F_SEAL_SHRINK
if ((mfd->mfd_seals & F_SEAL_SHRINK) && length < mfd->mfd_size)
#define MFD_KNOWN_SEALS (F_SEAL_SEAL|F_SEAL_SHRINK|F_SEAL_GROW \
if (except & ~F_SEAL_SHRINK) {
RL(fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK));
test_all_seals_except(fd, F_SEAL_SHRINK);
seal_yet = p_memfd_seal(seal_yet, mfd.mfd_seals, F_SEAL_SHRINK, "F_SEAL_SHRINK");