4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xiao Ni <xni@xxxxxxxxxx> 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: stable@xxxxxxxxxxxxxxx # v3.16+ Signed-off-by: Xiao Ni <xni@xxxxxxxxxx> Signed-off-by: Song Liu <songliubraving@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/md/raid10.c | 1 - 1 file changed, 1 deletion(-) --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -4692,7 +4692,6 @@ read_more: 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;
