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Description of problem:
classify.c:int find_class(struct interrupt *irq, char *moduletext)
{
        ...
        /* Or biosdevname? */
        netdev = malloc(strlen(moduletext));
                        ^^^^^^^^^^^^^^^^^^

strlen does not include terminator

        if (netdev) {
                strcpy(netdev, moduletext);
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^

strcpy does include terminator, oops

                 c = netdev;
                 while (*c && (isalnum(*c) || *c == '_')) {
                        c++;
                 }
                 /* Cut possible name suffix */
                 *c = '\0';
                 is_netdev = dev_to_bus(netdev, busname);
                 if (!is_netdev)
                        guess = IRQ_ETH;
                 free(netdev);
                 ^^^^^^^^^^^^^

libc gets very upset about corrupt memory here
        }

Fix is a simple +1 on the malloc

Version-Release number of selected component (if applicable):
irqbalance-0.55-34.el6.x86_64

How reproducible:
100%


Steps to Reproduce:
1. run kvm device assignment, irqbalance in the host bombs
2.
3.
  
Actual results:
segfault

Expected results:
works

Additional info:

Closing as duplicate of #843379.

John, I'll paste your last comment there.

*** This bug has been marked as a duplicate of bug 843379 ***