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charset="utf-8" bio_split() may error, so check this. Reviewed-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Signed-off-by: John Garry Reviewed-by: Hannes Reinecke --- 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 stru= ct queue_limits *lim) =20 static struct bio *bio_submit_split(struct bio *bio, int split_sectors) { - if (unlikely(split_sectors < 0)) { - bio->bi_status =3D errno_to_blk_status(split_sectors); - bio_endio(bio); - return NULL; - } + if (unlikely(split_sectors < 0)) + goto error; =20 =20 if (unlikely((bio_op(bio) =3D=3D REQ_OP_DISCARD))) @@ -123,6 +120,10 @@ static struct bio *bio_submit_split(struct bio *bio, i= nt split_sectors) =20 split =3D bio_split(bio, split_sectors, GFP_NOIO, &bio->bi_bdev->bd_disk->bio_split); + if (IS_ERR(split)) { + split_sectors =3D PTR_ERR(split); + goto error; + } split->bi_opf |=3D REQ_NOMERGE; blkcg_bio_issue_init(split); bio_chain(split, bio); @@ -133,6 +134,10 @@ static struct bio *bio_submit_split(struct bio *bio, i= nt split_sectors) } =20 return bio; +error: + bio->bi_status =3D errno_to_blk_status(split_sectors); + bio_endio(bio); + return NULL; } =20 struct bio *bio_split_discard(struct bio *bio, const struct queue_limits *= lim, --=20 2.31.1