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SubjectRe: [PATCH] perf bpf: Fix lock/unlock imbalance in perf_env__find_btf() info
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On 4/22/19 11:05 AM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Apr 22, 2019 at 10:10:56AM -0500, Gustavo A. R. Silva escreveu:
>> Fix lock/unlock imbalance by moving the call to up_read() just after
>> the *out* label.
>>
>> Addresses-Coverity-ID: 1444762 ("Missing unlock")
>> Fixes: 2db7b1e0bd49 ("perf bpf: Return NULL when RB tree lookup fails in perf_env__find_btf()")
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>> ---
>> 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);
>> out:
>> + up_read(&env->bpf_progs.lock);
>> return node;
>> }
>
> too late, this was fixed already, also detected by coverity :-)
>

Good to know it's fixed now. :)

Thanks
--
Gustavo

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