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 intmux_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Thomas Gleixner <t...@linutronix.de> Cc: Marc Zyngier <m...@kernel.org> Cc: Shawn Guo <shawn...@kernel.org> Cc: Sascha Hauer <s.ha...@pengutronix.de> Cc: Pengutronix Kernel Team <ker...@pengutronix.de> Cc: Fabio Estevam <feste...@gmail.com> Cc: NXP Linux Team <linux-...@nxp.com> Cc: linux-arm-ker...@lists.infradead.org Signed-off-by: Kees Cook <keesc...@chromium.org> --- drivers/irqchip/irq-imx-intmux.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-imx-intmux.c b/drivers/irqchip/irq-imx-intmux.c index 6d9a08238c9d..aa041e4dfee0 100644 --- a/drivers/irqchip/irq-imx-intmux.c +++ b/drivers/irqchip/irq-imx-intmux.c @@ -73,7 +73,7 @@ struct intmux_data { void __iomem *regs; struct clk *ipg_clk; int channum; - struct intmux_irqchip_data irqchip_data[]; + struct intmux_irqchip_data irqchip_data[] __counted_by(channum); }; static void imx_intmux_irq_mask(struct irq_data *d) -- 2.34.1
