From: Yu Zhao <yuzhao@xxxxxxxxxx> Date: Fri, 28 Sep 2018 17:04:30 -0600 > Cancel pending work before freeing smsc75xx private data structure > during binding. This fixes the following crash in the driver: > > BUG: unable to handle kernel NULL pointer dereference at 0000000000000050 > IP: mutex_lock+0x2b/0x3f > <snipped> > Workqueue: events smsc75xx_deferred_multicast_write [smsc75xx] > task: ffff8caa83e85700 task.stack: ffff948b80518000 > RIP: 0010:mutex_lock+0x2b/0x3f > <snipped> > Call Trace: > smsc75xx_deferred_multicast_write+0x40/0x1af [smsc75xx] > process_one_work+0x18d/0x2fc > worker_thread+0x1a2/0x269 > ? pr_cont_work+0x58/0x58 > kthread+0xfa/0x10a > ? pr_cont_work+0x58/0x58 > ? rcu_read_unlock_sched_notrace+0x48/0x48 > ret_from_fork+0x22/0x40 > > Signed-off-by: Yu Zhao <yuzhao@xxxxxxxxxx> Applied and queued up for -stable.
