diff options
| author | Kent Overstreet <koverstreet@google.com> | 2012-10-12 22:18:27 +0200 |
|---|---|---|
| committer | Kent Overstreet <koverstreet@google.com> | 2013-03-23 22:15:26 +0100 |
| commit | 6fda981cafbf908acd11e1e636fec50e99d56a47 (patch) | |
| tree | be6c8b95551a6081745ab937241dc4a3ef348676 /fs/bio-integrity.c | |
| parent | block: Avoid deadlocks with bio allocation by stacking drivers (diff) | |
| download | linux-6fda981cafbf908acd11e1e636fec50e99d56a47.tar.xz linux-6fda981cafbf908acd11e1e636fec50e99d56a47.zip | |
block: Fix a buffer overrun in bio_integrity_split()
bio_integrity_split() seemed to be confusing pointers and arrays -
bip_vec in bio_integrity_payload was an array appended to the end of the
payload, so the bio_vecs in struct bio_pair should have come after the
bio_integrity_payload they're for.
Fix it by making bip_vec a pointer to the inline vecs - a later patch is
going to make more use of this pointer.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'fs/bio-integrity.c')
| -rw-r--r-- | fs/bio-integrity.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c index a3f28f331b2b..94fa1c562c0e 100644 --- a/fs/bio-integrity.c +++ b/fs/bio-integrity.c @@ -112,6 +112,7 @@ struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, bip->bip_slab = idx; bip->bip_bio = bio; + bip->bip_vec = bip->bip_inline_vecs; bio->bi_integrity = bip; return bip; @@ -697,8 +698,8 @@ void bio_integrity_split(struct bio *bio, struct bio_pair *bp, int sectors) bp->iv1 = bip->bip_vec[0]; bp->iv2 = bip->bip_vec[0]; - bp->bip1.bip_vec[0] = bp->iv1; - bp->bip2.bip_vec[0] = bp->iv2; + bp->bip1.bip_vec = &bp->iv1; + bp->bip2.bip_vec = &bp->iv2; bp->iv1.bv_len = sectors * bi->tuple_size; bp->iv2.bv_offset += sectors * bi->tuple_size; |