Messages in this thread | | | Date | Tue, 08 Aug 2017 18:11:33 -0700 (PDT) | Subject | Re: [PATCH net-next v2 2/2] bpf: Extend check_uarg_tail_zero() checks | From | David Miller <> |
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From: Mickaël Salaün <mic@digikod.net> Date: Mon, 7 Aug 2017 20:45:20 +0200
> The function check_uarg_tail_zero() was created from bpf(2) for > BPF_OBJ_GET_INFO_BY_FD without taking the access_ok() nor the PAGE_SIZE > checks. Make this checks more generally available while unlikely to be > triggered, extend the memory range check and add an explanation > including why the ToCToU should not be a security concern. > > Signed-off-by: Mickaël Salaün <mic@digikod.net> > Acked-by: Daniel Borkmann <daniel@iogearbox.net> > Cc: Alexei Starovoitov <ast@kernel.org> > Cc: David S. Miller <davem@davemloft.net> > Cc: Kees Cook <keescook@chromium.org> > Cc: Martin KaFai Lau <kafai@fb.com> > Link: https://lkml.kernel.org/r/CAGXu5j+vRGFvJZmjtAcT8Hi8B+Wz0e1b6VKYZHfQP_=DXzC4CQ@mail.gmail.com
Applied.
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