From: David Ahern <[email protected]> Date: Wed, 1 Mar 2017 15:03:45 -0800
> On 2/27/17 4:07 PM, Cong Wang wrote: >> Andrey reported a NULL pointer deref bug in ipv6_route_ioctl() >> -> ip6_route_del() -> __ip6_del_rt_siblings() code path. This is >> because ip6_null_entry is returned in this path since ip6_null_entry >> is kinda default for a ipv6 route table root node. Quote from >> David Ahern: >> >> ip6_null_entry is the root of all ipv6 fib tables making it integrated >> into the table ... >> >> We should ignore any attempt of trying to delete it, like we do in >> __ip6_del_rt() path and several others. >> >> Reported-by: Andrey Konovalov <[email protected]> >> Fixes: 0ae8133586ad ("net: ipv6: Allow shorthand delete of all nexthops in >> multipath route") >> Cc: David Ahern <[email protected]> >> Cc: Eric Dumazet <[email protected]> >> Signed-off-by: Cong Wang <[email protected]> >> --- >> net/ipv6/route.c | 14 +++++++++----- >> 1 file changed, 9 insertions(+), 5 deletions(-) > > > Acked-by: David Ahern <[email protected]> Applied, thanks.
