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>
req->dst_len = ctx->key_sz;
return -EOVERFLOW;
}
+
+ if (req->src_len > ctx->key_sz)
+ 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);
req->dst_len = ctx->key_sz;
return -EOVERFLOW;
}
+
+ if (req->src_len > ctx->key_sz)
+ 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);