netdev - Re: [PATCHv2 net] sctp: change to hold/put transport for proto_unreach

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Date:   Sat, 14 Nov 2020 10:40:23 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Xin Long <lucien.xin@...il.com>
Cc:     network dev <netdev@...r.kernel.org>, linux-sctp@...r.kernel.org,
        davem@...emloft.net, kuba@...nel.org,
        Neil Horman <nhorman@...driver.com>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: Re: [PATCHv2 net] sctp: change to hold/put transport for
 proto_unreach_timer

On Sat, Nov 14, 2020 at 01:22:53PM +0800, Xin Long wrote:
> A call trace was found in Hangbin's Codenomicon testing with debug kernel:
> 
...
> 
> So fix it by holding/putting transport instead for proto_unreach_timer
> in transport, just like other timers in transport.
> 
> v1->v2:
>   - Also use sctp_transport_put() for the "out_unlock:" path in
>     sctp_generate_proto_unreach_event(), as Marcelo noticed.
> 
> Fixes: 50b5d6ad6382 ("sctp: Fix a race between ICMP protocol unreachable and connect()")
> Reported-by: Hangbin Liu <liuhangbin@...il.com>
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>