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authorJiri Olsa <jolsa@kernel.org>2019-04-17 16:55:39 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2019-04-17 14:30:23 -0300
commit2db7b1e0bd49d2b0e7d16949e167b1cfaf5c07cf (patch)
tree3c6a3e0735cd8cbc8eb83dc2209b22646fbf154a /tools
parentb9abbdfa88024d52c8084d8f46ea4f161606c692 (diff)
perf bpf: Return NULL when RB tree lookup fails in perf_env__find_btf()
We don't return NULL when we don't find the bpf_prog_info_node, fix that. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Reported-by: Song Liu <songliubraving@fb.com> Acked-by: Song Liu <songliubraving@fb.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: 3792cb2ff43b ("perf bpf: Save BTF in a rbtree in perf_env") Link: http://lkml.kernel.org/r/20190417145539.11669-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/env.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 34a363f2e71b..9494f9dc61ec 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -111,10 +111,12 @@ struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
else if (btf_id > node->id)
n = n->rb_right;
else
- break;
+ goto out;
}
+ node = NULL;
up_read(&env->bpf_progs.lock);
+out:
return node;
}