lkml.org 
[lkml]   [2018]   [Feb]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 6/7] iio: adc: stm32-dfsdm: add check on max filter id
Date
reg property should be checked against number of available filters.
BTW, dfsdm->num_fls wasn't used. But it can be used for this purpose.
This prevents using data out of allocated dfsdm->fl_list array.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
drivers/iio/adc/stm32-dfsdm-adc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 57bcb45..1b78bec 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -1111,8 +1111,8 @@ static int stm32_dfsdm_adc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, adc);

ret = of_property_read_u32(dev->of_node, "reg", &adc->fl_id);
- if (ret != 0) {
- dev_err(dev, "Missing reg property\n");
+ if (ret != 0 || adc->fl_id >= adc->dfsdm->num_fls) {
+ dev_err(dev, "Missing or bad reg property\n");
return -EINVAL;
}

--
1.9.1
\
 
 \ /
  Last update: 2018-02-23 13:52    [W:0.137 / U:0.148 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site