r0 = openat$tcp_mem(0xffffffffffffff9c, &(0x7f0000000180)='/proc/sys/net/ipv4/tcp_wmem\x00', 0x1, 0x0)
r1 = syz_open_dev$tty20(0xc, 0x4, 0x1)
tee(r0, r1, 0x8000, 0x0)