From: Julian Anastasov <j...@ssi.bg>
Date: Thu, 9 Jul 2015 09:59:08 +0300
> Test script from Eric W. Biederman can catch a problem
> where packets from backlog are processed long after the last
> synchronize_net call. This can be reproduced after few tests
> if commit 381c759d9916 ("ipv4: Avoid crashing in ip_error")
> is reverted for the test. Incoming packets do not hold
> reference to device but even if they do, subsystems do not
> expect packets to fly during and after the NETDEV_UNREGISTER
> event.
>
> The first fix has the cost of netif_running check in fast path.
> The second fix calls rcu_read_lock while local IRQ is disabled,
> I hope this is not against the rules.
Thanks for fixing this tricky bug.
Applied and queued up for -stable.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
