bpf: Allow bpf_current_task_under_cgroup in interrupt
Currently, the bpf_current_task_under_cgroup helper has a check where if the BPF program is running in_interrupt(), it will return -EINVAL. This prevents the helper to be used in many useful scenarios, particularly BPF programs attached to Perf Events. This commit removes the check. Tested a few NMI (Perf Event) and some softirq context, the helper returns the correct result. Signed-off-by:Teng Qin <qinteng@fb.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org>
parent
fcf85729
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