AFAIU the second part of the ruling states that you don't need to warn/get permission by the author.
Basically, you can fix it for your own consumption.
Surely you can't redistribute copyrighted material.
Yes, through you might(?) distribute a tool to help people "fix" their thing themself.
Like bundling a open source decompiler, recompiler, code to work around decompilation restrictions and a patch into a single binary you can then use to fix the actual binary.
Surely you can't redistribute copyrighted material.