From: Kees Cook Date: Fri, 22 Sep 2023 17:51:32 +0000 (-0700) Subject: irqchip/imx-intmux: Annotate struct intmux_data with __counted_by X-Git-Tag: io_uring-6.7-2023-11-10~89^2~11 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=0f768682452867588d640b1bc1a5afdd1b59c584;p=linux-block.git irqchip/imx-intmux: Annotate struct intmux_data 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 intmux_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Thomas Gleixner Cc: Marc Zyngier Cc: Shawn Guo Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Fabio Estevam Cc: NXP Linux Team Cc: linux-arm-kernel@lists.infradead.org Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230922175131.work.718-kees@kernel.org Signed-off-by: Kees Cook --- 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)