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block: Fix bio_copy_data() 

commit 2f6cf0de0281d210061ce976f2d42d246adc75bb upstream.

The memcpy() in bio_copy_data() was using the wrong offset vars, leading
to data corruption in weird unusual setups.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kent Overstreet 2013-09-23 23:17:26 -07:00 committed by Greg Kroah-Hartman
parent 8c15abc94c
commit 9204e9dd40
1 changed files with 2 additions and 2 deletions
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4
fs/bio.c
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@ -917,8 +917,8 @@ void bio_copy_data(struct bio *dst, struct bio *src)
src_p = kmap_atomic(src_bv->bv_page);
dst_p = kmap_atomic(dst_bv->bv_page);
memcpy(dst_p + dst_bv->bv_offset,
src_p + src_bv->bv_offset,
memcpy(dst_p + dst_offset,
src_p + src_offset,
bytes);
kunmap_atomic(dst_p);