From: Javier Carrasco Date: Tue, 3 Dec 2024 23:55:31 +0000 (+0100) Subject: iio: temperature: tmp006: fix information leak in triggered buffer X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2f43d5200c7330143089bfd1f2440753bac10617;p=users%2Fjedix%2Flinux-maple.git iio: temperature: tmp006: fix information leak in triggered buffer 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: 91f75ccf9f03 ("iio: temperature: tmp006: add triggered buffer support") Signed-off-by: Javier Carrasco Link: https://patch.msgid.link/20241204-iio_memset_scan_holes-v2-1-3f941592a76d@gmail.com Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/temperature/tmp006.c b/drivers/iio/temperature/tmp006.c index 0c844137d7aa9..02b27f471baae 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;