Re: [PATCH bpf-next] bpf: check signal validity in nmi for bpf_send_signal() helper
From: Daniel Borkmann <daniel@iogearbox.net>
Date: 2019-05-28 09:24:43
Also in:
bpf
On 05/25/2019 08:57 PM, Yonghong Song wrote:
Commit 8b401f9ed244 ("bpf: implement bpf_send_signal() helper")
introduced bpf_send_signal() helper. If the context is nmi,
the sending signal work needs to be deferred to irq_work.
If the signal is invalid, the error will appear in irq_work
and it won't be propagated to user.
This patch did an early check in the helper itself to
notify user invalid signal, as suggested by Daniel.
Signed-off-by: Yonghong Song <redacted>Applied, thanks!