Re: [PATCH 04/16] elfops: add strict bounds checking to get/load_section()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Mon, 2009-05-18 at 22:18 +0100, Alan Jenkins wrote:
> On 5/18/09, Andreas Robinson <andr345@xxxxxxxxx> wrote:
> > Would it be terribly ugly to have next_string() check that a terminator
> > exists at the end of the section and if it doesn't, insert one and then
> > write a warning message to the log?
> 
> Yeah, terribly ugly :-).  That would require mapping the file as copy
> on write (private).  But I _think_ we should be able to run on NOMMU,
> where that is not supported.
> 
> I would prefer that the program refuse to handle the module if it is
> discovered to be corrupt.  I don't think we should try and work around
> such corruption.

The easy way is if next_string() checks the terminator, prints a warning
if it's missing, and returns NULL, i.e finds no strings at all.

OTOH, the program wouldn't exactly refuse anything in this case, just
misbehave. I will write up a patch that actually makes it stop and
complain. 

> 
> Alan

--
To unsubscribe from this list: send the line "unsubscribe linux-modules" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Big List of Linux Books]

  Powered by Linux