[linux-lvm] Function clone_bio
sumnaray at gmail.com
Wed Nov 28 15:25:57 UTC 2007
static struct bio *clone_bio(struct bio *bio, sector_t sector,
unsigned short idx, unsigned short bv_count,
unsigned int len, struct bio_set *bs)
struct bio *clone;
clone = bio_alloc_bioset(GFP_NOIO, bio->bi_max_vecs, bs);
clone->bi_destructor = dm_bio_destructor;
clone->bi_sector = sector;
clone->bi_idx = idx;
clone->bi_vcnt = idx + bv_count;
clone->bi_size = to_bytes(len);
clone->bi_flags &= ~(1 << BIO_SEG_VALID);
There is a possibility of NULL being returned from bio_alloc_bioset.
Although unlikely, it could crash the kernel.
If required, I have attached a patch (created on linux-22.214.171.124).
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