Re: [PATCH bpf-next v3 1/2] bpf: Fix sleepable check for tracing prog

[Leon Hwang]

On 5/8/26 07:39, Andrii Nakryiko wrote:
> On Tue, Aug 4, 2026 at 7:57 AM Leon Hwang <leon.hwang@xxxxxxxxx> wrote:
[...]
>> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
>> index b274004fccfd..7bb541e343b2 100644
>> --- a/kernel/bpf/verifier.c
>> +++ b/kernel/bpf/verifier.c
>> @@ -19019,6 +19019,9 @@ static int btf_id_allow_sleepable(u32 btf_id, unsigned long addr, const struct b
>>
>>         switch (prog->type) {
>>         case BPF_PROG_TYPE_TRACING:
>> +               if (!btf_is_kernel(btf))
>> +                       return -EINVAL;
>> +
> 
> see sashiko reply, just move it outside of switch and disallow
> sleepable for anything that is not kernel/module BTF, regardless of
> program type
> 

Ack.

I think another Fixes tag is needed for the LSM case.

Thanks,
Leon