diff --git a/arch/x86/kernel/cfi.c b/arch/x86/kernel/cfi.c index 1df26dfdce08..8e5c4ed264a0 100644 --- a/arch/x86/kernel/cfi.c +++ b/arch/x86/kernel/cfi.c @@ -10,11 +10,11 @@ #include /* - * Returns the target address and the expected type when regs->ip points + * Returns the target address and the expected type when addr points * to a compiler-generated CFI trap. */ -static bool decode_cfi_insn(struct pt_regs *regs, unsigned long *target, - u32 *type) +static bool decode_cfi_insn(struct pt_regs *regs, unsigned long addr, + unsigned long *target, u32 *type) { char buffer[MAX_INSN_SIZE]; struct insn insn; @@ -29,13 +29,13 @@ static bool decode_cfi_insn(struct pt_regs *regs, unsigned long *target, *   movl -, %r10d ; 6 bytes * addl -(%reg), %r10d; 4 bytes * je .Ltmp1 ; 2 bytes - * ud2 ; <- regs->ip + * ud2 ; <- addr * .Ltmp1: * * We can decode the expected type and the target address from the * movl/addl instructions. */ - if (copy_from_kernel_nofault(buffer, (void *)regs->ip - 12, MAX_INSN_SIZE)) + if (copy_from_kernel_nofault(buffer, (void *)addr - 12, MAX_INSN_SIZE)) return false; if (insn_decode_kernel(&insn, &buffer[offset])) return false; @@ -44,7 +44,7 @@ static bool decode_cfi_insn(struct pt_regs *regs, unsigned long *target, *type = -(u32)insn.immediate.value; - if (copy_from_kernel_nofault(buffer, (void *)regs->ip - 6, MAX_INSN_SIZE)) + if (copy_from_kernel_nofault(buffer, (void *)addr - 6, MAX_INSN_SIZE)) return false; if (insn_decode_kernel(&insn, &buffer[offset])) return false; @@ -82,7 +82,7 @@ enum bug_trap_type handle_cfi_failure(struct pt_regs *regs) return BUG_TRAP_TYPE_NONE; } - if (!decode_cfi_insn(regs, &target, &type)) + if (!decode_cfi_insn(regs, addr, &target, &type)) return report_cfi_failure_noaddr(regs, addr); break;