On 07/11/2017 08:03 PM, Kirill A. Shutemov wrote: > On Tue, Jul 11, 2017 at 07:45:48PM +0300, Andrey Ryabinin wrote: >> On 07/11/2017 06:15 PM, Andrey Ryabinin wrote: >>> >>> I reproduced this, and this is kasan bug: >>> >>> │0xffffffff84864897 <x86_early_init_platform_quirks+5> mov $0xffffffff83f1d0b8,%rdi >>> │0xffffffff8486489e <x86_early_init_platform_quirks+12> movabs $0xdffffc0000000000,%rax >>> │0xffffffff848648a8 <x86_early_init_platform_quirks+22> push %rbp >>> │0xffffffff848648a9 <x86_early_init_platform_quirks+23> mov %rdi,%rdx >>> │0xffffffff848648ac <x86_early_init_platform_quirks+26> shr $0x3,%rdx >>> │0xffffffff848648b0 <x86_early_init_platform_quirks+30> mov %rsp,%rbp >>> >│0xffffffff848648b3 <x86_early_init_platform_quirks+33> mov (%rdx,%rax,1),%al >>> >>> we crash on the last move which is a read from shadow >> >> >> Ughh, I forgot about phys_base. > > Thanks! Works for me. > > Can use your Signed-off-by for a [cleaned up version of your] patch? Sure.
