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:

memfd_create(name, MFD_ALLOW_SEALING);

// becomes

memfd_create(name, MFD_ALLOW_SEALING | MFD_CLOEXEC);