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blk-integrity: fix slab-out-of-bounds in t10_pi_verify on namespace revalidation #912

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blk-integrity: fix slab-out-of-bounds in t10_pi_verify on namespace revalidation #912

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12 changes: 12 additions & 0 deletions block/bio-integrity-auto.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,18 @@ static void bio_integrity_verify_fn(struct work_struct *work)
struct bio_integrity_data *bid =
container_of(work, struct bio_integrity_data, work);
struct bio *bio = bid->bio;
struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk);

if (bi) {
unsigned int required = bio_integrity_bytes(bi, bio_sectors(bio));

if (unlikely(required > bid->bip.bip_iter.bi_size)) {
bio->bi_status = BLK_STS_PROTECTION;
bio_integrity_finish(bid);
bio_endio(bio);
return;
}
}

bio->bi_status = bio_integrity_verify(bio, &bid->saved_bio_iter);
bio_integrity_finish(bid);
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