On Tue, Mar 23, 2021 at 01:39:35PM -0700, Sami Tolvanen wrote: > With CONFIG_CFI_CLANG, a callback function passed to > __kthread_queue_delayed_work from a module points to a jump table > entry defined in the module instead of the one used in the core > kernel, which breaks function address equality in this check: > > WARN_ON_ONCE(timer->function != ktead_delayed_work_timer_fn); > > Use WARN_ON_FUNCTION_MISMATCH() instead to disable the warning > when CFI and modules are both enabled. > > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> -- Kees Cook
