From: Zheng Zengkai <zhengzengkai@huawei.com>
Date: Fri, 3 Jul 2020 09:33:44 +0000 (+0800)
Subject: perf record: Fix memory leak when using '--user-regs=?' to list registers
X-Git-Tag: v4.4.249~42
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3336a75e04b314db69856d636e1287a3b942c92f;p=thirdparty%2Fkernel%2Fstable.git

perf record: Fix memory leak when using '--user-regs=?' to list registers

[ Upstream commit 2eb5dd418034ecea2f7031e3d33f2991a878b148 ]

When using 'perf record's option '-I' or '--user-regs=' along with
argument '?' to list available register names, memory of variable 'os'
allocated by strdup() needs to be released before __parse_regs()
returns, otherwise memory leak will occur.

Fixes: bcc84ec65ad1 ("perf record: Add ability to name registers to record")
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Li Bin <huawei.libin@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20200703093344.189450-1-zhengzengkai@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/tools/perf/util/parse-regs-options.c b/tools/perf/util/parse-regs-options.c
index 4f2c1c255d818..a8865d1c3e818 100644
--- a/tools/perf/util/parse-regs-options.c
+++ b/tools/perf/util/parse-regs-options.c
@@ -40,7 +40,7 @@ parse_regs(const struct option *opt, const char *str, int unset)
 				}
 				fputc('\n', stderr);
 				/* just printing available regs */
-				return -1;
+				goto error;
 			}
 			for (r = sample_reg_masks; r->name; r++) {
 				if (!strcasecmp(s, r->name))