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perf bpf: Return NULL when RB tree lookup fails in perf_env__find_bpf_prog_info()

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We currently don't return NULL in case we don't find the
bpf_prog_info_node, fixing that.

Signed-off-by: Jiri Olsa <[email protected]>
Acked-by: Song Liu <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Fixes: e4378f0cb9 ("perf bpf: Save bpf_prog_info in a rbtree in perf_env")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Jiri Olsa 2019-04-16 15:41:51 +02:00 • committed by Arnaldo Carvalho de Melo
commit aa52660231
1 changed files with 3 additions and 1 deletions
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4
tools/perf/util/env.c
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@ -57,9 +57,11 @@ struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
else if (prog_id > node->info_linear->info.id)
n = n->rb_right;
else
break;
goto out;
}
node = NULL;
out:
up_read(&env->bpf_progs.lock);
return node;
}