In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix WARNING "do not call blocking ops when !TASKRUNNING" waiteventtimeout() will set the state of the current task to TASKUNINTERRUPTIBLE, before doing the condition check. This means that ksmbddurablescavengeralive() will try to acquire the mutex while already in a sleeping state. The scheduler warns us by giving the following warning: do not call blocking ops when !TASKRUNNING; state=2 set at [<0000000061515a6f>] preparetowaitevent+0x9f/0x6c0 WARNING: CPU: 2 PID: 4147 at kernel/sched/core.c:10099 _mightsleep+0x12f/0x160 mutex lock is not needed in ksmbddurablescavengeralive().