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| author | Jiri Olsa <jolsa@kernel.org> | 2019-04-17 16:55:39 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-04-17 14:30:23 -0300 |
| commit | 2db7b1e0bd49d2b0e7d16949e167b1cfaf5c07cf (patch) | |
| tree | 3c6a3e0735cd8cbc8eb83dc2209b22646fbf154a /tools | |
| parent | b9abbdfa88024d52c8084d8f46ea4f161606c692 (diff) | |
| download | lwn-2db7b1e0bd49d2b0e7d16949e167b1cfaf5c07cf.tar.gz lwn-2db7b1e0bd49d2b0e7d16949e167b1cfaf5c07cf.zip | |
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.c | 4 |
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; } |