linux-kernel - [tip: perf/core] perf jevents: Fix resource leak in process

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Date:   Tue, 12 Nov 2019 11:18:11 -0000
From:   "tip-bot2 for Yunfeng Ye" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Yunfeng Ye <yeyunfeng@...wei.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Feilong Lin <linfeilong@...wei.com>,
        Hu Shiyuan <hushiyuan@...wei.com>,
        Jiri Olsa <jolsa@...hat.com>,
        John Garry <john.garry@...wei.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Luke Mujica <lukemujica@...gle.com>,
        Mark Rutland <mark.rutland@....com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf jevents: Fix resource leak in process_mapfile()
 and main()

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     1785fbb73896dbd9d27a406f0d73047df42db710
Gitweb:        https://git.kernel.org/tip/1785fbb73896dbd9d27a406f0d73047df42db710
Author:        Yunfeng Ye <yeyunfeng@...wei.com>
AuthorDate:    Wed, 16 Oct 2019 21:50:17 +08:00
Committer:     Arnaldo Carvalho de Melo <acme@...hat.com>
CommitterDate: Wed, 06 Nov 2019 15:43:06 -03:00

perf jevents: Fix resource leak in process_mapfile() and main()

There are memory leaks and file descriptor resource leaks in
process_mapfile() and main().

Fix this by adding free(), fclose() and free_arch_std_events() on the
error paths.

Fixes: 80eeb67fe577 ("perf jevents: Program to convert JSON file")
Fixes: 3f056b66647b ("perf jevents: Make build fail on JSON parse error")
Fixes: e9d32c1bf0cd ("perf vendor events: Add support for arch standard events")
Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Feilong Lin <linfeilong@...wei.com>
Cc: Hu Shiyuan <hushiyuan@...wei.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: John Garry <john.garry@...wei.com>
Cc: Kan Liang <kan.liang@...ux.intel.com>
Cc: Luke Mujica <lukemujica@...gle.com>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Zenghui Yu <yuzenghui@...wei.com>
Link: http://lore.kernel.org/lkml/d7907042-ec9c-2bef-25b4-810e14602f89@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/pmu-events/jevents.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index 7d69727..079c77b 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -772,6 +772,7 @@ static int process_mapfile(FILE *outfp, char *fpath)
 	char *line, *p;
 	int line_num;
 	char *tblname;
+	int ret = 0;
 
 	pr_info("%s: Processing mapfile %s\n", prog, fpath);
 
@@ -783,6 +784,7 @@ static int process_mapfile(FILE *outfp, char *fpath)
 	if (!mapfp) {
 		pr_info("%s: Error %s opening %s\n", prog, strerror(errno),
 				fpath);
+		free(line);
 		return -1;
 	}
 
@@ -809,7 +811,8 @@ static int process_mapfile(FILE *outfp, char *fpath)
 			/* TODO Deal with lines longer than 16K */
 			pr_info("%s: Mapfile %s: line %d too long, aborting\n",
 					prog, fpath, line_num);
-			return -1;
+			ret = -1;
+			goto out;
 		}
 		line[strlen(line)-1] = '\0';
 
@@ -839,7 +842,9 @@ static int process_mapfile(FILE *outfp, char *fpath)
 
 out:
 	print_mapping_table_suffix(outfp);
-	return 0;
+	fclose(mapfp);
+	free(line);
+	return ret;
 }
 
 /*
@@ -1136,6 +1141,7 @@ int main(int argc, char *argv[])
 		goto empty_map;
 	} else if (rc < 0) {
 		/* Make build fail */
+		fclose(eventsfp);
 		free_arch_std_events();
 		return 1;
 	} else if (rc) {
@@ -1148,6 +1154,7 @@ int main(int argc, char *argv[])
 		goto empty_map;
 	} else if (rc < 0) {
 		/* Make build fail */
+		fclose(eventsfp);
 		free_arch_std_events();
 		return 1;
 	} else if (rc) {
@@ -1165,6 +1172,8 @@ int main(int argc, char *argv[])
 	if (process_mapfile(eventsfp, mapfile)) {
 		pr_info("%s: Error processing mapfile %s\n", prog, mapfile);
 		/* Make build fail */
+		fclose(eventsfp);
+		free_arch_std_events();
 		return 1;
 	}