CVE-2022-50634

In the Linux kernel, the following vulnerability has been resolved:

power: supply: cw2015: Fix potential null-ptr-deref in cwbatprobe()

cwbatprobe() calls createsinglethreadworkqueue() and not checked the ret value, which may return NULL. And a null-ptr-deref may happen:

cwbatprobe() createsinglethreadworkqueue() # failed, cwbat->wq is NULL queuedelayedwork() queuedelayedworkon() __queuedelayedwork() # warning here, but continue _queuework() # access wq->flags, null-ptr-deref

Check the ret value and return -ENOMEM if it is NULL.