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  1. RHEL
  2. RHEL-47403

glibc: ld.so asserts when library is loaded within audit library and application [rhel-9]

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    • glibc-2.34-212.el9
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    • rhel-pt-c-libs
    • ssg_platform_tools
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    • False
    • Yes
    • Red Hat Enterprise Linux
    • PT Libraries 2025 S09
    • Bug Fix
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      .Improved support for recursive `dlopen` calls in audit modules in `glibc`

      Previously, recursive ‎`dlopen` calls from auditors could trigger an ‎`r_state == RT_CONSISTENT` assertion failure in glibc’s ‎`dl-open.c`. As a consequence, applications exited unexpectedly when auditors were active. With this update, the dynamic linker reports consistency of its internal data structures earlier during an in-progress ‎`dlopen` call. As a result, recursive ‎`dlopen` operations for auditors are supported in more cases.
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      .Improved support for recursive `dlopen` calls in audit modules in `glibc` Previously, recursive ‎`dlopen` calls from auditors could trigger an ‎`r_state == RT_CONSISTENT` assertion failure in glibc’s ‎`dl-open.c`. As a consequence, applications exited unexpectedly when auditors were active. With this update, the dynamic linker reports consistency of its internal data structures earlier during an in-progress ‎`dlopen` call. As a result, recursive ‎`dlopen` operations for auditors are supported in more cases.
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      What were you trying to do that didn't work?
          When a library is loaded within both an audit library and a application, ld.so catches an assertion and crashes.
      Please provide the package NVR for which bug is seen:
          glibc-2.34-100.el9_4.2.x86_64
          glibc-common-2.34-100.el9_4.2.x86_64
      How reproducible:
          This behavior is consistently reproducible.
      Steps to reproduce
          1. Unpack reproducer tarball archive.
          2. Run make
          3. Observe behavior
      Expected results
          ld.so does not catch assertion and crash
      Actual results
          ld.so catches assertion and crashes.

      NOTE: This behavior has also been observed in the upstream Fedora distribution as well, a bug listing has already been filed for this.

        1. recursive-dlopen-crashes.tar.gz
          3 kB

              skolosov@redhat.com Sergey Kolosov
              brclark@redhat.com Brandon Clark
              Brandon Clark
              Florian Weimer Florian Weimer
              Sergey Kolosov Sergey Kolosov
              Malhar Jivrajani Malhar Jivrajani
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                Created:
                Updated: