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 lpddr_private. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Miquel Raynal <miquel.ray...@bootlin.com> Cc: Richard Weinberger <rich...@nod.at> Cc: Vignesh Raghavendra <vigne...@ti.com> Cc: linux-...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- include/linux/mtd/qinfo.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/mtd/qinfo.h b/include/linux/mtd/qinfo.h index 2e3f43788d48..0421f12156b5 100644 --- a/include/linux/mtd/qinfo.h +++ b/include/linux/mtd/qinfo.h @@ -24,7 +24,7 @@ struct lpddr_private { struct qinfo_chip *qinfo; int numchips; unsigned long chipshift; - struct flchip chips[]; + struct flchip chips[] __counted_by(numchips); }; /* qinfo_query_info structure contains request information for -- 2.34.1
