Re: Potential NULL pointer deference in net: sched

[Eric Dumazet]

On 10/7/19 2:08 PM, Yizhuo Zhai wrote:
> 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.
> 
> 

Not really.

mq_dump_class() is called by a layer that made sure the @cl argument
was not complete garbage.