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Subject[PATCH] regulator: mc13xxx: Annotate struct mc13xxx_regulator_priv 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 mc13xxx_regulator_priv.

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

Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/regulator/mc13xxx.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/mc13xxx.h b/drivers/regulator/mc13xxx.h
index e03279dc43f4..057aaef6f086 100644
--- a/drivers/regulator/mc13xxx.h
+++ b/drivers/regulator/mc13xxx.h
@@ -24,7 +24,7 @@ struct mc13xxx_regulator_priv {
u32 powermisc_pwgt_state;
struct mc13xxx_regulator *mc13xxx_regulators;
int num_regulators;
- struct regulator_dev *regulators[];
+ struct regulator_dev *regulators[] __counted_by(num_regulators);
};

extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,
--
2.34.1
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