A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 02:32:09 -04:00
Code Issues Projects Releases Packages Wiki Activity

bio: ensure __bio_clone_fast copies bi_partno

Browse source 
A new field was introduced in 74d46992e0, bi_partno, instead of using
bdev->bd_contains and encoding the partition information in the bi_bdev
field.  __bio_clone_fast was changed to copy the disk information, but
not the partition information.  At minimum, this regressed bcache and
caused data corruption.

Signed-off-by: Michael Lyle <[email protected]>
Fixes: 74d46992e0 ("block: replace bi_bdev with a gendisk pointer and partitions index")
Reported-by: Pavel Goran <[email protected]>
Reported-by: Campbell Steven <[email protected]>
Reviewed-by: Coly Li <[email protected]>
Reviewed-by: Ming Lei <[email protected]>
Cc: <[email protected]> # 4.14
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Michael Lyle 2017-11-16 23:47:25 -08:00 • committed by Jens Axboe
commit 62530ed8b1
1 changed files with 1 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
block/bio.c
View file

@ -597,6 +597,7 @@ void __bio_clone_fast(struct bio *bio, struct bio *bio_src)
* so we don't set nor calculate new physical/hw segment counts here
*/
bio->bi_disk = bio_src->bi_disk;
bio->bi_partno = bio_src->bi_partno;
bio_set_flag(bio, BIO_CLONED);
bio->bi_opf = bio_src->bi_opf;
bio->bi_write_hint = bio_src->bi_write_hint;