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Date:   Mon, 22 Apr 2019 04:01:38 -0400
From:   Bo YU <>
Cc:     Bo YU <>,,,
Subject: [PATCH] perf bpf: return value with unlocking in perf_env__find_btf()

In perf_env__find_btf(), returning without unlocking
"env->bpf_progs.lock". There may be cause lockdep issue.

DEtected by CoversityScan, CID# 1444762:(program hangs(LOCK))

Fixes: 2db7b1e0bd49d: (perf bpf: Return NULL when RB tree lookup fails in perf_env__find_btf())
Signed-off-by: Bo YU <>
 tools/perf/util/env.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 9494f9dc61ec..6a3eaf7d9353 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -115,8 +115,8 @@ struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
 	node = NULL;
-	up_read(&env->bpf_progs.lock);
+	up_read(&env->bpf_progs.lock);
 	return node;

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