lkml.org 
[lkml]   [2017]   [Sep]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Buffer overflow in the mptctl_replace_fw() function in linux kernel MPT ioctl driver
On Fri, Sep 01, 2017 at 02:00:48PM +0800, Dison River wrote:
> newFwSize = ALIGN(karg.newImageSize, 4);

This is an integer overflow, but it's harmless... As a static checker
developer this is where I would print a warning:
drivers/message/fusion/mptctl.c:1748 mptctl_replace_fw() warn: potential integer overflow from user '((karg.newImageSize)) + (((4)) - 1)'
I also caught the integer overflow from two days ago but there are too
many ones like this so I can't check them all. In mpt_alloc_fw_memory()
there is another potential integer overflow when we do:

ioc->alloc_total += size;

But ->alloc_total is not used anywhere.

I don't see a buffer overflow here.

regards,
dan carpenter

\
 
 \ /
  Last update: 2017-09-01 10:25    [W:0.033 / U:36.216 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site