netdev - Re: [PATCH net v1 1/1] tipc: fix nullptr crash during subscription cancel

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Date:	Sun, 06 Mar 2016 23:01:03 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	parthasarathy.bhuvaragan@...csson.com
Cc:	netdev@...r.kernel.org, tipc-discussion@...ts.sourceforge.net,
	jon.maloy@...csson.com, maloy@...jonn.com, ying.xue@...driver.com
Subject: Re: [PATCH net v1 1/1] tipc: fix nullptr crash during subscription
 cancel

From: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@...csson.com>
Date: Thu, 3 Mar 2016 17:54:54 +0100

> commit 4d5cfcba2f6e ('tipc: fix connection abort during subscription
> cancel'), removes the check for a valid subscription before calling
> tipc_nametbl_subscribe().
> 
> This will lead to a nullptr exception when we process a
> subscription cancel request. For a cancel request, a null
> subscription is passed to tipc_nametbl_subscribe() resulting
> in exception.
> 
> In this commit, we call tipc_nametbl_subscribe() only for
> a valid subscription.
> 
> Fixes: 4d5cfcba2f6e ('tipc: fix connection abort during subscription cancel')
> Reported-by: Anders Widell <anders.widell@...csson.com>
> Signed-off-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@...csson.com>
> Acked-by: Jon Maloy <jon.maloy@...csson.com>

Applied.