diff options
| author | Dan Carpenter <dan.carpenter@linaro.org> | 2023-10-25 14:58:18 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-28 17:19:48 +0000 |
| commit | 45d0a298e05adee521f6fe605d6a88341ba07edd (patch) | |
| tree | 51ef34c3a3eb8b924275b944969597a5881c443d | |
| parent | de1c09598b8de52a0f0ee5fd9b1f22079f78330e (diff) | |
pwm: Fix double shift bug
[ 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>
| -rw-r--r-- | include/linux/pwm.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h index d2f9f690a9c1..fe0f38ce1bde 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, }; /* |