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| author | Xiao Ni <xni@redhat.com> | 2019-03-08 23:52:05 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-23 08:44:32 +0100 |
| commit | b83f73aa760899a492752f8447ec4ef230e5c01d (patch) | |
| tree | 673b2613fd60cf1b8e93fd8c1a653a09bbc1ee96 | |
| parent | 9b37b964775e36ed742e112b7f44a91042c99a63 (diff) | |
| download | linux-stable-b83f73aa760899a492752f8447ec4ef230e5c01d.tar.gz linux-stable-b83f73aa760899a492752f8447ec4ef230e5c01d.tar.bz2 linux-stable-b83f73aa760899a492752f8447ec4ef230e5c01d.zip | |
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.
Cc: stable@vger.kernel.org # v3.16+
Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/raid10.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 8d613652d0e2..98da5f5d847d 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -4442,7 +4442,6 @@ 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; |