Strict memcpy() bounds checking for the kernel

Posted Jul 30, 2021 21:07 UTC (Fri) by post-factum (subscriber, #53836)
Parent article: Strict memcpy() bounds checking for the kernel

How does it play with the struct layout randomisation?

Strict memcpy() bounds checking for the kernel

Posted Jul 30, 2021 21:33 UTC (Fri) by mathstuf (subscriber, #69389) [Link] (1 responses)

Isn't that just for static structures full of function pointers (basically vtables)? Presumably `sk_buff` structures and other such things being `memcpy`'d to are not constant once the kernel is booted.

Strict memcpy() bounds checking for the kernel

Posted Aug 2, 2021 15:07 UTC (Mon) by kees (subscriber, #27264) [Link]

Right, and if any __randomize_layout struct wanted to use struct_group() it could as those would be kept together. It actually makes things easier.