[greybus-dev] Re: [PATCH][next] staging: greybus: i2c: Use struct_size() helper in gb_i2c_operation_create()

On Mon, Jan 24, 2022 at 12:19:03PM -0800, Kees Cook wrote:

This could still overflow if struct_size() returns SIZE_MAX. Perhaps:

if (check_add_overflow(struct_size(request, ops, msg_count), data_out_size, &request_size)) request_size = SIZE_MAX;

I should brush off the saturating arithmetic helpers series: https://lore.kernel.org/all/20210920180853.1825195-1-keescook@chromium.org/

Yes, please! Those seem like a million times easier to use.

regards, dan carpenter