diff options
| author | Andrew Duggan <aduggan@synaptics.com> | 2019-11-04 16:07:30 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2019-11-04 16:11:50 -0800 |
| commit | 5d40d95e7e64756cc30606c2ba169271704d47cb (patch) | |
| tree | ddfe6d746b3120557fec0b75ec9508940a6a7acf /drivers/input | |
| parent | f6aabe1ff1d9d7bad0879253011216438bdb2530 (diff) | |
| download | linux-5d40d95e7e64756cc30606c2ba169271704d47cb.tar.gz | |
Input: synaptics-rmi4 - do not consume more data than we have (F11, F12)
Currently, rmi_f11_attention() and rmi_f12_attention() functions update the attn_data data pointer and size based on the size of the expected size of the attention data. However, if the actual valid data in the attn buffer is less then the expected value then the updated data pointer will point to memory beyond the end of the attn buffer. Using the calculated valid_bytes instead will prevent this from happening. Signed-off-by: Andrew Duggan <aduggan@synaptics.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191025002527.3189-3-aduggan@synaptics.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/rmi4/rmi_f11.c | 4 | ||||
| -rw-r--r-- | drivers/input/rmi4/rmi_f12.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/input/rmi4/rmi_f11.c b/drivers/input/rmi4/rmi_f11.c index f28a7158b2ef..26c239325f95 100644 --- a/drivers/input/rmi4/rmi_f11.c +++ b/drivers/input/rmi4/rmi_f11.c @@ -1284,8 +1284,8 @@ static irqreturn_t rmi_f11_attention(int irq, void *ctx) valid_bytes = f11->sensor.attn_size; memcpy(f11->sensor.data_pkt, drvdata->attn_data.data, valid_bytes); - drvdata->attn_data.data += f11->sensor.attn_size; - drvdata->attn_data.size -= f11->sensor.attn_size; + drvdata->attn_data.data += valid_bytes; + drvdata->attn_data.size -= valid_bytes; } else { error = rmi_read_block(rmi_dev, data_base_addr, f11->sensor.data_pkt, diff --git a/drivers/input/rmi4/rmi_f12.c b/drivers/input/rmi4/rmi_f12.c index 734077f2c40b..7e97944f7616 100644 --- a/drivers/input/rmi4/rmi_f12.c +++ b/drivers/input/rmi4/rmi_f12.c @@ -212,8 +212,8 @@ static irqreturn_t rmi_f12_attention(int irq, void *ctx) valid_bytes = sensor->attn_size; memcpy(sensor->data_pkt, drvdata->attn_data.data, valid_bytes); - drvdata->attn_data.data += sensor->attn_size; - drvdata->attn_data.size -= sensor->attn_size; + drvdata->attn_data.data += valid_bytes; + drvdata->attn_data.size -= valid_bytes; } else { retval = rmi_read_block(rmi_dev, f12->data_addr, sensor->data_pkt, sensor->pkt_size); |