Description: tipc: fix size validations for the MSG_CRYPTO type
References:
 https://www.sentinelone.com/labs/tipc-remote-linux-kernel-heap-overflow-allows-arbitrary-code-execution/
Notes:
 carnil> Commit fixes 1ef6f7c9390f ("tipc: add automatic session key
 carnil> exchange") in 5.10-rc1.
Bugs:
upstream: released (5.15) [fa40d9734a57bcbfa79a280189799f76c88f7bb0]
5.10-upstream-stable: released (5.10.77) [0b1b3e086b0af2c2faa9938c4db956fe6ce5c965]
4.19-upstream-stable: N/A "Vulnerable code introduced later"
4.9-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.14.16-1)
5.10-bullseye-security: released (5.10.84-1)
4.19-buster-security: N/A "Vulnerable code introduced later"
4.9-stretch-security: N/A "Vulnerable code introduced later"