r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x802c2, 0x0)
ftruncate(r0, 0x800)
r1 = socket$inet_udp(0x2, 0x2, 0x0)
setsockopt$inet_mtu(r1, 0x0, 0xa, &(0x7f0000000040)=0x2, 0x4)
connect$inet(r1, &(0x7f0000000000)={0x2, 0x0, @local}, 0x10)
sendfile(r1, r0, 0x0, 0x8000)