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Subject[PATCH] interconnect: icc-clk: Annotate struct icc_clk_provider with __counted_by
Date
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 icc_clk_provider.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Georgi Djakov <djakov@kernel.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/interconnect/icc-clk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/interconnect/icc-clk.c b/drivers/interconnect/icc-clk.c
index 4d43ebff4257..d787f2ea36d9 100644
--- a/drivers/interconnect/icc-clk.c
+++ b/drivers/interconnect/icc-clk.c
@@ -16,7 +16,7 @@ struct icc_clk_node {
struct icc_clk_provider {
struct icc_provider provider;
int num_clocks;
- struct icc_clk_node clocks[];
+ struct icc_clk_node clocks[] __counted_by(num_clocks);
};

#define to_icc_clk_provider(_provider) \
--
2.34.1
\
 
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