linux-kernel - Re: FVP: kernel BUG at arch/arm64/kernel/traps.c:497 - Internal error: Oops

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Message-ID: <YtAU1AHLLgK/v7RP@FVFF77S0Q05N.cambridge.arm.com>
Date:   Thu, 14 Jul 2022 14:06:28 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        lkft-triage@...ts.linaro.org, regressions@...ts.linux.dev,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Anders Roxell <anders.roxell@...aro.org>,
        Aishwarya TCV <Aishwarya.TCV@....com>
Subject: Re: FVP: kernel BUG at arch/arm64/kernel/traps.c:497 - Internal
 error: Oops - BUG: 0

On Thu, Jul 14, 2022 at 01:57:50PM +0100, Mark Rutland wrote:
> On Thu, Jul 14, 2022 at 12:42:08PM +0100, Mark Brown wrote:
> > On Thu, Jul 14, 2022 at 12:26:05PM +0100, Mark Rutland wrote:
> > 
> > > I note that your log has:
> > 
> > > | Hit any key to stop autoboot:  1  0 
> > > | smh_open: ERROR fd -1 for file 'boot.img'
> > > | smh_open: ERROR fd -1 for file 'Image'
> > > | smh_open: ERROR fd -1 for file 'devtree.dtb'
> > > | smh_open: ERROR fd -1 for file 'ramdisk.img'
> > 
> > ...
> > 
> > > | Hit any key to stop autoboot:  0   
> > > | smh_open: ERROR fd -1 for file 'boot.img'
> > > | loaded file Image from 80080000 to 82F299FF, 02EA9A00 bytes
> > > | smh_open: ERROR fd -1 for file 'devtree.dtb'
> > > | smh_open: ERROR fd -1 for file 'ramdisk.img'
> > > | fdt - flattened device tree utility commands
> > 
> > > ... and I wonder if that has something to do with it, given it appears that
> > > your Image is corrupted somehow.
> > 
> > Naresh's command line is putting Image directly into RAM with
> > 
> >     --data cluster0.cpu0=/tuxrun-r4_1075p-lava-1/Image@...0080000
> 
> Likewise in mine:
> 
> 	--data cluster0.cpu0=/mnt/data/models/fvp/naresh/Image@...0080000
> 
> ... as I'm using the same command line, just with paths altered.

... and I've just reproduced the issue by running the script from a different
directory, since apprarently the semihosting interface just grabs the file from
the current directory.

I'm pretty sure this means that *something* is clobbering the Image early on
during boot, and the semihisting loading happens to refresh it.

Thanks,
Mark.