use-after-free when dvb_demux_open() is called between the two syncs of dvbdev->users and dvr_dvbdev->users in dvb_dmxdev_release()
use-after-free when dvb_demux_open() is called between the two syncs of dvbdev->users and dvr_dvbdev->users in dvb_dmxdev_release()
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd3d91ab1c6ab0628fe642dd570b56302c30a792 https://kernel.dance/#CVE-2022-41218