Description: media: firewire: firedtv-avc: fix a buffer overflow in avc_ca_pmt()
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=1951739
 https://www.openwall.com/lists/oss-security/2021/04/20/1
 https://lore.kernel.org/linux-media/YHaulytonFcW+lyZ@mwanda/
 https://lore.kernel.org/linux-media/20210913152302.76d57784@coco.lan/
Notes:
Bugs:
upstream: released (5.16-rc1) [35d2969ea3c7d32aee78066b1f3cf61a0d935a4e]
5.10-upstream-stable: released (5.10.78) [d7fc85f6104259541ec136199d3bf7c8a736613d]
4.19-upstream-stable: released (4.19.216) [53ec9dab4eb0a8140fc85760fb50effb526fe219]
4.9-upstream-stable: released (4.9.299) [1795af6435fa5f17ced2d34854fd4871e0780092]
sid: released (5.14.16-1) [bugfix/all/media-firewire-firedtv-avc-fix-a-buffer-overflow-in-.patch]
5.10-bullseye-security: released (5.10.84-1)
4.19-buster-security: released (4.19.232-1)
4.9-stretch-security: released (4.9.290-1) [bugfix/all/media-firewire-firedtv-avc-fix-a-buffer-overflow-in-.patch]