[PATCH] irqchip/imx-intmux: Annotate struct intmux_data with __counted_by
Kees Cook
keescook at chromium.org
Fri Sep 22 10:51:32 PDT 2023
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 <tglx at linutronix.de>
Cc: Marc Zyngier <maz at kernel.org>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: NXP Linux Team <linux-imx at nxp.com>
Cc: linux-arm-kernel at lists.infradead.org
Signed-off-by: Kees Cook <keescook at 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
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