Description: tee: handle lookup of shm with reference count 0
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2030747
 https://lore.kernel.org/lkml/20211214123540.1789434-1-jens.wiklander@linaro.org/
Notes:
Bugs:
upstream: needed
5.10-upstream-stable: needed
4.19-upstream-stable: needed
4.9-upstream-stable: N/A "Vulnerable code not present"
sid:
5.10-bullseye-security:
4.19-buster-security:
4.9-stretch-security: N/A "Vulnerable code not present"