linux-kernel - Re: [PATCH 4.19 026/287] selftests/bpf: Fix "dubious pointer arithmetic" test

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Date:   Tue, 23 Aug 2022 13:12:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        John Fastabend <john.fastabend@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Ovidiu Panait <ovidiu.panait@...driver.com>
Subject: Re: [PATCH 4.19 026/287] selftests/bpf: Fix "dubious pointer
 arithmetic" test

On Tue, Aug 23, 2022 at 10:58:10AM +0100, Jean-Philippe Brucker wrote:
> Hi,
> 
> On Tue, Aug 23, 2022 at 10:23:15AM +0200, Greg Kroah-Hartman wrote:
> > From: Ovidiu Panait <ovidiu.panait@...driver.com>
> > 
> > From: Jean-Philippe Brucker <jean-philippe@...aro.org>
> > 
> > commit 3615bdf6d9b19db12b1589861609b4f1c6a8d303 upstream.
> 
> This shouldn't be backported to 4.19, because it adjusts the selftest due
> to commit b02709587ea3 ("bpf: Fix propagation of 32-bit signed bounds from
> 64-bit bounds."), which wasn't backported further than 5.9.
> 
> See [1] for the report about these BPF backports to v5.4, which we are
> still trying to unravel. Given how painful building the BPF tests used to
> be even on 5.4, I'd rather not do the same on 4.19!
> 
> [1] https://lore.kernel.org/lkml/CAPXMrf-C5XEUfOJd3GCtgtHOkc8DxDGbLxE5=GFmr+Py0zKxJA@mail.gmail.com/

Thanks for letting me know, I've now dropped this from the 4.19-rc
queue.

Ovidiu, please work on fixing this up in a way that everyone can agree
on.

thanks,

greg k-h