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Date:   Sat, 25 May 2019 10:54:49 +1000 (AEST)
From:   Michael Ellerman <>
To:     Thiago Jung Bauermann <>,
        Mimi Zohar <>,
        AKASHI Takahiro <>,
        Thiago Jung Bauermann <>
Subject: Re: [PATCH] powerpc: Fix loading of kernel + initramfs with kexec_file_load()

On Wed, 2019-05-22 at 22:01:58 UTC, Thiago Jung Bauermann wrote:
> Commit b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
> changed kexec_add_buffer() to skip searching for a memory location if
> kexec_buf.mem is already set, and use the address that is there.
> In powerpc code we reuse a kexec_buf variable for loading both the kernel
> and the initramfs by resetting some of the fields between those uses, but
> not mem. This causes kexec_add_buffer() to try to load the kernel at the
> same address where initramfs will be loaded, which is naturally rejected:
>   # kexec -s -l --initrd initramfs vmlinuz
>   kexec_file_load failed: Invalid argument
> Setting the mem field before every call to kexec_add_buffer() fixes this
> regression.
> Fixes: b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
> Signed-off-by: Thiago Jung Bauermann <>
> Reviewed-by: Dave Young <>

Applied to powerpc fixes, thanks.


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