lkml.org 
[lkml]   [2004]   [Nov]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Buffer overrun in arch/x86_64/sys_ia32.c:sys32_ni_syscall()
From
Date
On Tue, 2004-11-30 at 10:31 -0800, Chris Wright wrote:
> * Jeremy Fitzhardinge (jeremy@goop.org) wrote:
> > struct task_struct.comm is defined to be 16 chars, but
> > arch/x86_64/sys_ia32.c:sys32_ni_syscall() copies it into a static 8 byte
> > buffer, which will surely cause problems. This patch makes lastcomm[]
> > the right size, and makes sure it can't be overrun. Since the code also
> > goes to the effort of getting a local copy of current in "me", we may as
> > well use it for printing the message.
>
> Looks good, but you missed sys32_vm86_warning.

Hadn't got that far. Should we be worried that task_struct.comm might
not be \0-terminated, and therefore use ("... %.*s ...",
sizeof(lastcomm), lastcomm) in the printk's?

J

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:08    [W:0.042 / U:11.468 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site