summaryrefslogtreecommitdiff
path: root/drivers/iio/humidity/dht11.c
diff options
context:
space:
mode:
authorRichard Weinberger <richard@nod.at>2015-01-07 15:15:22 +0300
committerJonathan Cameron <jic23@kernel.org>2015-01-10 14:13:35 +0300
commitddc25bdd2b7f34667111714fafc9c04f6ad97fee (patch)
tree6adbb65c734300631f9d413f7ac16a6e6b5ee0d3 /drivers/iio/humidity/dht11.c
parent8ecb55b849b74dff026681b41266970072b207dd (diff)
downloadlinux-ddc25bdd2b7f34667111714fafc9c04f6ad97fee.tar.xz
iio: dht11: Fix out-of-bounds read
As we access i-1 we must not start with i=0. Signed-off-by: Richard Weinberger <richard@nod.at> Acked-by: Hartmut Knaack <knaack.h@gmx.de> Acked-by: Harald Geyer <harald@ccbib.org> Reviewed-by: Sanjeev Sharma <sanjeev_sharma@mentor.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/humidity/dht11.c')
-rw-r--r--drivers/iio/humidity/dht11.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
index 623c145d8a97..f546ecae90f1 100644
--- a/drivers/iio/humidity/dht11.c
+++ b/drivers/iio/humidity/dht11.c
@@ -88,7 +88,7 @@ static int dht11_decode(struct dht11 *dht11, int offset)
unsigned char temp_int, temp_dec, hum_int, hum_dec, checksum;
/* Calculate timestamp resolution */
- for (i = 0; i < dht11->num_edges; ++i) {
+ for (i = 1; i < dht11->num_edges; ++i) {
t = dht11->edges[i].ts - dht11->edges[i-1].ts;
if (t > 0 && t < timeres)
timeres = t;