r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = socket$nl_xfrm(0x10, 0x3, 0x6)
getsockopt$sock_cred(r1, 0x1, 0x11, &(0x7f0000000000)={0x0, <r2=>0x0}, &(0x7f0000000040)=0x5)
setuid(r2)
ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f0000000040)={'vcan0\x00'})