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SubjectRe: [PATCH] tools lib traceevent: Fix memory leakage in copy_filter_type
On Fri, 25 Oct 2019 04:23:12 -0400
Hewenliang <hewenliang4@huawei.com> wrote:

> It is necessary to free the memory that we have allocated
> when error occurs.
>
> Fixes: ef3072cd1d5c ("tools lib traceevent: Get rid of die in add_filter_type()")
> Signed-off-by: Hewenliang <hewenliang4@huawei.com>

Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

Arnaldo,

Can you take this?

-- Steve

> ---
> tools/lib/traceevent/parse-filter.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c
> index 552592d153fb..fbaa790d10d8 100644
> --- a/tools/lib/traceevent/parse-filter.c
> +++ b/tools/lib/traceevent/parse-filter.c
> @@ -1473,8 +1473,10 @@ static int copy_filter_type(struct tep_event_filter *filter,
> if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) {
> /* Add trivial event */
> arg = allocate_arg();
> - if (arg == NULL)
> + if (arg == NULL) {
> + free(str);
> return -1;
> + }
>
> arg->type = TEP_FILTER_ARG_BOOLEAN;
> if (strcmp(str, "TRUE") == 0)
> @@ -1483,8 +1485,11 @@ static int copy_filter_type(struct tep_event_filter *filter,
> arg->boolean.value = 0;
>
> filter_type = add_filter_type(filter, event->id);
> - if (filter_type == NULL)
> + if (filter_type == NULL) {
> + free(str);
> + free(arg);
> return -1;
> + }
>
> filter_type->filter = arg;
>

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