Messages in this thread | | | From | Jonathan Maxwell <> | Date | Thu, 9 Mar 2017 14:42:47 +1100 | Subject | Re: [PATCH net] dccp/tcp: fix routing redirect race |
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Sorry let me resend in plain text mode.
On Thu, Mar 9, 2017 at 1:10 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote: > On Thu, 2017-03-09 at 12:15 +1100, Jon Maxwell wrote: >> We have seen a few incidents lately where a dst_enty has been freed >> with a dangling TCP socket reference (sk->sk_dst_cache) pointing to that >> dst_entry. If the conditions/timings are right a crash then ensues when the >> freed dst_entry is referenced later on. A Common crashing back trace is: > > Very nice catch ! >
Thanks Eric.
> Don't we have a similar issue for IPv6 ? > >
Good point.
We checked and as far as we can tell IPv6 does not invalidate the route. So it should be safer.
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