Description: media: dvb-core: Fix use-after-free due to race condition occurring in dvb_register_device()
References:
 https://lore.kernel.org/linux-media/20221115131822.6640-1-imv4bel@gmail.com/
 https://lore.kernel.org/linux-media/20221115131822.6640-4-imv4bel@gmail.com/
Notes:
 carnil> Negligible security impact, would need physical access to
 carnil> "exploit"
Bugs:
upstream: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
6.1-upstream-stable: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
5.10-upstream-stable: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
4.19-upstream-stable: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
sid: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
6.1-bookworm-security: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
5.10-bullseye-security: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"
4.19-buster-security: ignored "non issue, if anyone has physical access to trigger this they can do more harm anyway"