linux-kernel - Re: [linus:master] [x86/sme] 48204aba80: BUG:kernel_failed_in_early-boot_stage,last_printk:Booting_the_kernel(entry

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Message-ID: <CAMj1kXHYur1KVumT-n-8gF0jxBN606dwSHxk6fHCsrTYE+2mrg@mail.gmail.com>
Date: Thu, 28 Mar 2024 08:54:38 +0200
From: Ard Biesheuvel <ardb@...nel.org>
To: Oliver Sang <oliver.sang@...el.com>
Cc: Borislav Petkov <bp@...en8.de>, oe-lkp@...ts.linux.dev, lkp@...el.com, 
	linux-kernel@...r.kernel.org, Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [linus:master] [x86/sme] 48204aba80: BUG:kernel_failed_in_early-boot_stage,last_printk:Booting_the_kernel(entry_offset:#)

On Thu, 28 Mar 2024 at 07:57, Oliver Sang <oliver.sang@...el.com> wrote:
>
..
> regarding this early-boot failure issue, by more tests, we double it may
> relate with 3 configs. as we shared in [1], they are set as below when the
> kernel run into early-boot failure:
>
> # CONFIG_INIT_STACK_NONE is not set
> CONFIG_INIT_STACK_ALL_ZERO=y
> CONFIG_GCC_PLUGIN_STACKLEAK=y
>
>
> the early-boot failure issue will _disappear_ by making either one of two
> changes:
>
> (1)
>  CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y
> -# CONFIG_INIT_STACK_NONE is not set
> +CONFIG_INIT_STACK_NONE=y
>  # CONFIG_INIT_STACK_ALL_PATTERN is not set
> -CONFIG_INIT_STACK_ALL_ZERO=y
> +# CONFIG_INIT_STACK_ALL_ZERO is not set
>  CONFIG_GCC_PLUGIN_STACKLEAK=y
>
>
> (2)
>  CONFIG_INIT_STACK_ALL_ZERO=y
> -CONFIG_GCC_PLUGIN_STACKLEAK=y
> -# CONFIG_GCC_PLUGIN_STACKLEAK_VERBOSE is not set
> -CONFIG_STACKLEAK_TRACK_MIN_SIZE=100
> -# CONFIG_STACKLEAK_METRICS is not set
> -# CONFIG_STACKLEAK_RUNTIME_DISABLE is not set
> +# CONFIG_GCC_PLUGIN_STACKLEAK is not set
>  CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y
>

Thanks, this was very useful in narrowing it down. I sent out a fix
for the stackleak plugin.