Re: [syzbot] UBSAN: shift-out-of-bounds in xfrm_get_default

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

arch/x86/kernel/setup.c:916:6: error: implicit declaration of function 'acpi_mps_check' [-Werror=implicit-function-declaration]
arch/x86/kernel/setup.c:1110:2: error: implicit declaration of function 'acpi_table_upgrade' [-Werror=implicit-function-declaration]
arch/x86/kernel/setup.c:1112:2: error: implicit declaration of function 'acpi_boot_table_init' [-Werror=implicit-function-declaration]
arch/x86/kernel/setup.c:1120:2: error: implicit declaration of function 'early_acpi_boot_init'; did you mean 'early_cpu_init'? [-Werror=implicit-function-declaration]
arch/x86/kernel/setup.c:1162:2: error: implicit declaration of function 'acpi_boot_init' [-Werror=implicit-function-declaration]


Tested on:

commit:         9e9fb765 Merge tag 'net-next-5.15' of git://git.kernel..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git master
dashboard link: https://syzkaller.appspot.com/bug?extid=b2be9dd8ca6f6c73ee2d
compiler:       
patch:          https://syzkaller.appspot.com/x/patch.diff?x=14a2a34d300000