Re: [PATCH v6 13/13] perf trace: Fix BTF memory leak

[Arnaldo Carvalho de Melo]

On Mon, Mar 17, 2025 at 08:31:50PM -0700, Ian Rogers wrote:
> Add missing btf__free in trace__exit.
> 
> Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
> ---
>  tools/perf/builtin-trace.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index a5f31472980b..d4bbb6a1e817 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -5339,6 +5339,12 @@ static void trace__exit(struct trace *trace)
>  		zfree(&trace->syscalls.table);
>  	}
>  	zfree(&trace->perfconfig_events);
> +#ifdef HAVE_LIBBPF_SUPPORT
> +	if (trace->btf != NULL) {

No need for the check, btf__free() does:

void btf__free(struct btf *btf)
{
        if (IS_ERR_OR_NULL(btf))
                return;

Up to Namhyung to turn this into the simpler:

	btf__free(trace->btf);
	trace->btf = NULL;

> +		btf__free(trace->btf);
> +		trace->btf = NULL;
> +	}
> +#endif
>  }
>  
>  #ifdef HAVE_BPF_SKEL
> -- 
> 2.49.0.rc1.451.g8f38331e32-goog