Commit 2db7b1e0 authored Apr 17, 2019 by Jiri Olsa Committed by Arnaldo Carvalho de Melo Apr 17, 2019

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: 3792cb2f ("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>

parent b9abbdfa

tools/perf/util/env.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}