Description: use-after-free in sunkbd_reinit
References:
 https://www.openwall.com/lists/oss-security/2020/11/05/2
 https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git/commit/?h=for-linus&id=77e70d351db7de07a46ac49b87a6c3c7a60fca7e
Notes:
 carnil> Released as well in v5.9.10.
Bugs:
upstream: released (5.10-rc5) [77e70d351db7de07a46ac49b87a6c3c7a60fca7e]
4.19-upstream-stable: released (4.19.159) [8bf2e8fe8a8e2e05246215697bb55f8901faef44]
4.9-upstream-stable: released (4.9.245) [452e66f60880ac1fa1ca0a594fc1ebaee87fa35d]
sid: released (5.9.11-1)
4.19-buster-security: released (4.19.160-1)
4.9-stretch-security: released (4.9.246-1)