r0 = getpgrp(0xffffffffffffffff)
r1 = fork()
ptrace(0x10, r1)
ptrace$getregset(0x4204, r1, 0x2, &(0x7f0000000040)={&(0x7f0000000080)=""/4102, 0x1006})
pidfd_open(r1, 0x0)
waitid(0x1, r0, 0x0, 0x40000000, &(0x7f00000010c0))
getsockopt$EBT_SO_GET_ENTRIES(0xffffffffffffffff, 0x0, 0x50, 0x0, &(0x7f0000000000)=0x41)