From: Andy Lutomirski Date: Wed, 10 Feb 2021 02:33:44 +0000 (-0800) Subject: x86/fault: Don't look for extable entries for SMEP violations X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=66fcd98883816dba3b66da20b5fc86fa410638b5;p=linux.git x86/fault: Don't look for extable entries for SMEP violations If the kernel gets a SMEP violation or a fault that would have been a SMEP violation if it had SMEP support, it shouldn't run fixups. Just OOPS. [ bp: Massage commit message. ] Signed-off-by: Andy Lutomirski Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/46160d8babce2abf1d6daa052146002efa24ac56.1612924255.git.luto@kernel.org --- diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 3566a594e2922..1a0cfede88220 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -1250,12 +1250,12 @@ void do_user_addr_fault(struct pt_regs *regs, * user memory. Unless this is AMD erratum #93, which * corrupts RIP such that it looks like a user address, * this is unrecoverable. Don't even try to look up the - * VMA. + * VMA or look for extable entries. */ if (is_errata93(regs, address)) return; - bad_area_nosemaphore(regs, error_code, address); + page_fault_oops(regs, error_code, address); return; }