In the current implementation, the local variable field_value is used
without prior initialization, which may lead to reading uninitialized
memory. Specifically, in the macro set_mask_bits, the initial
(potentially uninitialized) value of the buffer is copied into old__,
and a mask is applied to calculate new__. A similar issue was resolved in
commit 6ee2a7058fea ("iio: accel: bma400: Fix smatch warning based on use
of unintialized value.").
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 961db2da159d ("iio: accel: bma400: Add support for single and double tap events")
Signed-off-by: Mikhail Lobanov <m.lobanov@xxxxxxxxxxxx>
---
drivers/iio/accel/bma400_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/accel/bma400_core.c b/drivers/iio/accel/bma400_core.c
index e90e2f01550a..04083b7395ab 100644
--- a/drivers/iio/accel/bma400_core.c
+++ b/drivers/iio/accel/bma400_core.c
@@ -1219,7 +1219,8 @@ static int bma400_activity_event_en(struct bma400_data *data,
static int bma400_tap_event_en(struct bma400_data *data,
enum iio_event_direction dir, int state)
{
- unsigned int mask, field_value;
+ unsigned int mask;
+ unsigned int field_value = 0;
int ret;
/*
--
2.43.0
