There are no null checks in the registerAsset() function, so admins can mistakenly pass 0x0 to that function, which will cause the for-loop to revert when that asset is reached. Ive marked this as Low rather than Medium since the admin can work around it by using the _offset and _count input arguments to the function.
There is 1 instance of this issue:
https://github.com/code-423n4/2022-05-sturdy/blob/78f51a7a74ebe8adfd055bdbaedfddc05632566f/smart-contracts/YieldManager.sol#L118-L122
