On Tue, Sep 15, 2020 at 11:52 AM Borislav Petkov <b...@alien8.de> wrote: > > On Tue, Sep 15, 2020 at 11:36:13AM -0700, Roman Kiryanov wrote: > > This is fair. Unfortunately I am not an x86 asm expert. I expect the proper > > fix should land into arch/x86/kernel/acpi/wakeup_64.S to init %gs > > (maybe some more registers) before "jmp restore_processor_state". > > ... because "LLVM appears to be inlining functions with stack protectors > into functions compiled with -fno-stack-protector" and now the *kernel* > needs to init %gs? > > How about LLVM stops doing those wrong inlining decisions?
This will remove the issue for a while until clang/gcc/other decides to use %gs for other purposes before the kernel initializes it. Regards, Roman.
