Re: Segmentation fault found while fuzzing .pack file under 2.7.0.rc3

Jeff King wrote:

Git packfiles come from two places:

  1. Local maintenance repacks loose and already-packed objects into a
     new packfile. We trust the local repack process to generate a valid
     packfile (though the contents of individual objects may be
     untrusted, of course).

I think we should reconsider such trust.  If one user creates a
malicious pack, if another user uses read-only git commands to access
the repository (after inspecting .git/config to make sure it doesn't
contain anything scary) the result should not be arbitrary code
execution.

Producing bogus output or aborting is okay; arbitrary code execution
less so.

Thanks,
Jonathan