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power: supply: axp20x_ac_power: Annotate struct axp20x_ac_power 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 axp20x_ac_power.

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

Cc: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230922175355.work.006-kees@kernel.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Kees Cook 2023-09-22 10:53:55 -07:00 committed by Sebastian Reichel
parent a6c6a5fe2a
commit 7daa3bd4b0
1 changed files with 1 additions and 1 deletions
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drivers/power/supply/axp20x_ac_power.c
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@ -45,7 +45,7 @@ struct axp20x_ac_power {
struct iio_channel *acin_i;
bool has_acin_path_sel;
unsigned int num_irqs;
unsigned int irqs[];
unsigned int irqs[] __counted_by(num_irqs);
};
static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)