On Tue, 2 Jan 2018, Borislav Petkov wrote: > On Tue, Jan 02, 2018 at 10:49:16PM +0200, Meelis Roos wrote: > > This is on a socket 939 Athlon64 3500+, with PTI enabled. > > LOL. > > > [ 316.384669] mce: [Hardware Error]: Machine check events logged > > [ 316.384698] [Hardware Error]: Corrected error, no action required. > > [ 316.384719] [Hardware Error]: CPU:0 (f:2f:2) MC1_STATUS[-|CE|-|-|AddrV]: > > 0x9400000000010011 > > [ 316.384742] [Hardware Error]: Error Addr: 0x0000ffff81e000e0 > > That's the [47:12] slice of the virtual address which it tried to execute. > > According to our map in mm.txt: > > ffff800000000000 - ffff87ffffffffff (=43 bits) guard hole, reserved for > hypervisor > > vs > > ffff81e000e0... > > which makes me think: WTF now?! > > I don't see any hypervisor happening in dmesg...
Meelis, can you please enable CONFIG_X86_PTDUMP. If you select M then please load the resulting module 'debug_pagetables'. Then please do the following from a shell: # cat /sys/kernel/debug/page_tables/* >t.txt and provide the output. Thanks, tglx