From 6831d2d4366d13fd48ff70a3a96016d2b294783f Mon Sep 17 00:00:00 2001 From: Xiao Ni Date: Fri, 8 Mar 2019 23:52:05 +0800 Subject: [PATCH] It's wrong to add len to sector_nr in raid10 reshape twice 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. Signed-off-by: Xiao Ni Signed-off-by: Song Liu Signed-off-by: Ben Hutchings --- drivers/md/raid10.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 18b0c80fc4471..715dd5eed08c9 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -4506,7 +4506,6 @@ 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; -- 2.47.2