r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000080)='/proc/vmallocinfo\x00', 0x0, 0x0)
sendfile(0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0x0)
sendfile(r0, r1, &(0x7f0000000000)=0x9, 0x2000000000000000)