linux-kernel - Re: [syzbot] upstream build error (23)

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Message-ID: <20250729142512.GBaIjZyNHliBrvMFlo@fat_crate.local>
Date: Tue, 29 Jul 2025 16:25:12 +0200
From: Borislav Petkov <bp@...en8.de>
To: syzbot <syzbot+5245cb609175fb6e8122@...kaller.appspotmail.com>,
	Ard Biesheuvel <ardb@...nel.org>
Cc: dave.hansen@...ux.intel.com, hpa@...or.com,
	linux-kernel@...r.kernel.org, mingo@...hat.com,
	syzkaller-bugs@...glegroups.com, tglx@...utronix.de, x86@...nel.org
Subject: Re: [syzbot] upstream build error (23)

+ Ard.

On Tue, Jul 29, 2025 at 06:43:32AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    86aa72182095 Merge tag 'chrome-platform-v6.17' of git://gi..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=171674a2580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=3816ffa0a2bab886
> dashboard link: https://syzkaller.appspot.com/bug?extid=5245cb609175fb6e8122
> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+5245cb609175fb6e8122@...kaller.appspotmail.com
> 
> arch/x86/kernel/setup.c:1251: undefined reference to `efi_mem_type'
> ld: arch/x86/kernel/setup.c:987: undefined reference to `efi_init'
> ld: arch/x86/kernel/setup.c:971: undefined reference to `efi_memblock_x86_reserve_range'
> arch/x86/kernel/cpu/mshyperv.c:496: undefined reference to `isolation_type_tdx'
> ld: arch/x86/kernel/cpu/mshyperv.c:494: undefined reference to `isolation_type_snp'
> arch/x86/kernel/kvm.c:600: undefined reference to `efi'
> ld: arch/x86/kernel/kvm.c:600: undefined reference to `efi'
> drivers/acpi/osl.c:210: undefined reference to `efi'
> ld: drivers/acpi/osl.c:210: undefined reference to `efi'

# CONFIG_EFI is not set

If that's a random config, why do we care?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette