lkml.org 
[lkml]   [2017]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [kernel-hardening] Re: [PATCH v6 03/11] mm, x86: Add support for eXclusive Page Frame Ownership (XPFO)
From
Date
On 11/14/2017 04:33 PM, Tycho Andersen wrote:
>>
>> void set_bh_page(struct buffer_head *bh,
>> ...
>> bh->b_data = page_address(page) + offset;
> Ah, yes. I guess there will be many bugs like this :). Anyway, I'll
> try to cook up a patch.

It won't catch all the bugs, but it might be handy to have a debugging
mode that records the location of the last user of page_address() and
friends. That way, when we trip over an unmapped page, we have an
easier time finding the offender.

\
 
 \ /
  Last update: 2017-11-15 01:37    [W:0.125 / U:0.152 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site