linux-kernel - Re: [REGRESSION] Kernel booted via kexec fails to resume from hibernation

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Message-Id: <20250113151749.b687c35e9f4c6d596449f433@linux-foundation.org>
Date: Mon, 13 Jan 2025 15:17:49 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Roberto Ricci <io@...icci.it>
Cc: ebiederm@...ssion.com, rafael@...nel.org, pavel@....cz,
 ytcoode@...il.com, kexec@...ts.infradead.org, linux-pm@...r.kernel.org,
 regressions@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [REGRESSION] Kernel booted via kexec fails to resume from
 hibernation

On Mon, 13 Jan 2025 22:28:44 +0100 Roberto Ricci <io@...icci.it> wrote:

> After rebooting the system via kexec, hibernating and rebooting the machine, this oops occurs:
> 
> ...
>
> # kexec -l /boot/vmlinuz-6.13.0-rc7 --initrd=/boot/initramfs-6.13.0-rc7 --reuse-cmdline
> # reboot
> # printf reboot >/sys/power/disk
> # printf disk >/sys/power/state
> ```
> 
> If kexec is not used, hibernation works fine.
> 
> This started happening since the 6.8 series; 6.7 works fine.
> I performed a bisection and it pointed to
> 18d565ea95fe ("kexec_file: fix incorrect temp_start value in locate_mem_hole_top_down()").
> 
> #regzbot introduced: 18d565ea95fe553f442c5bbc5050415bab3c3fa4
> 
> I will send the kernel config and dmesg in replies to this email.

Thanks.  Are you able to confirm that reverting 18d565ea95fe fixes things?