diff options
| author | Kees Cook <keescook@chromium.org> | 2023-10-06 23:17:07 +0300 |
|---|---|---|
| committer | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2023-10-08 14:36:40 +0300 |
| commit | 4e1e21117e7e1275477ba80e634c769a511249bd (patch) | |
| tree | 5e52d0c12783086dc4b707809ba6fa98d48967b4 /drivers/pinctrl/samsung | |
| parent | 0bb80ecc33a8fb5a682236443c1e740d5c917d1d (diff) | |
| download | linux-4e1e21117e7e1275477ba80e634c769a511249bd.tar.xz | |
pinctrl: samsung: Annotate struct exynos_muxed_weint_data with __counted_by
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>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20231006201707.work.405-kees@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Diffstat (limited to 'drivers/pinctrl/samsung')
| -rw-r--r-- | drivers/pinctrl/samsung/pinctrl-exynos.c | 2 | ||||
| -rw-r--r-- | drivers/pinctrl/samsung/pinctrl-exynos.h | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c index a8212fc126bf..6b58ec84e34b 100644 --- a/drivers/pinctrl/samsung/pinctrl-exynos.c +++ b/drivers/pinctrl/samsung/pinctrl-exynos.c @@ -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; } diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.h b/drivers/pinctrl/samsung/pinctrl-exynos.h index 7bd6d82c9f36..3ac52c2cf998 100644 --- a/drivers/pinctrl/samsung/pinctrl-exynos.h +++ b/drivers/pinctrl/samsung/pinctrl-exynos.h @@ -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); |