From 4a530cb932af31b0c919a109bc107dd186653381 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:50:53 -0700 Subject: [PATCH] hwmon: Annotate struct gsc_hwmon_platform_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 gsc_hwmon_platform_data. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Tim Harvey Reviewed-by: "Gustavo A. R. Silva" Link: https://lore.kernel.org/r/20230922175053.work.564-kees@kernel.org Signed-off-by: Kees Cook --- include/linux/platform_data/gsc_hwmon.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/platform_data/gsc_hwmon.h b/include/linux/platform_data/gsc_hwmon.h index f2781aa7eff8..70e8a6bec0f6 100644 --- a/include/linux/platform_data/gsc_hwmon.h +++ b/include/linux/platform_data/gsc_hwmon.h @@ -40,6 +40,6 @@ struct gsc_hwmon_platform_data { unsigned int resolution; unsigned int vreference; unsigned int fan_base; - struct gsc_hwmon_channel channels[]; + struct gsc_hwmon_channel channels[] __counted_by(nchannels); }; #endif