prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000001b00))
r0 = memfd_create(&(0x7f0000000000)='(\x00', 0x0)
fstatfs(r0, &(0x7f0000000040)=""/166)