[PATCH] kprobes: bad manipulation of 2 byte opcode on x86_64

[powerpc.git] / arch / x86_64 / kernel / kprobes.c

diff --git a/arch/x86_64/kernel/kprobes.c b/arch/x86_64/kernel/kprobes.c
index 1eaa5da..fa1d19c 100644 (file)
--- a/arch/x86_64/kernel/kprobes.c
+++ b/arch/x86_64/kernel/kprobes.c
@@ -514,13 +514,13 @@ static void __kprobes resume_execution(struct kprobe *p,
                *tos = orig_rip + (*tos - copy_rip);
                break;
        case 0xff:
-               if ((*insn & 0x30) == 0x10) {
+               if ((insn[1] & 0x30) == 0x10) {
                        /* call absolute, indirect */
                        /* Fix return addr; rip is correct. */
                        next_rip = regs->rip;
                        *tos = orig_rip + (*tos - copy_rip);
-               } else if (((*insn & 0x31) == 0x20) ||  /* jmp near, absolute indirect */
-                          ((*insn & 0x31) == 0x21)) {  /* jmp far, absolute indirect */
+               } else if (((insn[1] & 0x31) == 0x20) ||        /* jmp near, absolute indirect */
+                          ((insn[1] & 0x31) == 0x21)) {        /* jmp far, absolute indirect */
                        /* rip is correct. */
                        next_rip = regs->rip;
                }