Stable inclusion request (GCC11-related fixes)

Hello Greg,

Can you please pick up following patches to respective releases from [master]: 82e5d8cc768b ("security: commoncap: fix -Wstringop-overread warning") # 4.14.y, 4.19.y, 5.4.y, 5.10.y e7c6e405e171 ("Fix misc new gcc warnings") # 4.19.y, 5.4.y, 5.10.y

They do solve build warnings with GCC11.

Thanks a lot!