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crypto: qat - add param check for DH

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[ Upstream commit 2acbb8771f6ac82422886e63832ee7a0f4b1635b ]

Reject requests with a source buffer that is bigger than the size of the
key. This is to prevent a possible integer underflow that might happen
when copying the source scatterlist into a linear buffer.

Cc: stable@vger.kernel.org
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Adam Guerin <adam.guerin@intel.com>
Reviewed-by: Wojciech Ziemba <wojciech.ziemba@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Giovanni Cabiddu
2022-05-09 14:34:15 +01:00
committed by Greg Kroah-Hartman
parent 4d6d2adce0
commit e7f979ed51
1 changed files with 4 additions and 0 deletions
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4
drivers/crypto/qat/qat_common/qat_asym_algs.c
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@@ -235,6 +235,10 @@ static int qat_dh_compute_value(struct kpp_request *req)
req->dst_len = ctx->p_size;
return -EOVERFLOW;
}
if (req->src_len > ctx->p_size)
return -EINVAL;
memset(msg, '\0', sizeof(*msg));
ICP_QAT_FW_PKE_HDR_VALID_FLAG_SET(msg->pke_hdr,
ICP_QAT_FW_COMN_REQ_FLAG_SET);