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Date: Tue, 12 Jan 2021 14:57:34 +0100 From: KP Singh <kpsingh@...nel.org> To: Gilad Reti <gilad.reti@...il.com> Cc: bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>, Networking <netdev@...r.kernel.org>, open list <linux-kernel@...r.kernel.org> Subject: Re: [PATCH bpf 1/2] bpf: support PTR_TO_MEM{,_OR_NULL} register spilling On Tue, Jan 12, 2021 at 10:14 AM Gilad Reti <gilad.reti@...il.com> wrote: > > Add support for pointer to mem register spilling, to allow the verifier > to track pointer to valid memory addresses. Such pointers are returned nit: pointers > for example by a successful call of the bpf_ringbuf_reserve helper. > > This patch was suggested as a solution by Yonghong Song. You can use the "Suggested-by:" tag for this. > > The patch was partially contibuted by CyberArk Software, Inc. nit: typo *contributed Also, I was wondering if "partially" here means someone collaborated with you on the patch? And, in that case: "Co-developed-by:" would be a better tag here. Acked-by: KP Singh <kpsingh@...nel.org> > > Fixes: 457f44363a88 ("bpf: Implement BPF ring buffer and verifier > support for it") > Signed-off-by: Gilad Reti <gilad.reti@...il.com> > --- > kernel/bpf/verifier.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c > index 17270b8404f1..36af69fac591 100644 > --- a/kernel/bpf/verifier.c > +++ b/kernel/bpf/verifier.c > @@ -2217,6 +2217,8 @@ static bool is_spillable_regtype(enum bpf_reg_type type) > case PTR_TO_RDWR_BUF: > case PTR_TO_RDWR_BUF_OR_NULL: > case PTR_TO_PERCPU_BTF_ID: > + case PTR_TO_MEM: > + case PTR_TO_MEM_OR_NULL: > return true; > default: > return false; > -- > 2.27.0 >
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