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crypto: qat - add check for negative offset in alg precompute function

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The offset is calculated based on type of hash algorithum.
If the algorithum is invalid the offset can have negative value.
Hence added negative offset check and return -EFAULT.

Reviewed-by: Conor Mcloughlin <conor.mcloughlin@intel.com>
Tested-by: Sergey Portnoy <sergey.portnoy@intel.com>
Signed-off-by: Shant KumarX Sonnad <shant.kumarx.sonnad@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Shant KumarX Sonnad 2019-04-29 16:43:16 +01:00 committed by Herbert Xu
parent 933224985a
commit c044b62c36
1 changed files with 3 additions and 0 deletions
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3
drivers/crypto/qat/qat_common/qat_algs.c
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@ -222,6 +222,9 @@ static int qat_alg_do_precomputes(struct icp_qat_hw_auth_algo_blk *hash,
return -EFAULT;
offset = round_up(qat_get_inter_state_size(ctx->qat_hash_alg), 8);
if (offset < 0)
return -EFAULT;
hash_state_out = (__be32 *)(hash->sha.state1 + offset);
hash512_state_out = (__be64 *)hash_state_out;