linux-kernel - Re: v6.14-12245-g91e5bfe317d8: Boot regression: rk3399-rock-pi-4b dragonboard-410c dragonboard-845c no console output

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Message-ID: <20250412014519.GA1905363@ax162>
Date: Fri, 11 Apr 2025 20:45:19 -0500
From: Nathan Chancellor <nathan@...nel.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: open list <linux-kernel@...r.kernel.org>,
	Linux ARM <linux-arm-kernel@...ts.infradead.org>,
	lkft-triage@...ts.linaro.org,
	Linux Regressions <regressions@...ts.linux.dev>,
	clang-built-linux <llvm@...ts.linux.dev>,
	Arnd Bergmann <arnd@...db.de>, Ard Biesheuvel <ardb@...nel.org>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	Anders Roxell <anders.roxell@...aro.org>,
	Kees Cook <keescook@...omium.org>
Subject: Re: v6.14-12245-g91e5bfe317d8: Boot regression: rk3399-rock-pi-4b
 dragonboard-410c dragonboard-845c no console output

Hi Naresh,

On Fri, Apr 11, 2025 at 12:49:17AM +0530, Naresh Kamboju wrote:
> clang-nightly boot failed with stable-rc 6.12, 6.13 and 6.14 and
> mainline and next on following devices and virtual platforms.
> - dragonboard-410c
> - dragonboard-845c
> - rk3399-rock-pi-4b
> - Juno-r2
> - e850-96
> - FVP (Fast Models Fixed Virtual Platforms)
> 
> Boot Test links,
> - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.23-2-g8e0839d16957/testrun/28076019/suite/boot/test/clang-nightly-lkftconfig-kselftest/history/
> - https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.23-2-g8e0839d16957/testrun/28076006/suite/boot/test/clang-nightly-lkftconfig-lto-thing/history/
> -  https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.23-2-g8e0839d16957/testrun/28076009/suite/boot/test/clang-nightly-lkftconfig-hardening/history/

Thanks again for confirming. As this is reproducible with the FVP, I was
able to cobble together how to boot it locally with tuxrun and your
configuration (which felt rather convoluted to get from the website
above) and use that to bisect LLVM:

https://github.com/ClangBuiltLinux/linux/issues/2082

I will continue to look into this next week.

Cheers,
Nathan