From: Kees Cook Date: Fri, 22 Sep 2023 17:28:46 +0000 (-0700) Subject: net: hns: Annotate struct ppe_common_cb with __counted_by X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5b829c8460aeaaa9b9c7efc8cb020b83f9f36203;p=linux.git net: hns: Annotate struct ppe_common_cb 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 ppe_common_cb. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Yisen Zhuang Cc: Salil Mehta Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20230922172858.3822653-4-keescook@chromium.org Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.h b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.h index 0f0e16f9afc0d..7e00231c1acfa 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.h +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_ppe.h @@ -92,7 +92,7 @@ struct ppe_common_cb { u8 comm_index; /*ppe_common index*/ u32 ppe_num; - struct hns_ppe_cb ppe_cb[]; + struct hns_ppe_cb ppe_cb[] __counted_by(ppe_num); };