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Date:   Mon, 13 Nov 2017 16:03:14 -0800
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Joel Stanley <joel@jms.id.au>
Cc:     Michal Hocko <mhocko@kernel.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: linux-next: Tree for Nov 7
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        <20171108142050.7w3yliulxjeco3b7@dhcp22.suse.cz>
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On Sun, 12 Nov 2017 11:38:02 +1030 Joel Stanley <joel@jms.id.au> wrote:

> On Fri, Nov 10, 2017 at 11:00 PM, Michal Hocko <mhocko@kernel.org> wrote:
> > Hi Joel,
> >
> > On Wed 08-11-17 15:20:50, Michal Hocko wrote:
> > [...]
> >> > There are a lot of messages on the way up that look like this:
> >> >
> >> > [    2.527460] Uhuuh, elf segement at 000d9000 requested but the
> >> > memory is mapped already
> >> > [    2.540160] Uhuuh, elf segement at 000d9000 requested but the
> >> > memory is mapped already
> >> > [    2.546153] Uhuuh, elf segement at 000d9000 requested but the
> >> > memory is mapped already
> >> >
> >> > And then trying to run userspace looks like this:
> >>
> >> Could you please run with debugging patch posted
> >> http://lkml.kernel.org/r/20171107102854.vylrtaodla63kc57@dhcp22.suse.cz
> >
> > Did you have chance to test with this debugging patch, please?
> 
> Lots of this:
> 
> [    1.177266] Uhuuh, elf segement at 000d9000 requested but the
> memory is mapped already, got 000dd000
> [    1.177555] Clashing vma [dd000, de000] flags:100873 name:(null)
> 
> Full log is attached.
> 
> If you want to reproduce yourself and have an arm compiler lying around:
> 
> $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make aspeed_g5_defconfig
> $ ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- make
> $ qemu-system-arm -M ast2500-evb -nographic -nodefaults -serial stdio \
>   -kernel arch/arm/boot/zImage \
>   -dtb arch/arm/boot/dts/aspeed-ast2500-evb.dtb
> 
> I'm using Qemu 2.10 which current distros ship. ymmv with older releases.

(wakes up)

Does this kernel have "fs/binfmt_elf.c: drop MAP_FIXED usage from
elf_map" applied?  That patch was dropped due to runtime issues.


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