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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2005-10-03 15:15:36 +1000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2005-10-30 11:19:43 +1100 |
| commit | 1b40efd772f4419fbc1a8940506424246985c333 (patch) | |
| tree | 0f1ade69806e7f02196534b008ef8d2c925bf34b /crypto | |
| parent | 6df5b9f48dd0e77fa796b9b7d3fde7cc5f1237f2 (diff) | |
| download | lwn-1b40efd772f4419fbc1a8940506424246985c333.tar.gz lwn-1b40efd772f4419fbc1a8940506424246985c333.zip | |
[CRYPTO] Check cra_alignmask against cra_blocksize
The cipher code relies on the fact that the block size is a multiple
of the required alignment. So we should check this at the time of
algorith registration. We also ensure that the block size is bounded
by the page size.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/api.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/crypto/api.c b/crypto/api.c index 959c4e5f264f..40ae42e9b6a6 100644 --- a/crypto/api.c +++ b/crypto/api.c @@ -215,7 +215,10 @@ int crypto_register_alg(struct crypto_alg *alg) if (alg->cra_alignmask & (alg->cra_alignmask + 1)) return -EINVAL; - if (alg->cra_alignmask > PAGE_SIZE) + if (alg->cra_alignmask & alg->cra_blocksize) + return -EINVAL; + + if (alg->cra_blocksize > PAGE_SIZE) return -EINVAL; down_write(&crypto_alg_sem); |