Christoph Hellwig 95848dcb9d zram: take device and not only bvec offset into account ... Commit af8b04c637 ("zram: simplify bvec iteration in __zram_make_request") changed the bio iteration in zram to rely on the implicit capping to page boundaries in bio_for_each_segment. But it failed to care for the fact zram not only care about the page alignment of the bio payload, but also the page alignment into the device. For buffered I/O and swap those are the same, but for direct I/O or kernel internal I/O like XFS log buffer writes they can differ. Fix this by open coding bio_for_each_segment and limiting the bvec len so that it never crosses over a page alignment boundary in the device in addition to the payload boundary already taken care of by bio_iter_iovec. Cc: stable@vger.kernel.org Fixes: af8b04c637 ("zram: simplify bvec iteration in __zram_make_request") Reported-by: Dusty Mabe <dusty@dustymabe.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Sergey Senozhatsky <senozhatsky@chromium.org> Link: https://lore.kernel.org/r/20230805055537.147835-1-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>		2023-08-05 16:13:15 -06:00
..
Kconfig	zram: introduce recompress sysfs knob	2022-11-30 15:58:51 -08:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
zcomp.c	zram: preparation for multi-zcomp support	2022-11-30 15:58:51 -08:00
zcomp.h	zram: preparation for multi-zcomp support	2022-11-30 15:58:51 -08:00
zram_drv.c	zram: take device and not only bvec offset into account	2023-08-05 16:13:15 -06:00
zram_drv.h	zram: remove valid_io_request	2023-04-18 16:29:56 -07:00