6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mikhail Lobanov <m.lobanov@xxxxxxxxxxxx>
[ Upstream commit db9795a43dc944f048a37b65e06707f60f713e34 ]
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>
Link: https://patch.msgid.link/20240910083624.27224-1-m.lobanov@xxxxxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 6e4d10a7cd322..4d91747b20270 100644
--- a/drivers/iio/accel/bma400_core.c
+++ b/drivers/iio/accel/bma400_core.c
@@ -1245,7 +1245,8 @@ 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
