[PATCH] arm64: bpf: Fix branch offset in JIT
ilias.apalodimas at linaro.org
Mon Sep 14 13:02:05 EDT 2020
On Mon, Sep 14, 2020 at 06:12:34PM +0200, Jesper Dangaard Brouer wrote:
> On Mon, 14 Sep 2020 15:01:15 +0100 Will Deacon <will at kernel.org> wrote:
> > Hi Ilias,
> > On Mon, Sep 14, 2020 at 04:23:50PM +0300, Ilias Apalodimas wrote:
> > > On Mon, Sep 14, 2020 at 03:35:04PM +0300, Ilias Apalodimas wrote:
> > > > On Mon, Sep 14, 2020 at 01:20:43PM +0100, Will Deacon wrote:
> > > > > On Mon, Sep 14, 2020 at 11:36:21AM +0300, Ilias Apalodimas wrote:
> > > > > > Running the eBPF test_verifier leads to random errors looking like this:
> > [...]
> > > >
> > > Any suggestion on any Fixes I should apply? The original code was 'correct' and
> > > broke only when bounded loops and their self-tests were introduced.
> > Ouch, that's pretty bad as it means nobody is regression testing BPF on
> > arm64 with mainline. Damn.
> Yes, it unfortunately seems that upstream is lacking BPF regression
> testing for ARM64 :-(
> This bug surfaced when Red Hat QA tested our kernel backports, on
> different archs.
Naresh from Linaro reported it during his tests on 5.8-rc1 as well .
I've included both Jiri and him on the v2 as reporters.
> Best regards,
> Jesper Dangaard Brouer
> MSc.CS, Principal Kernel Engineer at Red Hat
> LinkedIn: http://www.linkedin.com/in/brouer
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