diff options
| -rw-r--r-- | arch/x86/mm/mpx.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/x86/mm/mpx.c b/arch/x86/mm/mpx.c index f4c48a01c906..57e5bf58ea34 100644 --- a/arch/x86/mm/mpx.c +++ b/arch/x86/mm/mpx.c @@ -138,8 +138,9 @@ static int get_reg_offset(struct insn *insn, struct pt_regs *regs, */ static void __user *mpx_get_addr_ref(struct insn *insn, struct pt_regs *regs) { - unsigned long addr = -1L, base, indx; int addr_offset, base_offset, indx_offset; + unsigned long linear_addr = -1L; + long eff_addr, base, indx; insn_byte_t sib; insn_get_modrm(insn); @@ -150,7 +151,8 @@ static void __user *mpx_get_addr_ref(struct insn *insn, struct pt_regs *regs) addr_offset = get_reg_offset(insn, regs, REG_TYPE_RM); if (addr_offset < 0) goto out; - addr = regs_get_register(regs, addr_offset); + + eff_addr = regs_get_register(regs, addr_offset); } else { if (insn->sib.nbytes) { base_offset = get_reg_offset(insn, regs, REG_TYPE_BASE); @@ -163,17 +165,23 @@ static void __user *mpx_get_addr_ref(struct insn *insn, struct pt_regs *regs) base = regs_get_register(regs, base_offset); indx = regs_get_register(regs, indx_offset); - addr = base + indx * (1 << X86_SIB_SCALE(sib)); + + eff_addr = base + indx * (1 << X86_SIB_SCALE(sib)); } else { addr_offset = get_reg_offset(insn, regs, REG_TYPE_RM); if (addr_offset < 0) goto out; - addr = regs_get_register(regs, addr_offset); + + eff_addr = regs_get_register(regs, addr_offset); } - addr += insn->displacement.value; + + eff_addr += insn->displacement.value; } + + linear_addr = (unsigned long)eff_addr; + out: - return (void __user *)addr; + return (void __user *)linear_addr; } static int mpx_insn_decode(struct insn *insn, |