llvm-project/clang-tools-extra/docs/clang-tidy/checks/android-cloexec-memfd-creat...

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.. title:: clang-tidy - android-cloexec-memfd-create
android-cloexec-memfd-create
============================
``memfd_create()`` should include ``MFD_CLOEXEC`` in its type argument to avoid
the file descriptor leakage. Without this flag, an opened sensitive file would
remain open across a fork+exec to a lower-privileged SELinux domain.
Examples:
.. code-block:: c++
memfd_create(name, MFD_ALLOW_SEALING);
// becomes
memfd_create(name, MFD_ALLOW_SEALING | MFD_CLOEXEC);