Commit 7302533a authored by Herbert Xu's avatar Herbert Xu Committed by David S. Miller

[CRYPTO] api: Require block size to be less than PAGE_SIZE/8

The cipher code path may allocate up to two blocks of data on the stack.
Therefore we need to place limits on the maximum block size.
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent bcb0ad2b
...@@ -251,7 +251,7 @@ int crypto_register_alg(struct crypto_alg *alg) ...@@ -251,7 +251,7 @@ int crypto_register_alg(struct crypto_alg *alg)
if (alg->cra_alignmask & alg->cra_blocksize) if (alg->cra_alignmask & alg->cra_blocksize)
return -EINVAL; return -EINVAL;
if (alg->cra_blocksize > PAGE_SIZE) if (alg->cra_blocksize > PAGE_SIZE / 8)
return -EINVAL; return -EINVAL;
if (alg->cra_priority < 0) if (alg->cra_priority < 0)
......
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