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Date: Wed, 13 Jan 2021 20:02:20 -0800 From: Alexei Starovoitov <alexei.starovoitov@...il.com> To: KP Singh <kpsingh@...nel.org> Cc: Gilad Reti <gilad.reti@...il.com>, bpf <bpf@...r.kernel.org>, Yonghong Song <yhs@...com>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, John Fastabend <john.fastabend@...il.com>, Shuah Khan <shuah@...nel.org>, Networking <netdev@...r.kernel.org>, open list <linux-kernel@...r.kernel.org>, "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org> Subject: Re: [PATCH bpf v2 1/2] bpf: support PTR_TO_MEM{,_OR_NULL} register spilling On Wed, Jan 13, 2021 at 2:29 PM KP Singh <kpsingh@...nel.org> wrote: > > On Wed, Jan 13, 2021 at 6:38 AM Gilad Reti <gilad.reti@...il.com> wrote: > > > > Add support for pointer to mem register spilling, to allow the verifier > > to track pointers to valid memory addresses. Such pointers are returned > > for example by a successful call of the bpf_ringbuf_reserve helper. > > > > The patch was partially contributed by CyberArk Software, Inc. > > > > Fixes: 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") > > Suggested-by: Yonghong Song <yhs@...com> > > Signed-off-by: Gilad Reti <gilad.reti@...il.com> > > Acked-by: KP Singh <kpsingh@...nel.org> It's a border line feature vs fix. Since the patch is trivial and it addresses a real problem I've applied to the bpf tree. Thanks!
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