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Commit 2f6cf0de authored by Kent Overstreet's avatar Kent Overstreet Committed by Linus Torvalds
Browse files

block: Fix bio_copy_data() 



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

Signed-off-by: default avatarKent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.9
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4a10c2ac

fs/bio.c

+2 −2
Original line number Diff line number Diff line
@@ -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);