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    Subject[patch 64/88] KVM: Prevent trace call into unloaded module text

    2.6.28-stable review patch. If anyone has any objections, please let us know.

    ------------------

    From: Wu Fengguang <fengguang.wu@intel.com>

    (cherry picked from b82091824ee4970adf92d5cd6d57b12273171625)

    Add marker_synchronize_unregister() before module unloading.
    This prevents possible trace calls into unloaded module text.

    Signed-off-by: Wu Fengguang <wfg@linux.intel.com>
    Signed-off-by: Avi Kivity <avi@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    ---
    virt/kvm/kvm_trace.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/virt/kvm/kvm_trace.c
    +++ b/virt/kvm/kvm_trace.c
    @@ -252,6 +252,7 @@ void kvm_trace_cleanup(void)
    struct kvm_trace_probe *p = &kvm_trace_probes[i];
    marker_probe_unregister(p->name, p->probe_func, p);
    }
    + marker_synchronize_unregister();

    relay_close(kt->rchan);
    debugfs_remove(kt->lost_file);



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