From 936d3e536dcf88ce80d27bdb637009b13dba6d8c Mon Sep 17 00:00:00 2001
From: Young Xiao <92siuyang@gmail.com>
Date: Tue, 4 Jun 2019 20:40:00 +0800
Subject: [PATCH] iio:core: Fix bug in length of event info_mask and catch
unhandled bits set in masks.
The incorrect limit for the for_each_set_bit loop was noticed whilst fixing
this other case. Note that as we only have 3 possible entries a the moment
and the value was set to 4, the bug would not have any effect currently.
It will bite fairly soon though, so best fix it now.
See commit ef4b4856593f ("iio:core: Fix bug in length of event info_mask and
catch unhandled bits set in masks.") for details.
Signed-off-by: Young Xiao <92siuyang@gmail.com>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
drivers/iio/industrialio-core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index f5a4581302f48..dd8873a752dd4 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1107,6 +1107,8 @@ static int iio_device_add_info_mask_type_avail(struct iio_dev *indio_dev,
char *avail_postfix;
for_each_set_bit(i, infomask, sizeof(*infomask) * 8) {
+ if (i >= ARRAY_SIZE(iio_chan_info_postfix))
+ return -EINVAL;
avail_postfix = kasprintf(GFP_KERNEL,
"%s_available",
iio_chan_info_postfix[i]);
--
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