ipv6: fix crash on ICMPv6 redirects with prohibited/blackholed source
authorMatthias Schiffer <mschiffer@universe-factory.net>
Mon, 2 Nov 2015 00:24:38 +0000 (01:24 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 2 Nov 2015 21:30:15 +0000 (16:30 -0500)
commitec13ad1d705c9990d55ed8ab21946cef323d30c7
tree5f94fdc89dc73c44e1ef5276cae696c9d7d69e9b
parent4ab42d78e37a294ac7bc56901d563c642e03c4ae
ipv6: fix crash on ICMPv6 redirects with prohibited/blackholed source

There are other error values besides ip6_null_entry that can be returned by
ip6_route_redirect(): fib6_rule_action() can also result in
ip6_blk_hole_entry and ip6_prohibit_entry if such ip rules are installed.

Only checking for ip6_null_entry in rt6_do_redirect() causes ip6_ins_rt()
to be called with rt->rt6i_table == NULL in these cases, making the kernel
crash.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/route.c