From: Dan Carpenter dan.carpenter@linaro.org
[ Upstream commit d27abbfd4888d79dd24baf50e774631046ac4732 ]
These enums are passed to set/test_bit(). The set/test_bit() functions take a bit number instead of a shifted value. Passing a shifted value is a double shift bug like doing BIT(BIT(1)). The double shift bug doesn't cause a problem here because we are only checking 0 and 1 but if the value was 5 or above then it can lead to a buffer overflow.
Signed-off-by: Dan Carpenter dan.carpenter@linaro.org Reviewed-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de Reviewed-by: Sam Protsenko semen.protsenko@linaro.org Signed-off-by: Thierry Reding thierry.reding@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/pwm.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/pwm.h b/include/linux/pwm.h index d2f9f690a9c14..fe0f38ce1bdee 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -41,8 +41,8 @@ struct pwm_args { };
enum { - PWMF_REQUESTED = 1 << 0, - PWMF_EXPORTED = 1 << 1, + PWMF_REQUESTED = 0, + PWMF_EXPORTED = 1, };
/*