Why do I get sporadic crashes with some applications in Red Hat Enterprise Linux when the MALLOC_CHECK_ environment variable is set?

Solution Verified - Updated -

Issue

  • I receive sporadic crashes with some applications in Red Hat Enterprise Linux (RHEL) 5.4 or 5.5 when the MALLOC_CHECK_ environment variable is set
  • SIGSEGV occurs when freeing memory with checking free() with MALLOC_CHECK_.
    # MALLOC_CHECK_=3 ./malloc_test
    malloc: using debugging hooks
    Segmentation fault
    

Environment

  • Red Hat Enterprise Linux 5.4

  • Red Hat Enterprise Linux 5.5

  • MALLOC_CHECK_ environment variable is  set

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