478b9987cc8236b412d9f2afc958d3e15a7cf85 (diff) | |
fsdax: unshare: zero destination if srcmap is HOLE or UNWRITTEN
unshare copies data from source to destination. But if the source is
HOLE or UNWRITTEN extents, we should zero the destination, otherwise
the HOLE or UNWRITTEN part will be user-visible old data of the new
allocated extent.
Found by running generic/649 while mounting with -o dax=always on pmem.
Link: https://lkml.kernel.org/r/1679483469-2-1-git-send-email-ruansy.fnst@fujitsu.com
Fixes: d984648e428b ("fsdax,xfs: port unshare to fsdax")
Signed-off-by: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions