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platform/x86: intel_mid_powerbtn: Take a copy of ddata

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commit 5e0c94d3aeeecc68c573033f08d9678fecf253bd upstream.

The driver gets driver_data from memory that is marked as const (which
is probably put to read-only memory) and it then modifies it. This
likely causes some sort of fault to happen.

Fix this by taking a copy of the structure.

Fixes: c94a8ff14d ("platform/x86: intel_mid_powerbtn: make mid_pb_ddata const")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2020-01-22 19:05:20 +03:00 • committed by Greg Kroah-Hartman
commit bc684844e7
1 changed files with 3 additions and 2 deletions
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5
drivers/platform/x86/intel_mid_powerbtn.c
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@ -146,9 +146,10 @@ static int mid_pb_probe(struct platform_device *pdev)
input_set_capability(input, EV_KEY, KEY_POWER);
ddata = (struct mid_pb_ddata *)id->driver_data;
ddata = devm_kmemdup(&pdev->dev, (void *)id->driver_data,
sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENODATA;
return -ENOMEM;
ddata->dev = &pdev->dev;
ddata->irq = irq;