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Re: [PATCH v2] fetch-pack: clear alternate shallow when complete




Duy Nguyen <pclouds@xxxxxxxxx> writes:

> On Thu, Feb 7, 2019 at 7:00 AM brian m. carlson
> <sandals@xxxxxxxxxxxxxxxxxxxx> wrote:
>>
>> When we write an alternate shallow file in update_shallow, we write it
>> into the lock file. The string stored in alternate_shallow_file is
>> copied from the lock file path, but it is freed the moment that the lock
>> file is closed, since we call strbuf_release to free that path.
>>
>> This used to work, since we did not invoke git index-pack more than
>> once. However, we now do, and starting with bd0b42aed3 (fetch-pack: do
>> not take shallow lock unnecessarily - 2019-01-10), we no longer reset
>> this value unconditionally; consequently, we reuse the freed memory.
>> Ensure we reset the value to NULL to avoid using freed memory. git
>> index-pack will read the repository's shallow file, which will have been
>> updated with the correct information.
>
> The patch looks good to me.

Thanks, all.