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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2020-01-22 19:05:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-14 16:34:12 -0500 |
| commit | bc684844e7e09d384ee838a80c894a1735bb0645 (patch) | |
| tree | ec61b1e470f86f1fe1db5f5bfbcd86ebbfe5e16f /drivers/platform | |
| parent | b09e3d3e79cf9c0cb11768eb60a27e35720d7e26 (diff) | |
| download | linux-bc684844e7e09d384ee838a80c894a1735bb0645.tar.gz linux-bc684844e7e09d384ee838a80c894a1735bb0645.tar.bz2 linux-bc684844e7e09d384ee838a80c894a1735bb0645.zip | |
platform/x86: intel_mid_powerbtn: Take a copy of ddata
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: c94a8ff14de3 ("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>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/intel_mid_powerbtn.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/platform/x86/intel_mid_powerbtn.c b/drivers/platform/x86/intel_mid_powerbtn.c index 292bace83f1e..6f436836fe50 100644 --- a/drivers/platform/x86/intel_mid_powerbtn.c +++ b/drivers/platform/x86/intel_mid_powerbtn.c @@ -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; |