lkml.org 
[lkml]   [2018]   [Oct]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] ARM: mm: Facilitate debugging CONFIG_KUSER_HELPERS disabled
From
Date
On 10/25/18 11:25 AM, Eric W. Biederman wrote:
> Florian Fainelli <f.fainelli@gmail.com> writes:
>
>> Some software such as perf makes unconditional use of the special
>> [vectors] page which is only provided when CONFIG_KUSER_HELPERS is
>> enabled in the kernel.
>>
>> Facilitate the debugging of such situations by printing a debug message
>> to the kernel log showing the task name and the faulting address.
>
> Can't someone trigger this segv deliberately and spam the kerne log?
> Doesn't this need something like printk_ratelimit or something to ensure
> this message only gets printed once?

Yes, good point, thanks.
--
Florian

\
 
 \ /
  Last update: 2018-10-25 20:51    [W:0.079 / U:4.044 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site