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[01/11] iio: temperature: tmp006: fix information leak in triggered buffer

Message ID 20241125-iio_memset_scan_holes-v1-1-0cb6e98d895c@gmail.com (mailing list archive)
State New
Headers show
Series iio: fix information leaks in triggered buffers | expand

Commit Message

Javier Carrasco Nov. 25, 2024, 9:16 p.m. UTC 
The 'scan' local struct is used to push data to user space from a
triggered buffer, but it has a hole between the two 16-bit data channels
and the timestamp. This hole is never initialized.

Initialize the struct to zero before using it to avoid pushing
uninitialized information to userspace.

Cc: stable@vger.kernel.org
Fixes: 91f75ccf9f03 ("iio: temperature: tmp006: add triggered buffer support")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 drivers/iio/temperature/tmp006.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/iio/temperature/tmp006.c b/drivers/iio/temperature/tmp006.c
index 0c844137d7aa..02b27f471baa 100644
--- a/drivers/iio/temperature/tmp006.c
+++ b/drivers/iio/temperature/tmp006.c
@@ -252,6 +252,8 @@  static irqreturn_t tmp006_trigger_handler(int irq, void *p)
 	} scan;
 	s32 ret;
 
+	memset(&scan, 0, sizeof(scan));
+
 	ret = i2c_smbus_read_word_data(data->client, TMP006_VOBJECT);
 	if (ret < 0)
 		goto err;