Messages in this thread Patch in this message | | | From | Cong Wang <> | Date | Wed, 19 Apr 2017 16:47:21 -0700 | Subject | Re: net: heap out-of-bounds in fib6_clean_node/rt6_fill_node/fib6_age/fib6_prune_clone |
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On Wed, Apr 19, 2017 at 9:12 AM, Andrey Konovalov <andreyknvl@google.com> wrote: > > Anyway, I just finished simplifying the reproducer. Give this one a try.
Thanks for providing such a minimal reproducer!
The following patch could fix this crash, but I am not 100% sure if we should just clear these bits or reject them with an errno.
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 9db14189..cf524c2 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2086,7 +2086,7 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg) } else rt->rt6i_prefsrc.plen = 0;
- rt->rt6i_flags = cfg->fc_flags; + rt->rt6i_flags = cfg->fc_flags & ~(RTF_PCPU | RTF_CACHE);
install_route: rt->dst.dev = dev;
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