From: Kees Cook Date: Fri, 22 Sep 2023 17:53:15 +0000 (-0700) Subject: ACPI: PRM: Annotate struct prm_module_info with __counted_by X-Git-Tag: v6.7-rc1~158^2~3^3 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2e89345764c6a87c778e776c0590bda07425f251;p=thirdparty%2Flinux.git ACPI: PRM: Annotate struct prm_module_info with __counted_by 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. Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci # [1] Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c index 7020584096bfa..c78453c74ef5a 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)