From db9795a43dc944f048a37b65e06707f60f713e34 Mon Sep 17 00:00:00 2001 From: Mikhail Lobanov Date: Tue, 10 Sep 2024 04:36:20 -0400 Subject: iio: accel: bma400: Fix uninitialized variable field_value in tap event handling. 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 Link: https://patch.msgid.link/20240910083624.27224-1-m.lobanov@rosalinux.ru Signed-off-by: Jonathan Cameron --- 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 89db242f06e0..441b8df2d0f3 100644 --- a/drivers/iio/accel/bma400_core.c +++ b/drivers/iio/accel/bma400_core.c @@ -1218,7 +1218,8 @@ 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; /* -- cgit v1.2.3