On 09/09/2015 06:07 PM, Alexei Starovoitov wrote:
On Wed, Sep 09, 2015 at 09:50:35AM -0600, Tycho Andersen wrote:
[...]
Thoughts?
Please do not add any per-instruction hacks. None of them are
necessary. Classic had to do extra ugly checks in seccomp only
because verifier wasn't flexible enough.
If you don't want to see any BPF_CALL in seccomp, just have
empty get_func_proto() callback for BPF_PROG_TYPE_SECCOMP
and verifier will reject all calls.
Currently we have only two non-generic instrucitons
LD_ABS and LD_IND that are avaialable for sockets/TC only,
because these are legacy instructions and we had to make
exceptions for them.
Yep, +1.
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