Messages in this thread | | | From | "H. Peter Anvin" <> | Subject | Re: copy_from_user() fixu | Date | Tue, 25 Aug 1998 00:29:30 -0700 (PDT) |
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> > Well, being serious here, I have a library that is bug-free, but I > can't depend on application writers to sustain my level of > perfection. So, so help these lesser beings, I trap EFAULT in my > library and yield a more meaningful diagnostic than a mere EFAULT or > SEGV. >
Now you *really* convinced me that you're crazy.
Once again: if you're relying on EFAULT rather than SIGSEGV, your code is broken, as you're relying on details of the libc/kernel interface. I would argue that *IS* a bug in your "bug-free" library.
If you want to trap errors, you either have to sanitize the input, or trap SIGSEGV.
-hpa
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