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| author | Ming Lei <ming.lei@canonical.com> | 2016-04-15 18:51:28 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-04-15 08:25:56 -0600 |
| commit | a7297a6a3a3322b054592e8e988981d2f5f29cc4 (patch) | |
| tree | 04064ecd0b492d492617443ebf7c73baa66ec951 /block | |
| parent | a5229050b69cfffb690b546c357ca5a60434c0c8 (diff) | |
| download | linux-a7297a6a3a3322b054592e8e988981d2f5f29cc4.tar.gz linux-a7297a6a3a3322b054592e8e988981d2f5f29cc4.tar.bz2 linux-a7297a6a3a3322b054592e8e988981d2f5f29cc4.zip | |
block: loop: fix filesystem corruption in case of aio/dio
Starting from commit e36f620428(block: split bios to max possible length),
block core starts to split bio in the middle of bvec.
Unfortunately loop dio/aio doesn't consider this situation, and
always treat 'iter.iov_offset' as zero. Then filesystem corruption
is observed.
This patch figures out the offset of the base bvevc via
'bio->bi_iter.bi_bvec_done' and fixes the issue by passing the offset
to iov iterator.
Fixes: e36f6204288088f (block: split bios to max possible length)
Cc: Keith Busch <keith.busch@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org (4.5)
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions