integer overflow and some other bugs

hi,i found some bug with oss-fuzz,and submit the issues to github:

link:
https://github.com/LibRaw/LibRaw/issues/466
https://github.com/LibRaw/LibRaw/issues/467

Forums: 

Thank you for your effort.

Thank you for your effort.

Both bugs are 'garbage in/garbage out', so no plans to fix these bugs

-- Alex Tutubalin @LibRaw LLC