r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000000)='net/tcp6\x00')
preadv2(r0, &(0x7f00000012c0)=[{&(0x7f00000001c0)=""/234, 0xea}], 0x1, 0x0, 0x0, 0x5)