linux-kernel - Re: Bug 215734 - shared object loaded very low in memory ARM 32bit with kernel 5.17.0

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Message-Id: <20220409151710.2aa22be82ce554e779c42744@linux-foundation.org>
Date:   Sat, 9 Apr 2022 15:17:10 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Thorsten Leemhuis <regressions@...mhuis.info>
Cc:     "H.J. Lu" <hjl.tools@...il.com>,
        "regressions@...ts.linux.dev" <regressions@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Chris Kennelly <ckennelly@...gle.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Song Liu <songliubraving@...com>,
        David Rientjes <rientjes@...gle.com>,
        Ian Rogers <irogers@...gle.com>,
        Hugh Dickins <hughd@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Sandeep Patil <sspatil@...gle.com>,
        Fangrui Song <maskray@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: Bug 215734 - shared object loaded very low in memory ARM 32bit
 with kernel 5.17.0

On Sat, 9 Apr 2022 13:52:17 +0200 Thorsten Leemhuis <regressions@...mhuis.info> wrote:

> Hi, this is your Linux kernel regression tracker. Top-posting for once,
> to make this easily accessible to everyone.
> 
> Hey, what's up here? Was this regressions fixed already?

I didn't know about these post-Mike regressions.

> H.J. Lu: reminder, this is caused by a patch of yours. One that causes
> two regressions I track, and it seem neither is getting addressed with
> the appropriate urgency. FWIW, the other regression can can be found here:
> https://lore.kernel.org/lkml/cb5b81bd-9882-e5dc-cd22-54bdbaaefbbc@leemhuis.info/
> https://bugzilla.kernel.org/show_bug.cgi?id=215720
> 
> Mike, if you have a minute: '925346c129da' ("fs/binfmt_elf: fix PT_LOAD
> p_align values for loaders") in 'next' contains a 'Fixes:' tag for the
> culprit of this regression, but I assume it fixes a different issue?

I'm assuming Mike's fix was indeed targeted at these regressions and
presumably only partly fixed them.

Thanks.  I have queued reverts for both Mike's fix (925346c129da117)
and for the original patch (9630f0d60fec5fb).  Both reversions have
cc:stable.

I'll hold onto these reversions for a week or so before sending them
upstream, if they are still needed.