r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x882c2, 0x0)
mmap(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x0, 0x1f012, r0, 0x0)
r1 = socket$inet_tcp(0x2, 0x1, 0x0)
setsockopt$inet_MCAST_LEAVE_GROUP(r1, 0x0, 0x29, &(0x7f0000000540)={0x0, {{0x2, 0x0, @dev}}}, 0x88)