Description: tipc: better validate user input in tipc_nl_retrieve_key()
References:
Notes:
 carnil> Commit fixes e1f32190cf7d ("tipc: add support for AEAD key
 carnil> setting via netlink") in 5.5-rc1.
Bugs:
upstream: released (5.12-rc5) [0217ed2848e8538bcf9172d97ed2eeb4a26041bb]
5.10-upstream-stable: released (5.10.27) [50f41f2e29ff1980f7edfca40bbf81a4336b9feb]
4.19-upstream-stable: N/A "Vulnerable code introduced later"
4.9-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.10.28-1)
4.19-buster-security: N/A "Vulnerable code introduced later"
4.9-stretch-security: N/A "Vulnerable code introduced later"