Re: [PATCH][RESEND] lib/vsprintf: make-printk-non-secret printks all addresses as unhashed

From: Andy Shevchenko
Date: Wed Feb 03 2021 - 14:32:38 EST


On Wed, Feb 03, 2021 at 12:58:41PM -0600, Timur Tabi wrote:
> On 2/3/21 7:31 AM, Petr Mladek wrote:
> > Also please make sure that lib/test_printf.c will work with
> > the new option.
>
> As you suspected, it doesn't work:
>
> [ 206.966478] test_printf: loaded.
> [ 206.966528] test_printf: plain 'p' does not appear to be hashed
> [ 206.966740] test_printf: failed 1 out of 388 tests
>
> What should I do about this?
>
> On one hand, it is working as expected: %p is not hashed, and that should be
> a warning.
>
> On the other hand, maybe test_printf should be aware of the command line
> parameter and test to make sure that %p is NOT hashed?

test_printf.c should be altered accordingly to avoid any failed test cases.
I.o.w. you need to have some kind of conditional there:

if (kernel_cmdline_parameter_foo)
expect bar
else
expect baz

--
With Best Regards,
Andy Shevchenko