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Date: Tue, 28 Sep 2021 16:33:53 -0700 From: Alexei Starovoitov <alexei.starovoitov@...il.com> To: Kees Cook <keescook@...omium.org> Cc: 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>, KP Singh <kpsingh@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Network Development <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>, linux-hardening@...r.kernel.org Subject: Re: [PATCH bpf-next v2 0/2] bpf: Build with -Wcast-function-type On Tue, Sep 28, 2021 at 4:09 PM Kees Cook <keescook@...omium.org> wrote: > > Hi, > > In order to keep ahead of cases in the kernel where Control Flow Integrity > (CFI) may trip over function call casts, enabling -Wcast-function-type > is helpful. To that end, replace BPF_CAST_CALL() as it triggers warnings > with this option and is now one of the last places in the kernel in need > of fixing. > > Thanks, > > -Kees > > v2: > - rebase to bpf-next > - add acks > v1: https://lore.kernel.org/lkml/20210927182700.2980499-1-keescook@chromium.org Applied. Thanks
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