From b78854e5c008b01265d78c181332a3bb66c0abdf Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 7 May 2024 00:04:06 -0300 Subject: perf probe: Use zfree() to avoid possibly accessing dangling pointers When freeing a->b it is good practice to set a->b to NULL using zfree(&a->b) so that when we have a bug where a reference to a freed 'a' pointer is kept somewhere, we can more quickly cause a segfault if some code tries to use a->b. Convert one such case in the 'perf probe' codebase. Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Kan Liang Cc: Namhyung Kim Link: https://lore.kernel.org/lkml/ZjpBnkL2wO3QJa5W@x1 Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tools/perf') diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 019fef8da6a8..003a3bcebfdf 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -325,7 +325,7 @@ static void cleanup_params(void) for (i = 0; i < params->nevents; i++) clear_perf_probe_event(params->events + i); line_range__clear(¶ms->line_range); - free(params->target); + zfree(¶ms->target); strfilter__delete(params->filter); nsinfo__put(params->nsi); zfree(¶ms); -- cgit v1.2.3