netdev - Re: [net 1/1] tipc: fix access of released memory

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Message-Id: <20171121.202229.341348187080505844.davem@davemloft.net>
Date:   Tue, 21 Nov 2017 20:22:29 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     jon.maloy@...csson.com
Cc:     netdev@...r.kernel.org,
        mohan.krishna.ghanta.krishnamurthy@...csson.com,
        tung.q.nguyen@...tech.com.au, hoang.h.le@...tech.com.au,
        canh.d.luu@...tech.com.au, ying.xue@...driver.com,
        tipc-discussion@...ts.sourceforge.net
Subject: Re: [net 1/1] tipc: fix access of released memory

From: Jon Maloy <jon.maloy@...csson.com>
Date: Mon, 20 Nov 2017 21:43:03 +0100

> When the function tipc_group_filter_msg() finds that a member event
> indicates that the member is leaving the group, it first deletes the
> member instance, and then purges the message queue being handled
> by the call. But the message queue is an aggregated field in the
> just deleted item, leading the purge call to access freed memory.
> 
> We fix this by swapping the order of the two actions.
> 
> Signed-off-by: Jon Maloy <jon.maloy@...csson.com>

Applied, thanks Jon.