[Bug kprobes/2667] New: Kernel panic occur when kprobing callq instruction on x86_64

["soshima at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

Kernel panic occurs if we put a probe on callq instruction.
This problem always occurs when probes callq instruction.
This problem is only on x86_64.

If resume_execution() found 0xff at first byte of 
p->ainsn.insn, it must check the _second_ byte.
But current resume_execution() check _first_ byte again
in mainline.

This causes the kernel panic of Bad RIP value.

-- 
           Summary: Kernel panic occur when kprobing callq instruction on
                    x86_64
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: critical
          Priority: P2
         Component: kprobes
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: soshima at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=2667

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