AWS IAM Lambda "is not authorized to perform: lambda:GetFunction"

Question

When I have my IAM Policy for my lambda execution role set to:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "lambda:GetFunction"
            ],
            "Resource": [
                "*"
            ],
            "Effect": "Allow"
        }
    ]
}

I get this error:

[AccessDeniedException: User:
arn:aws:sts::xxx:assumed-role/supercoolsoftware-dev-us-west-2-lambdaRole/supercoolsoftware-dev-addEmail
is not authorized to perform: 
lambda:GetFunction on resource:
arn:aws:lambda:us-west-2:xxx:function:supercoolsoftware-dev-dailyEmail]

However, when I set the policy to:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "lambda:*"
            ],
            "Resource": [
                "*"
            ],
            "Effect": "Allow"
        }
    ]
}

The error is gone... What else do I need to add?

Answer 1

Figured it out. Apparently the SDK uses "lambda:GetFunctionConfiguration" as well. Once I included that it all worked.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "lambda:GetFunction",
                "lambda:GetFunctionConfiguration"
            ],
            "Resource": [
                "*"
            ],
            "Effect": "Allow"
        }
    ]
}