netdev - Re: [PATCH net] sch_sfq: fix null pointer dereference at timer expiration

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Message-Id: <20171128.155451.453993739982516213.davem@davemloft.net>
Date:   Tue, 28 Nov 2017 15:54:51 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     pabeni@...hat.com
Cc:     netdev@...r.kernel.org, jhs@...atatu.com, xiyou.wangcong@...il.com,
        jiri@...nulli.us, keescook@...omium.org
Subject: Re: [PATCH net] sch_sfq: fix null pointer dereference at timer
 expiration

From: Paolo Abeni <pabeni@...hat.com>
Date: Tue, 28 Nov 2017 14:28:39 +0100

> While converting sch_sfq to use timer_setup(), the commit cdeabbb88134
> ("net: sched: Convert timers to use timer_setup()") forgot to
> initialize the 'sch' field. As a result, the timer callback tries to
> dereference a NULL pointer, and the kernel does oops.
> 
> Fix it initializing such field at qdisc creation time.
> 
> Fixes: cdeabbb88134 ("net: sched: Convert timers to use timer_setup()")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Applied, thank you.