Subject: Re: [PATCHv2] net: bpf: reject invalid shifts

From: Daniel Borkmann <[email-masked]>
Date: Tue, 12 Jan 2016 20:35:19 +0100

On 01/12/2016 08:17 PM, Rabin Vincent wrote:
> On ARM64, a BUG() is triggered in the eBPF JIT if a filter with a
> constant shift that can't be encoded in the immediate field of the
> UBFM/SBFM instructions is passed to the JIT.  Since these shifts
> amounts, which are negative or >= regsize, are invalid, reject them in
> the eBPF verifier and the classic BPF filter checker, for all
> architectures.
>
> Signed-off-by: Rabin Vincent <[email-masked]>

Fine with me as well, thanks for following up!

Acked-by: Daniel Borkmann <[email-masked]>