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 <[email protected]> Cc: Mark Brown <[email protected]> Signed-off-by: Kees Cook <[email protected]> --- 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
