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block-6.12-20241026

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Merge tag 'block-6.12-20241026' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:

 - Pull request for MD via Song fixing a few issues

 - Fix a wrong check in blk_rq_map_user_bvec(), causing IO errors on
   passthrough IO (Xinyu)

* tag 'block-6.12-20241026' of git://git.kernel.dk/linux:
  block: fix sanity checks in blk_rq_map_user_bvec
  md/raid10: fix null ptr dereference in raid10_size()
  md: ensure child flush IO does not affect origin bio->bi_status
This commit is contained in:
Linus Torvalds 2024-10-27 08:29:36 -10:00
commit 75f8b2f526
3 changed files with 29 additions and 6 deletions
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4
block/blk-map.c
View File

@ -600,9 +600,7 @@ static int blk_rq_map_user_bvec(struct request *rq, const struct iov_iter *iter)
if (nsegs >= nr_segs || bytes > UINT_MAX - bv->bv_len)
goto put_bio;
if (bytes + bv->bv_len > nr_iter)
goto put_bio;
if (bv->bv_offset + bv->bv_len > PAGE_SIZE)
goto put_bio;
break;
nsegs++;
bytes += bv->bv_len;

24
drivers/md/md.c
View File

@ -546,6 +546,26 @@ static int mddev_set_closing_and_sync_blockdev(struct mddev *mddev, int opener_n
return 0;
}
/*
* The only difference from bio_chain_endio() is that the current
* bi_status of bio does not affect the bi_status of parent.
*/
static void md_end_flush(struct bio *bio)
{
struct bio *parent = bio->bi_private;
/*
* If any flush io error before the power failure,
* disk data may be lost.
*/
if (bio->bi_status)
pr_err("md: %pg flush io error %d\n", bio->bi_bdev,
blk_status_to_errno(bio->bi_status));
bio_put(bio);
bio_endio(parent);
}
bool md_flush_request(struct mddev *mddev, struct bio *bio)
{
struct md_rdev *rdev;
@ -565,7 +585,9 @@ bool md_flush_request(struct mddev *mddev, struct bio *bio)
new = bio_alloc_bioset(rdev->bdev, 0,
REQ_OP_WRITE | REQ_PREFLUSH, GFP_NOIO,
&mddev->bio_set);
bio_chain(new, bio);
new->bi_private = bio;
new->bi_end_io = md_end_flush;
bio_inc_remaining(bio);
submit_bio(new);
}

7
drivers/md/raid10.c
View File

@ -4061,9 +4061,12 @@ static int raid10_run(struct mddev *mddev)
}
if (!mddev_is_dm(conf->mddev)) {
ret = raid10_set_queue_limits(mddev);
if (ret)
int err = raid10_set_queue_limits(mddev);
if (err) {
ret = err;
goto out_free_conf;
}
}
/* need to check that every block has at least one working mirror */