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Date:   Fri, 15 Apr 2022 10:00:11 +0000
To:     David Howells <>
Subject: Re: [PATCH net] rxrpc: Restore removed timer deletion


This patch was applied to netdev/net.git (master)
by David S. Miller <>:

On Wed, 13 Apr 2022 11:16:25 +0100 you wrote:
> A recent patch[1] from Eric Dumazet flipped the order in which the
> keepalive timer and the keepalive worker were cancelled in order to fix a
> syzbot reported issue[2].  Unfortunately, this enables the mirror image bug
> whereby the timer races with rxrpc_exit_net(), restarting the worker after
> it has been cancelled:
> 	CPU 1		CPU 2
> 	===============	=====================
> 			if (rxnet->live)
> 	rxnet->live = false;
>  	cancel_work_sync(&rxnet->peer_keepalive_work);
> 			rxrpc_queue_work(&rxnet->peer_keepalive_work);
> 	del_timer_sync(&rxnet->peer_keepalive_timer);
> [...]

Here is the summary with links:
  - [net] rxrpc: Restore removed timer deletion

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