ifa_refcnt-- -> IFAFREE().  the change is important since IFAFREE() frees ifa when necessary, while ifa_refcnt-- does not.
ifa_refcnt-- -> IFAFREE().  the change is important since IFAFREE()
frees ifa when necessary, while ifa_refcnt-- does not.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame