OK - this all gives me some ideas to run with.

rpmlint is warning about the executable stack, but I don't think
anything is enforcing it.  Also, I expect a general protection fault
rather than a segmentation violation if the stack is not executable.

I'll check binaries here, and see if I can get a solid reproduction to
play further with.  If the stack is getting trashed for some other
reason, that will generally wreak havoc with the function pointers.

mike

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