4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xiao Ni <x...@redhat.com>
commit b761dcf1217760a42f7897c31dcb649f59b2333e upstream.
In reshape_request it already adds len to sector_nr already. It's wrong to add
len to
sector_nr again after adding pages to bio. If there is bad block it can't copy
one chunk
at a time, it needs to goto read_more. Now the sector_nr is wrong. It can cause
data
corruption.
Cc: sta...@vger.kernel.org # v3.16+
Signed-off-by: Xiao Ni <x...@redhat.com>
Signed-off-by: Song Liu <songliubrav...@fb.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/md/raid10.c | 1 -
1 file changed, 1 deletion(-)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4489,7 +4489,6 @@ bio_full:
atomic_inc(&r10_bio->remaining);
read_bio->bi_next = NULL;
generic_make_request(read_bio);
- sector_nr += nr_sectors;
sectors_done += nr_sectors;
if (sector_nr <= last)
goto read_more;
