On Fri, Apr 11, 2014 at 2:28 AM, Junio C Hamano <gits...@pobox.com> wrote:
> Yiannis Marangos <yiannis.maran...@gmail.com> writes:
>
>> +     n = xpread(fd, sha1, 20, st.st_size - 20);
>> +     if (n != 20)
>> +             goto out;
>
> I think it is possible for pread(2) to give you a short-read.
>
> The existing callers of emulated mmap and index-pack are prepared to
> handle a short-read correctly, but I do not think this code does.
>
> I'll queue this instead in the meantime.

There are two things to sort out (sorry I can't spend much time on it
right now): should the same sha1 test be done in write_index(), in
addition to update_index_if_able(). And what do we do about
istate->sha1[] in discard_index(), keep it or clear it.
-- 
Duy
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