From 20551ee45d7d9fc655e27d16380e65ae8acbacc0 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 22 Sep 2023 10:28:50 -0700 Subject: [PATCH] net: ipa: Annotate struct ipa_power 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 ipa_power. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Reviewed-by: Alex Elder Link: https://lore.kernel.org/r/20230922172858.3822653-8-keescook@chromium.org Signed-off-by: Jakub Kicinski --- drivers/net/ipa/ipa_power.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ipa/ipa_power.c b/drivers/net/ipa/ipa_power.c index 0eaa7a7f33437..e223886123cea 100644 --- a/drivers/net/ipa/ipa_power.c +++ b/drivers/net/ipa/ipa_power.c @@ -67,7 +67,7 @@ struct ipa_power { spinlock_t spinlock; /* used with STOPPED/STARTED power flags */ DECLARE_BITMAP(flags, IPA_POWER_FLAG_COUNT); u32 interconnect_count; - struct icc_bulk_data interconnect[]; + struct icc_bulk_data interconnect[] __counted_by(interconnect_count); }; /* Initialize interconnects required for IPA operation */ -- 2.30.2