From: Michael Petlan Date: Mon, 10 Dec 2018 16:00:04 +0000 (-0500) Subject: perf stat: Avoid segfaults caused by negated options X-Git-Tag: v4.19.18~31 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8603cac28a78a0fda3aa2121388e399334e1bd18;p=platform%2Fkernel%2Flinux-rpi.git perf stat: Avoid segfaults caused by negated options [ Upstream commit 51433ead1460fb3f46e1c34f68bb22fd2dd0f5d0 ] Some 'perf stat' options do not make sense to be negated (event, cgroup), some do not have negated path implemented (metrics). Due to that, it is better to disable the "no-" prefix for them, since otherwise, the later opt-parsing segfaults. Before: $ perf stat --no-metrics -- ls Segmentation fault (core dumped) After: $ perf stat --no-metrics -- ls Error: option `no-metrics' isn't available Usage: perf stat [] [] Signed-off-by: Michael Petlan Tested-by: Arnaldo Carvalho de Melo LPU-Reference: 1485912065.62416880.1544457604340.JavaMail.zimbra@redhat.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index d097b5b4..4072015 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -1961,7 +1961,7 @@ static int parse_metric_groups(const struct option *opt, return metricgroup__parse_groups(opt, str, &metric_events); } -static const struct option stat_options[] = { +static struct option stat_options[] = { OPT_BOOLEAN('T', "transaction", &transaction_run, "hardware transaction statistics"), OPT_CALLBACK('e', "event", &evsel_list, "event", @@ -2847,6 +2847,12 @@ int cmd_stat(int argc, const char **argv) return -ENOMEM; parse_events__shrink_config_terms(); + + /* String-parsing callback-based options would segfault when negated */ + set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); + set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); + set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); + argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, (const char **) stat_usage, PARSE_OPT_STOP_AT_NON_OPTION);