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perf report: Free generated help strings for sort option

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[ Upstream commit a37338aad8 ]

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@gmail.com>
Fixes: 702fb9b415 ("perf report: Show all sort keys in help output")
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/a38b13f02812a8a6759200b9063c6191337f44d4.1626343282.git.rickyman7@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Riccardo Mancini
2021-07-15 18:07:14 +02:00
committed by Greg Kroah-Hartman
parent 2bfa3c53ea
commit 51077d315a
3 changed files with 24 additions and 13 deletions
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2
tools/perf/util/sort.c
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@ -3177,7 +3177,7 @@ 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;