tree 766e3dffc0e878bf07e4d9a4aa0b25b19d8e2785
parent a3c960899e042bc1c2b730a2115fa32da7802039
author Thomas Graf <tgraf@suug.ch> 1211986462 +0200
committer YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> 1212606151 +0900

[IPV6] ADDRCONF: Check range of prefix length

As of now, the prefix length is not vaildated when adding or deleting
addresses. The value is passed directly into the inet6_ifaddr structure
and later passed on to memcmp() as length indicator which relies on
the value never to exceed 128 (bits).

Due to the missing check, the currently code allows for any 8 bit
value to be passed on as prefix length while using the netlink
interface, and any 32 bit value while using the ioctl interface.

[Use unsigned int instead to generate better code - yoshfuji]

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>