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[libvirt] Crash while using virConnectRef



All,
     I've been doing some testing of the virConnectRef() function, and as far as
I can tell, it's busted.  Here's the simple example program I'm using:

#include <stdio.h>
#include <stdlib.h>
#include <libvirt/libvirt.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
  virConnectPtr conn;

  conn = virConnectOpen(NULL);
  printf("type is %s\n",virConnectGetType(conn));
  virConnectRef(conn);
  virConnectClose(conn);
  virConnectClose(conn);
  return 0;
}

When compiling and running this program, I get a segfault during the *second*
virConnectClose().  The crash comes in the remote_internal driver, because the
first virConnectClose() actually freed up the remote_internal private memory,
and now the second one comes along and accesses a NULL pointer.  I think this
actually points to a bug in virConnectClose(); we shouldn't be running the
->close() callbacks on the drivers until we are going to be really closing up
the driver, i.e. we should move all of the ->close() callbacks into
virUnrefConnect().  Is that the right way to fix this?

-- 
Chris Lalancette


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