This is a note to let you know that I've just added the patch titled
perf bpf: Fix two memory leakages when calling perf_env__insert_bpf_prog_info()
to the 6.12-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-bpf-fix-two-memory-leakages-when-calling-perf_e.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 71921abc38b269464d1b33255c9ba2c42e815335
Author: Zhongqiu Han <quic_zhonhan@xxxxxxxxxxx>
Date: Thu Dec 5 16:45:00 2024 +0800
perf bpf: Fix two memory leakages when calling perf_env__insert_bpf_prog_info()
[ Upstream commit 03edb7020bb920f1935c3f30acad0bb27fdb99af ]
If perf_env__insert_bpf_prog_info() returns false due to a duplicate bpf
prog info node insertion, the temporary info_node and info_linear memory
will leak. Add a check to ensure the memory is freed if the function
returns false.
Fixes: d56354dc49091e33 ("perf tools: Save bpf_prog_info and BTF of new BPF programs")
Reviewed-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Signed-off-by: Zhongqiu Han <quic_zhonhan@xxxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: James Clark <james.clark@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Song Liu <song@xxxxxxxxxx>
Cc: Yicong Yang <yangyicong@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241205084500.823660-4-quic_zhonhan@xxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c
index 13608237c50e0..c81444059ad07 100644
--- a/tools/perf/util/bpf-event.c
+++ b/tools/perf/util/bpf-event.c
@@ -289,7 +289,10 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_session *session,
}
info_node->info_linear = info_linear;
- perf_env__insert_bpf_prog_info(env, info_node);
+ if (!perf_env__insert_bpf_prog_info(env, info_node)) {
+ free(info_linear);
+ free(info_node);
+ }
info_linear = NULL;
/*
@@ -480,7 +483,10 @@ static void perf_env__add_bpf_info(struct perf_env *env, u32 id)
info_node = malloc(sizeof(struct bpf_prog_info_node));
if (info_node) {
info_node->info_linear = info_linear;
- perf_env__insert_bpf_prog_info(env, info_node);
+ if (!perf_env__insert_bpf_prog_info(env, info_node)) {
+ free(info_linear);
+ free(info_node);
+ }
} else
free(info_linear);
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 3260eaf267387..d981b6f4bc5ea 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -22,12 +22,16 @@ struct perf_env perf_env;
#include "bpf-utils.h"
#include <bpf/libbpf.h>
-void perf_env__insert_bpf_prog_info(struct perf_env *env,
+bool perf_env__insert_bpf_prog_info(struct perf_env *env,
struct bpf_prog_info_node *info_node)
{
+ bool ret;
+
down_write(&env->bpf_progs.lock);
- __perf_env__insert_bpf_prog_info(env, info_node);
+ ret = __perf_env__insert_bpf_prog_info(env, info_node);
up_write(&env->bpf_progs.lock);
+
+ return ret;
}
bool __perf_env__insert_bpf_prog_info(struct perf_env *env, struct bpf_prog_info_node *info_node)
diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
index f170a1fb0c8c2..38de0af2a6808 100644
--- a/tools/perf/util/env.h
+++ b/tools/perf/util/env.h
@@ -178,7 +178,7 @@ int perf_env__nr_cpus_avail(struct perf_env *env);
void perf_env__init(struct perf_env *env);
bool __perf_env__insert_bpf_prog_info(struct perf_env *env,
struct bpf_prog_info_node *info_node);
-void perf_env__insert_bpf_prog_info(struct perf_env *env,
+bool perf_env__insert_bpf_prog_info(struct perf_env *env,
struct bpf_prog_info_node *info_node);
struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
__u32 prog_id);
