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perf report: Fix memory leaks around perf_tip()

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[ Upstream commit d9fc706108c15f8bc2d4ccccf8e50f74830fabd9 ]

perf_tip() may allocate memory or use a literal, this means memory
wasn't freed if allocated. Change the API so that literals aren't used.

At the same time add missing frees for system_path. These issues were
spotted using leak sanitizer.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.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>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211118073804.2149974-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ian Rogers
2021-11-17 23:38:04 -08:00
committed by Greg Kroah-Hartman
parent a4c17ebdd6
commit ff061b5bda
3 changed files with 17 additions and 14 deletions
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14
tools/perf/util/util.c
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@@ -379,32 +379,32 @@ fetch_kernel_version(unsigned int *puint, char *str,
return 0;
}
const char *perf_tip(const char *dirpath)
int perf_tip(char **strp, const char *dirpath)
{
struct strlist *tips;
struct str_node *node;
char *tip = NULL;
struct strlist_config conf = {
.dirname = dirpath,
.file_only = true,
};
int ret = 0;
*strp = NULL;
tips = strlist__new("tips.txt", &conf);
if (tips == NULL)
return errno == ENOENT ? NULL :
"Tip: check path of tips.txt or get more memory! ;-p";
return -errno;
if (strlist__nr_entries(tips) == 0)
goto out;
node = strlist__entry(tips, random() % strlist__nr_entries(tips));
if (asprintf(&tip, "Tip: %s", node->s) < 0)
tip = (char *)"Tip: get more memory! ;-)";
if (asprintf(strp, "Tip: %s", node->s) < 0)
ret = -ENOMEM;
out:
strlist__delete(tips);
return tip;
return ret;
}
char *perf_exe(char *buf, int len)