Description: crypto: authenc - fix parsing key with misaligned rta_len
References:
 https://lkml.org/lkml/2019/1/21/675
 https://www.openwall.com/lists/oss-security/2020/06/23/1
Notes:
Bugs:
upstream: released (5.0-rc3) [8f9c469348487844328e162db57112f7d347c49f]
4.19-upstream-stable: released (4.19.17) [44c67402c3f738b7048de4464c02461bc8d0fd37]
4.9-upstream-stable: released (4.9.152) [6ddfcf0b4c6ce7cfeb5d9e36d991345f3fe6e600]
3.16-upstream-stable: released (3.16.66) [6ddfcf0b4c6ce7cfeb5d9e36d991345f3fe6e600]
sid: released (4.19.20-1)
4.19-buster-security: N/A "Fixed before branching point"
4.9-stretch-security: released (4.9.161-1)
3.16-jessie-security: released (3.16.68-1)