Re: [PATCH 2/6] autofs4 - remove string terminator check

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

 



This response is a bit confusing, let me try to fix that.

On Tue, 2008-10-28 at 09:27 +0900, Ian Kent wrote:
> On Mon, 2008-10-27 at 13:31 -0700, Andrew Morton wrote:
> > On Thu, 23 Oct 2008 10:35:22 +0800
> > Ian Kent <raven@xxxxxxxxxx> wrote:
> > 
> > > Remove unnecessary string terminator check.
> > 
> > Why is it unnecessary?
> > 
> > Does this change alter behaviour in any way?
> > 
> > Does it fix a bug?
> 
> Umm .... it was done in response to your comment, quoted below ...
> 
<quote>
> > +/*
> > + * Check a string doesn't overrun the chunk of
> > + * memory we copied from user land.
> > + */
> > +static int invalid_str(char *str, void *end)
> > +{
> > +     while ((void *) str <= end)
> > +             if (!*str++)
> > +                     return 0;
> > +     return -EINVAL;
> > +}
> 
> What is this?  We copy strings in from userspace in 10000 different
> places without needing checks such as this?
</quote>


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

[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux