> > 2. What happens if I pass a null pointer as the destination parameter
> > to copy_from_user? Does copy_from_user handle it safely or will the
> > kernel seg fault?
>
> The kernel won't crash, but it might fail (depending on whether 0 is a
> valid user space address or not).
Why does it matter if 0 is a valid user space or not? If I make the call
copy_from_user(0, user_ptr, 4);
the null pointer is the kernel address, not the user address. Can you
clarify please?
Thanks
Ken
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This archive was generated by hypermail 2b29 : Wed Nov 07 2001 - 21:00:20 EST