Reviewed-by: Cheng Jian <cj.chengjian@huawei.com> 在 2021/10/23 20:18, zcj 写道:
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
stable inclusion from stable-v5.10.44 commit e0b518a2eb44d8a74c19e50f79a8ed393e96d634 bugzilla:https://bugzilla.openeuler.org/show_bug.cgi?id=463 CVE: NA
-------------------------------------------------
commit dbec64b11c65d74f31427e2b9d5746fbf17bf840 upstream.
bit-mask for pins 0 to 4 is BIT(0) to BIT(4) however we ended up with BIT(n - 1) which is not right, and this was caught by below usban check
UBSAN: shift-out-of-bounds in drivers/gpio/gpio-wcd934x.c:34:14
Fixes: 59c324683400 ("gpio: wcd934x: Add support to wcd934x gpio controller") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: zcj <2459770937@qq.com> --- drivers/gpio/gpio-wcd934x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-wcd934x.c b/drivers/gpio/gpio-wcd934x.c index 1cbce5990855..97e6caedf1f3 100644 --- a/drivers/gpio/gpio-wcd934x.c +++ b/drivers/gpio/gpio-wcd934x.c @@ -7,7 +7,7 @@ #include <linux/slab.h> #include <linux/of_device.h>
-#define WCD_PIN_MASK(p) BIT(p - 1) +#define WCD_PIN_MASK(p) BIT(p) #define WCD_REG_DIR_CTL_OFFSET 0x42 #define WCD_REG_VAL_CTL_OFFSET 0x43 #define WCD934X_NPINS 5