r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x882c2, 0x0)
mmap(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x0, 0x1f012, r1, 0x0)
setsockopt$inet6_MRT6_DEL_MFC_PROXY(r0, 0x29, 0xd3, &(0x7f0000000180)={{0xa, 0x0, 0x0, @remote}, {0xa, 0x0, 0x0, @mcast1}}, 0x5c)