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regulator: mc13xxx: Annotate struct mc13xxx_regulator_priv with __counted_by

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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>
Link: https://lore.kernel.org/r/20230922175402.work.819-kees@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:54:02 -07:00 committed by Mark Brown
parent dd35a4debc
commit 6e6891ccf0
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1 changed files with 1 additions and 1 deletions
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2
drivers/regulator/mc13xxx.h
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@ -24,7 +24,7 @@ struct mc13xxx_regulator_priv {
u32 powermisc_pwgt_state; u32 powermisc_pwgt_state;
struct mc13xxx_regulator *mc13xxx_regulators; struct mc13xxx_regulator *mc13xxx_regulators;
int num_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, extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,