netdev - Potential NULL pointer deference in net: sched

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Message-ID: <CABvMjLRuGnatUxBEMKpXWGNJnAjNMiCXQ7Ce88ejuuJJnENR+g@mail.gmail.com>
Date:   Mon, 7 Oct 2019 14:08:14 -0700
From:   Yizhuo Zhai <yzhai003@....edu>
To:     Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zhiyun Qian <zhiyunq@...ucr.edu>,
        Chengyu Song <csong@...ucr.edu>
Subject: Potential NULL pointer deference in net: sched

Hi All:

net/sched/sch_mq.c:
Inside function mq_dump_class(), mq_queue_get() could return NULL,
however, the return value of dev_queue is not checked  and get used.
This could potentially be unsafe.


-- 
Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside