nvmet: fix memory leak of bio integrity

If nvmet receives commands with metadata there is a continuous memory
leak of kmalloc-128 slab or more precisely bio->bi_integrity.

Since commit bf4c89f ("block: don't call bio_uninit from bio_endio")
each user of bio_init has to use bio_uninit as well. Otherwise the bio
integrity is not getting free. Nvmet uses bio_init for inline bios.

Uninit the inline bio to complete deallocation of integrity in bio.

Fixes: bf4c89f ("block: don't call bio_uninit from bio_endio")
Signed-off-by: Dmitry Bogdanov <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>

Author: logost

drivers/nvme/target/nvmet.h

@@ -867,6 +867,8 @@ static inline void nvmet_req_bio_put(struct nvmet_req *req, struct bio *bio)
 {
 	if (bio != &req->b.inline_bio)
 		bio_put(bio);
+	else
+		bio_uninit(bio);
 }
 
 #ifdef CONFIG_NVME_TARGET_TCP_TLS