From 36b2d7dd5a8ac95c8c1e69bdc93c4a6e2dc28a23 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 6 Oct 2023 13:17:49 -0700 Subject: driver core: platform: Annotate struct irq_affinity_devres 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 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 irq_affinity_devres. Cc: Greg Kroah-Hartman Cc: "Rafael J. Wysocki" Cc: "Gustavo A. R. Silva" Cc: linux-hardening@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20231006201749.work.432-kees@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/base/platform.c') diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 828908d1d5b9..10c577963418 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -292,7 +292,7 @@ EXPORT_SYMBOL_GPL(platform_irq_count); struct irq_affinity_devres { unsigned int count; - unsigned int irq[]; + unsigned int irq[] __counted_by(count); }; static void platform_disable_acpi_irq(struct platform_device *pdev, int index) -- cgit