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iio: temperature: tmp006: fix information leak in triggered buffer

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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.

Fixes: 91f75ccf9f ("iio: temperature: tmp006: add triggered buffer support")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241204-iio_memset_scan_holes-v2-1-3f941592a76d@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Javier Carrasco 2024-12-04 00:55:31 +01:00 committed by Jonathan Cameron
parent 64f43895b4
commit 2f43d5200c
1 changed files with 2 additions and 0 deletions
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2
drivers/iio/temperature/tmp006.c
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@ -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;