svn commit: r298664 - head/sys/fs/msdosfs

[Shawn Webb]

On Tue, Apr 26, 2016 at 08:36:32PM +0000, Kristof Provost wrote:
> Author: kp
> Date: Tue Apr 26 20:36:32 2016
> New Revision: 298664
> URL: https://svnweb.freebsd.org/changeset/base/298664
> 
> Log:
>   msdosfs: Prevent buffer overflow when expanding win95 names
>   
>   In win2unixfn() we expand Windows 95 style long names. In some cases that
>   requires moving the data in the nbp->nb_buf buffer backwards to make room. That
>   code failed to check for overflows, leading to a stack overflow in win2unixfn().
>   
>   We now check for this event, and mark the entire conversion as failed in that
>   case. This means we present the 8 character, dos style, name instead.
>   
>   PR: 204643
>   Differential Revision:	https://reviews.freebsd.org/D6015

Will this be MFC'd? Since it's triggerable as non-root, should this have
a CVE? Though the commit log shows technical comments, it doesn't show
related security information.

Thanks,

-- 
Shawn Webb
HardenedBSD

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