[PATCH v3 3/6] block: Handle bio_split() errors in bio_submit_split()
From: John Garry
Date: Thu Oct 31 2024 - 06:00:42 EST
bio_split() may error, so check this.
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Signed-off-by: John Garry <john.g.garry@xxxxxxxxxx>
---
block/blk-merge.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/block/blk-merge.c b/block/blk-merge.c
index a16abf7b65dc..4d7b6bc8814c 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -107,11 +107,8 @@ static unsigned int bio_allowed_max_sectors(const struct queue_limits *lim)
static struct bio *bio_submit_split(struct bio *bio, int split_sectors)
{
- if (unlikely(split_sectors < 0)) {
- bio->bi_status = errno_to_blk_status(split_sectors);
- bio_endio(bio);
- return NULL;
- }
+ if (unlikely(split_sectors < 0))
+ goto error;
if (unlikely((bio_op(bio) == REQ_OP_DISCARD)))
@@ -123,6 +120,10 @@ static struct bio *bio_submit_split(struct bio *bio, int split_sectors)
split = bio_split(bio, split_sectors, GFP_NOIO,
&bio->bi_bdev->bd_disk->bio_split);
+ if (IS_ERR(split)) {
+ split_sectors = PTR_ERR(split);
+ goto error;
+ }
split->bi_opf |= REQ_NOMERGE;
blkcg_bio_issue_init(split);
bio_chain(split, bio);
@@ -133,6 +134,10 @@ static struct bio *bio_submit_split(struct bio *bio, int split_sectors)
}
return bio;
+error:
+ bio->bi_status = errno_to_blk_status(split_sectors);
+ bio_endio(bio);
+ return NULL;
}
struct bio *bio_split_discard(struct bio *bio, const struct queue_limits *lim,
--
2.31.1