Messages in this thread | | | Subject | Re: [5.2 REGRESSION] Generic vDSO breaks seccomp-enabled userspace on i386 | From | Andy Lutomirski <> | Date | Tue, 23 Jul 2019 07:04:46 -0700 |
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> On Jul 23, 2019, at 2:18 AM, Peter Zijlstra <peterz@infradead.org> wrote: > >> On Mon, Jul 22, 2019 at 04:47:36PM -0700, Andy Lutomirski wrote: >> >> I don't love this whole concept, but I also don't have a better idea. > > Are we really talking about changing the kernel because BPF is expecting > things? That is, did we just elevate everything BPF can observe to ABI? >
No, this isn’t about internals in the kernel mode sense. It’s about the smallish number of cases where the kernel causes user code to do a specific syscall and the user has a policy that doesn’t allow that syscall. This is visible to user code via seccomp and ptrace.
Yes, it’s obnoxious. Do you have any suggestions?
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