Re: [PATCH 1/2] dccp: ccid: move timers to struct dccp_sock

[Jakub Kicinski]

On Tue, 13 Oct 2020 19:18:48 +0200 Kleber Sacilotto de Souza wrote:
> From: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>
> 
> When dccps_hc_tx_ccid is freed, ccid timers may still trigger. The reason
> del_timer_sync can't be used is because this relies on keeping a reference
> to struct sock. But as we keep a pointer to dccps_hc_tx_ccid and free that
> during disconnect, the timer should really belong to struct dccp_sock.
> 
> This addresses CVE-2020-16119.
> 
> Fixes: 839a6094140a (net: dccp: Convert timers to use timer_setup())

Presumably you chose this commit because the fix won't apply beyond it?
But it really fixes 2677d2067731 (dccp: don't free.. right?

> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>
> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@xxxxxxxxxxxxx>