[PATCH v2 03/10] block: copy bip_max_vcnt vecs instead of bip_vcnt during clone

[Anuj Gupta]

If bio_integrity_copy_user is used to process the meta buffer, bip_max_vcnt
is one greater than bip_vcnt. In this case bip_max_vcnt vecs needs to be
copied to cloned bip.

Signed-off-by: Anuj Gupta <anuj20.g at samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k at samsung.com>
---
 block/bio-integrity.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/bio-integrity.c b/block/bio-integrity.c
index af79d9fbf413..5e7596b74ef1 100644
--- a/block/bio-integrity.c
+++ b/block/bio-integrity.c
@@ -647,12 +647,12 @@ int bio_integrity_clone(struct bio *bio, struct bio *bio_src,
 
 	BUG_ON(bip_src == NULL);
 
-	bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_vcnt);
+	bip = bio_integrity_alloc(bio, gfp_mask, bip_src->bip_max_vcnt);
 	if (IS_ERR(bip))
 		return PTR_ERR(bip);
 
 	memcpy(bip->bip_vec, bip_src->bip_vec,
-	       bip_src->bip_vcnt * sizeof(struct bio_vec));
+	       bip_src->bip_max_vcnt * sizeof(struct bio_vec));
 
 	bip->bip_vcnt = bip_src->bip_vcnt;
 	bip->bip_iter = bip_src->bip_iter;
-- 
2.25.1