On Sat, Sep 23, 2023 at 11:41 AM Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx> wrote: > > > > On 9/22/23 11:53, Kees Cook wrote: > > Prepare for the coming implementation by GCC and Clang of the __counted_by > > attribute. Flexible array members annotated with __counted_by can have > > their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS > > (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > > functions). > > > > As found with Coccinelle[1], add __counted_by for struct prm_module_info. > > > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > > > Cc: "Rafael J. Wysocki" <rafael@xxxxxxxxxx> > > Cc: Len Brown <lenb@xxxxxxxxxx> > > Cc: linux-acpi@xxxxxxxxxxxxxxx > > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > > Reviewed-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx> Applied as 6.7 material, thanks! > > --- > > drivers/acpi/prmt.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c > > index 7020584096bf..c78453c74ef5 100644 > > --- a/drivers/acpi/prmt.c > > +++ b/drivers/acpi/prmt.c > > @@ -69,7 +69,7 @@ struct prm_module_info { > > bool updatable; > > > > struct list_head module_list; > > - struct prm_handler_info handlers[]; > > + struct prm_handler_info handlers[] __counted_by(handler_count); > > }; > > > > static u64 efi_pa_va_lookup(u64 pa)
