linux-kernel - Re: [PATCH 01/11] parse-events: Free flag/sym field on failure path

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Date:	Tue, 24 Apr 2012 09:05:01 +0900
From:	Namhyung Kim <namhyung.kim@....com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	David Ahern <dsahern@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/11] parse-events: Free flag/sym field on failure path

Hi,

On Mon, 23 Apr 2012 12:21:06 -0400, Steven Rostedt wrote:
> On Mon, 2012-04-23 at 13:58 +0900, Namhyung Kim wrote:
>> If parsing flag/sym field failed after allocating it, it
>> should be freed.
>> 
>> Signed-off-by: Namhyung Kim <namhyung.kim@....com>
>> ---
>>  parse-events.c |   14 +++++++++-----
>>  1 file changed, 9 insertions(+), 5 deletions(-)
>> 
>> diff --git a/parse-events.c b/parse-events.c
>> index bd078ba..81e6581 100644
>> --- a/parse-events.c
>> +++ b/parse-events.c
>> @@ -2166,10 +2166,10 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
>>  
>>  		value = arg_eval(arg);
>>  		if (value == NULL)
>> -			goto out_free;
>> +			goto out_free_field;
>
> Instead of adding more goto's what, before the first goto "out_free"
> add:
>
> 	field = NULL;
>
> and since the field is allocated and also memset to zero, we could do in
> the out_free:
>
> 	if (field) {
> 		free(field->value);
> 		free(field);
> 	}
>
> I think that would be cleaner.
>
> -- Steve
>

OK, will resend v2.

Thanks,
Namhyung
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