Description: Bluetooth: Fix slab-out-of-bounds read in hci_extended_inquiry_result_evt()
References:
 https://sites.google.com/view/syzscope/kasan-slab-out-of-bounds-read-in-hci_extended_inquiry_result_evt
 https://syzkaller.appspot.com/bug?id=4bf11aa05c4ca51ce0df86e500fce486552dc8d2
 https://syzkaller.appspot.com/text?tag=ReproC&x=15ca2f46900000
Notes:
Bugs:
upstream: released (5.9-rc1) [51c19bf3d5cfaa66571e4b88ba2a6f6295311101]
5.10-upstream-stable: N/A "Fixed before branching point"
4.19-upstream-stable: released (4.19.139) [8c4a649c20fec015ebb326f36b47d4e39d9ff5b7]
4.9-upstream-stable: released (4.9.233) [aea77913022bbd0194feb33720d9bca8b6b26f9a]
sid: released (5.7.17-1) 
4.19-buster-security: released (4.19.146-1)
4.9-stretch-security: released (4.9.240-1)