Re: [PATCH] builtin/gc.c: fix use-after-free in maintenance_unregister()

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On Wed, Nov 16 2022, Derrick Stolee wrote:

> On 11/15/22 2:54 PM, Taylor Blau wrote:
>> On Tue, Nov 15, 2022 at 08:41:44PM +0100, Ævar Arnfjörð Bjarmason wrote:
>>>> @@ -1543,6 +1543,7 @@ static int maintenance_unregister(int argc, const char **argv, const char *prefi
>>>>  	int found = 0;
>>>>  	struct string_list_item *item;
>>>>  	const struct string_list *list;
>>>> +	struct config_set cs = { { 0 } };
>>>
>>> Just "{ 0 }" here instead? I see it may have been copied from some older
>>> pre-image though, and they'll do the same in either case, so it's not
>>> important...
>> 
>> Copying from other zero-initializations of `struct config_set`:
>> 
>>     $ git grep -oh 'struct config_set.*= {.*' | sort | uniq -c
>>           3 struct config_set cs = { { 0 } };
>
> Yes, without the double braces the compiler will complain on
> macOS, I believe.

Ah, that was sorted in 54795d37d9e (config.mak.dev: disable suggest
braces error on old clang versions, 2022-10-10).

It's fine here, we can follow-up for the #leftoverbits of changing those
some other time.




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