Re: [PATCH] Prevent buffer overflows when path is too big

On Mon, Oct 21, 2013 at 03:14:39PM -0400, Jeff King wrote:

On Mon, Oct 21, 2013 at 09:07:26PM +0200, Erik Faye-Lund wrote:

quoted

I would argue that this is probably even a bug on Linux, only harder
(if not impossible) to trigger by accident as there's probably no
git-client that will generate such trees. But a "malicious" client
might.

I've just been poking through the impacts of these overflows, for that
exact reason. I don't think any of them are easily triggerable by
somebody sending you a malicious tree (e.g., the `remove_subtree` one
only triggers when we have seen that tree in the filesystem, so it must
be limited to `PATH_MAX`). Some of them are triggerable if you use
particular options (e.g., the one in `match_order` is easy to trigger if
you use `diff -O`).

Actually, I take that back. The one in checkout_entry is quite easy to
trigger if the victim checks out your tree. The rest are much harder,
though.

-Peff

-- 
-- 
*** Please reply-to-all at all times ***
*** (do not pretend to know who is subscribed and who is not) ***
*** Please avoid top-posting. ***
The msysGit Wiki is here: https://github.com/msysgit/msysgit/wiki - Github accounts are free.

You received this message because you are subscribed to the Google
Groups "msysGit" group.
To post to this group, send email to msysgit@googlegroups.com
To unsubscribe from this group, send email to
msysgit+unsubscribe@googlegroups.com
For more options, and view previous threads, visit this group at
http://groups.google.com/group/msysgit?hl=en_US?hl=en

--- 
You received this message because you are subscribed to the Google Groups "msysGit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to msysgit+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.