prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000001b00))
socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={<r0=>0xffffffffffffffff})
fstat(r0, &(0x7f00000000c0))