lkml.org 
[lkml]   [2017]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 00/14] Fix wrong %pF and %pS printk format specifier usages
On Fri, Sep 08, 2017 at 03:18:30PM +0900, Sergey Senozhatsky wrote:
> if the addr is not in kernel .text, then try dereferencing it and check
> if the dereferenced addr is in kernel .text.

If it really is a function pointer, then we know that it is safe
to dereference. But if it isn't, then maybe not?

If it is a function pointer then dereferening will indeed give
us a .text address. But if it isn't, it might still give us a
.text address (we could reduce the probability of a false hit
by checking that the .text address was exactly on a symbol with
no offset ... but data values that happen to be the addresses of
function entry points are possible).

-Tony

\
 
 \ /
  Last update: 2017-09-08 19:25    [W:0.249 / U:0.476 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site