On Tue, 10 Jun 2014, Eric Dumazet wrote:

On Tue, 2014-06-10 at 18:12 -0700, Eric Dumazet wrote:

quoted

For the curious, another problem is in ipv4_sk_update_pmtu()

This can be called on UDP sockets, but from softirq context.

We cannot use sk_dst_lock because this lock is not softirq safe.

I guess we should use xchg() for sk_dst_set() and sk_dst_reset()

This would be something like this untested patch :

I see this didn't get queued for stable, should it be dropped due to the
later patch? (which did get queued for stable).