prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000080))
r0 = memfd_create(&(0x7f0000000000)=':^/\x00', 0x0)
fcntl$addseals(r0, 0x40a, 0x0)