@@ -616,6 +616,7 @@ __init int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
+ muxed_banks*sizeof(struct samsung_pin_bank *), GFP_KERNEL);
if (!muxed_data)
return -ENOMEM;
+ muxed_data->nr_banks = muxed_banks;
irq_set_chained_handler_and_data(irq, exynos_irq_demux_eint16_31,
muxed_data);
@@ -628,7 +629,6 @@ __init int exynos_eint_wkup_init(struct samsung_pinctrl_drv_data *d)
muxed_data->banks[idx++] = bank;
}
- muxed_data->nr_banks = muxed_banks;
return 0;
}
@@ -159,7 +159,7 @@ struct exynos_weint_data {
*/
struct exynos_muxed_weint_data {
unsigned int nr_banks;
- struct samsung_pin_bank *banks[];
+ struct samsung_pin_bank *banks[] __counted_by(nr_banks);
};
int exynos_eint_gpio_init(struct samsung_pinctrl_drv_data *d);
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 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 exynos_muxed_weint_data. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. Cc: Tomasz Figa <tomasz.figa@gmail.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Alim Akhtar <alim.akhtar@samsung.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: linux-hardening@vger.kernel.org Link: https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci [1] Signed-off-by: Kees Cook <keescook@chromium.org> --- drivers/pinctrl/samsung/pinctrl-exynos.c | 2 +- drivers/pinctrl/samsung/pinctrl-exynos.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)