tree 82140aaabeabc172e13cf5fc78d564a93acd5a0d
parent 31b0b385f69d8d5491a4bca288e25e63f1d945d0
author Paolo Abeni <pabeni@redhat.com> 1463157221 +0200
committer David S. Miller <davem@davemloft.net> 1463254412 -0400

net/route: enforce hoplimit max value

Currently, when creating or updating a route, no check is performed
in both ipv4 and ipv6 code to the hoplimit value.

The caller can i.e. set hoplimit to 256, and when such route will
 be used, packets will be sent with hoplimit/ttl equal to 0.

This commit adds checks for the RTAX_HOPLIMIT value, in both ipv4
ipv6 route code, substituting any value greater than 255 with 255.

This is consistent with what is currently done for ADVMSS and MTU
in the ipv4 code.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>