[kernel-hardening] Re: [PATCH 1/3] kallsyms: don't leak address when symbol not found

Felix Fietkau
2017-12-18T09:55:34Z

On 2017-12-18 00:53, Tobin C. Harding wrote:
> Currently if kallsyms_lookup() fails to find the symbol then the address
> is printed. This potentially leaks sensitive information. Instead of
> printing the address we can return an error, giving the calling code the
> option to print the address or print some sanitized message.
>
> Return error instead of printing address to argument buffer. Leave
> buffer in a sane state.
>
> Signed-off-by: Tobin C. Harding <me@tobin.cc>
I think there should be a way to keep the old behavior for debugging.

- Felix