Patch "perf sched: Fix memory leak in perf_sched__map()" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    perf sched: Fix memory leak in perf_sched__map()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     perf-sched-fix-memory-leak-in-perf_sched__map.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 1e13624a1c506e8221f0632909490062c6f439e3
Author: Yang Jihong <yangjihong1@xxxxxxxxxx>
Date:   Tue Feb 6 08:32:25 2024 +0000

    perf sched: Fix memory leak in perf_sched__map()
    
    [ Upstream commit ef76a5af819743d405674f6de5d0e63320ac653e ]
    
    perf_sched__map() needs to free memory of map_cpus, color_pids and
    color_cpus in normal path and rollback allocated memory in error path.
    
    Signed-off-by: Yang Jihong <yangjihong1@xxxxxxxxxx>
    Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240206083228.172607-3-yangjihong1@xxxxxxxxxx
    Stable-dep-of: 1a5efc9e13f3 ("libsubcmd: Don't free the usage string")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 2d36b06d4d877..8143828fdc585 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -3252,8 +3252,6 @@ static int perf_sched__lat(struct perf_sched *sched)
 
 static int setup_map_cpus(struct perf_sched *sched)
 {
-	struct perf_cpu_map *map;
-
 	sched->max_cpu.cpu  = sysconf(_SC_NPROCESSORS_CONF);
 
 	if (sched->map.comp) {
@@ -3262,16 +3260,15 @@ static int setup_map_cpus(struct perf_sched *sched)
 			return -1;
 	}
 
-	if (!sched->map.cpus_str)
-		return 0;
-
-	map = perf_cpu_map__new(sched->map.cpus_str);
-	if (!map) {
-		pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
-		return -1;
+	if (sched->map.cpus_str) {
+		sched->map.cpus = perf_cpu_map__new(sched->map.cpus_str);
+		if (!sched->map.cpus) {
+			pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
+			zfree(&sched->map.comp_cpus);
+			return -1;
+		}
 	}
 
-	sched->map.cpus = map;
 	return 0;
 }
 
@@ -3311,20 +3308,34 @@ static int setup_color_cpus(struct perf_sched *sched)
 
 static int perf_sched__map(struct perf_sched *sched)
 {
+	int rc = -1;
+
 	if (setup_map_cpus(sched))
-		return -1;
+		return rc;
 
 	if (setup_color_pids(sched))
-		return -1;
+		goto out_put_map_cpus;
 
 	if (setup_color_cpus(sched))
-		return -1;
+		goto out_put_color_pids;
 
 	setup_pager();
 	if (perf_sched__read_events(sched))
-		return -1;
+		goto out_put_color_cpus;
+
+	rc = 0;
 	print_bad_events(sched);
-	return 0;
+
+out_put_color_cpus:
+	perf_cpu_map__put(sched->map.color_cpus);
+
+out_put_color_pids:
+	perf_thread_map__put(sched->map.color_pids);
+
+out_put_map_cpus:
+	zfree(&sched->map.comp_cpus);
+	perf_cpu_map__put(sched->map.cpus);
+	return rc;
 }
 
 static int perf_sched__replay(struct perf_sched *sched)