Commit f735b5ee authored by Jens Axboe's avatar Jens Axboe

bounce: don't rely on a zeroed bio_vec list

__blk_queue_bounce() relies on a zeroed bio_vec list, since it looks
up arbitrary indexes in the allocated bio. The block layer only
guarentees that added entries are valid, so clear memory after alloc.
Signed-off-by: default avatarJens Axboe <>
parent a0ea8622
......@@ -198,8 +198,13 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
* irk, bounce it
if (!bio)
bio = bio_alloc(GFP_NOIO, (*bio_orig)->bi_vcnt);
if (!bio) {
unsigned int cnt = (*bio_orig)->bi_vcnt;
bio = bio_alloc(GFP_NOIO, cnt);
memset(bio->bi_io_vec, 0, cnt * sizeof(struct bio_vec));
to = bio->bi_io_vec + i;
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