--- run 1 ---
  SIGSEGV: handler wrote into txmsg AFTER sender kfree'd it -- use-after-free demonstrated
exit=42
--- run 2 ---
  SIGSEGV: handler wrote into txmsg AFTER sender kfree'd it -- use-after-free demonstrated
exit=42
--- run 3 ---
  SIGSEGV: handler wrote into txmsg AFTER sender kfree'd it -- use-after-free demonstrated
exit=42