Memory leak when dlopen() selinux

Solution Unverified - Updated -

Issue

  • The issue is observed when our product dlopen() libselinux on RedHat 5.x/6.x
  • We have confirmed the memory leak after dlopen() using valgrind, see below:
==11099== 1,288 bytes in 8 blocks are definitely lost in loss record 5,740 of 5,870
==11099==    at 0x4A04820: memalign (vg_replace_malloc.c:581)
==11099==    by 0x3BB9C1104F: tls_get_addr_tail (in /lib64/ld-2.12.so)
==11099==    by 0x3BB9C1151F: __tls_get_addr (in /lib64/ld-2.12.so)
==11099==    by 0x3BBBC14333: selinux_raw_to_trans_context (in /lib64/libselinux.so.1)
==11099==    by 0x3BBBC0CA79: getfilecon (in /lib64/libselinux.so.1)
==11099==    by 0x56F0B5B: cims::SELinuxModule::getfilecon(char const*, char**) (selinux_context.cpp:63)
==11099==    by 0x56F021D: cims::RestoreFileSELinuxLabel(std::string const&) (selinux_context.cpp:267)
==11099==    by 0x56B3990: renameFile(std::string, std::string) (file_util.cpp:134)
...
  • We believe this is related to a bug in glibc (see http://sourceware.org/bugzilla/show_bug.cgi?id=12650 )

Environment

  • Red Hat Enterprise Linux 5/6

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