Messages in this thread | | | Date | Tue, 3 Sep 2019 22:55:34 +0200 | From | Pablo Neira Ayuso <> | Subject | Re: [PATCH v4 1/2] netfilter: Terminate rule eval if protocol=IPv6 and ipv6 module is disabled |
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On Fri, Aug 30, 2019 at 03:13:53PM -0300, Leonardo Bras wrote: > If IPv6 is disabled on boot (ipv6.disable=1), but nft_fib_inet ends up > dealing with a IPv6 packet, it causes a kernel panic in > fib6_node_lookup_1(), crashing in bad_page_fault. > > The panic is caused by trying to deference a very low address (0x38 > in ppc64le), due to ipv6.fib6_main_tbl = NULL. > BUG: Kernel NULL pointer dereference at 0x00000038 > > The kernel panic was reproduced in a host that disabled IPv6 on boot and > have to process guest packets (coming from a bridge) using it's ip6tables. > > Terminate rule evaluation when packet protocol is IPv6 but the ipv6 module > is not loaded.
Patch is applied, thanks.
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