Re: [PATCH] net/sctp: fix race condition in sctp_destroy_sock

[Marcelo Ricardo Leitner]

On Tue, Apr 13, 2021 at 12:31:53PM +0300, Or Cohen wrote:
> +++ b/net/sctp/socket.c
> @@ -1520,11 +1520,9 @@ static void sctp_close(struct sock *sk, long timeout)
>  
>  	/* Supposedly, no process has access to the socket, but
>  	 * the net layers still may.
> -	 * Also, sctp_destroy_sock() needs to be called with addr_wq_lock
> -	 * held and that should be grabbed before socket lock.
>  	 */

Please also update the following comment in sctp_init_sock():
          /* Nothing can fail after this block, otherwise
           * sctp_destroy_sock() will be called without addr_wq_lock held
           */

Other than this, LGTM. Thanks.

  Marcelo