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: e4378f0cb90b ("perf bpf: Save bpf_prog_info in a rbtree in perf_env") Fixes: d56354dc4909 ("perf tools: Save bpf_prog_info and BTF of new BPF programs") Signed-off-by: Zhongqiu Han <quic_zhonhan@xxxxxxxxxxx> Reviewed-by: Namhyung Kim <namhyung@xxxxxxxxxx> --- tools/perf/util/bpf-event.c | 10 ++++++++-- tools/perf/util/env.c | 8 ++++++-- tools/perf/util/env.h | 2 +- 3 files changed, 15 insertions(+), 5 deletions(-) diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c index 13608237c50e..c81444059ad0 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 d7865ae5f8f5..a6321e7f0633 100644 --- a/tools/perf/util/env.c +++ b/tools/perf/util/env.c @@ -24,12 +24,16 @@ 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 9db2e5a625ed..da11add761d0 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); -- 2.25.1