prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000001b00))
r0 = openat$zero(0xffffffffffffff9c, &(0x7f0000001ec0), 0x0, 0x0)
readv(r0, 0x0, 0x0)