From: Riccardo Mancini <rickyman7@xxxxxxxxx>
[ Upstream commit a37338aad8c4d8676173ead14e881d2ec308155c ]
ASan reports the memory leak of the strings allocated by sort_help() when
running perf report.
This patch changes the returned pointer to char* (instead of const
char*), saves it in a temporary variable, and finally deallocates it at
function exit.
Signed-off-by: Riccardo Mancini <rickyman7@xxxxxxxxx>
Fixes: 702fb9b415e7c99b ("perf report: Show all sort keys in help output")
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lore.kernel.org/lkml/a38b13f02812a8a6759200b9063c6191337f44d4.1626343282.git.rickyman7@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
tools/perf/builtin-report.c | 33 ++++++++++++++++++++++-----------
tools/perf/util/sort.c | 2 +-
tools/perf/util/sort.h | 2 +-
3 files changed, 24 insertions(+), 13 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 36f9ccfeb38a..ce420f910ff8 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1167,6 +1167,8 @@ int cmd_report(int argc, const char **argv)
.annotation_opts = annotation__default_options,
.skip_empty = true,
};
+ char *sort_order_help = sort_help("sort by key(s):");
+ char *field_order_help = sort_help("output field(s): overhead period sample ");
const struct option options[] = {
OPT_STRING('i', "input", &input_name, "file",
"input file name"),
@@ -1201,9 +1203,9 @@ int cmd_report(int argc, const char **argv)
OPT_BOOLEAN(0, "header-only", &report.header_only,
"Show only data header."),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
- sort_help("sort by key(s):")),
+ sort_order_help),
OPT_STRING('F', "fields", &field_order, "key[,keys...]",
- sort_help("output field(s): overhead period sample ")),
+ field_order_help),
OPT_BOOLEAN(0, "show-cpu-utilization", &symbol_conf.show_cpu_utilization,
"Show sample percentage for different cpu modes"),
OPT_BOOLEAN_FLAG(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
@@ -1336,11 +1338,11 @@ int cmd_report(int argc, const char **argv)
char sort_tmp[128];
if (ret < 0)
- return ret;
+ goto exit;
ret = perf_config(report__config, &report);
if (ret)
- return ret;
+ goto exit;
argc = parse_options(argc, argv, options, report_usage, 0);
if (argc) {
@@ -1354,8 +1356,10 @@ int cmd_report(int argc, const char **argv)
report.symbol_filter_str = argv[0];
}
- if (annotate_check_args(&report.annotation_opts) < 0)
- return -EINVAL;
+ if (annotate_check_args(&report.annotation_opts) < 0) {
+ ret = -EINVAL;
+ goto exit;
+ }
if (report.mmaps_mode)
report.tasks_mode = true;
@@ -1369,12 +1373,14 @@ int cmd_report(int argc, const char **argv)
if (symbol_conf.vmlinux_name &&
access(symbol_conf.vmlinux_name, R_OK)) {
pr_err("Invalid file: %s\n", symbol_conf.vmlinux_name);
- return -EINVAL;
+ ret = -EINVAL;
+ goto exit;
}
if (symbol_conf.kallsyms_name &&
access(symbol_conf.kallsyms_name, R_OK)) {
pr_err("Invalid file: %s\n", symbol_conf.kallsyms_name);
- return -EINVAL;
+ ret = -EINVAL;
+ goto exit;
}
if (report.inverted_callchain)
@@ -1398,12 +1404,14 @@ int cmd_report(int argc, const char **argv)
repeat:
session = perf_session__new(&data, false, &report.tool);
- if (IS_ERR(session))
- return PTR_ERR(session);
+ if (IS_ERR(session)) {
+ ret = PTR_ERR(session);
+ goto exit;
+ }
ret = evswitch__init(&report.evswitch, session->evlist, stderr);
if (ret)
- return ret;
+ goto exit;
if (zstd_init(&(session->zstd_data), 0) < 0)
pr_warning("Decompression initialization failed. Reported data may be incomplete.\n");
@@ -1638,5 +1646,8 @@ error:
zstd_fini(&(session->zstd_data));
perf_session__delete(session);
+exit:
+ free(sort_order_help);
+ free(field_order_help);
return ret;
}
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 88ce47f2547e..568a88c001c6 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -3370,7 +3370,7 @@ static void add_hpp_sort_string(struct strbuf *sb, struct hpp_dimension *s, int
add_key(sb, s[i].name, llen);
}
-const char *sort_help(const char *prefix)
+char *sort_help(const char *prefix)
{
struct strbuf sb;
char *s;
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 87a092645aa7..b67c469aba79 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -302,7 +302,7 @@ void reset_output_field(void);
void sort__setup_elide(FILE *fp);
void perf_hpp__set_elide(int idx, bool elide);
-const char *sort_help(const char *prefix);
+char *sort_help(const char *prefix);
int report_parse_ignore_callees_opt(const struct option *opt, const char *arg, int unset);
--
2.30.2
