On Fri, Sep 18, 2020 at 12:37:48PM -0700, Linus Torvalds wrote:
> > Applying sizeof() to a structure containing a flex-array member is allowed,
>
> Yes, and that's wrong and inconsistent, but what else is new about the
> C standard. It's what allows these kinds of bugs to slip through.
Hmm. We actually do that in our implementation of struct_size()
#define struct_size(p, member, count) \
__ab_c_size(count, \
sizeof(*(p)->member) + __must_be_array((p)->member),\
sizeof(*(p)))
I suppose it's not really necessary, we could do offsetof here, right?
#define struct_size(p, member, count) \
__ab_c_size(count, \
sizeof(*(p)->member) + __must_be_array((p)->member),\
offsetof(typeof(*(p)), member))
