From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: [PATCH AUTOSEL 5.5 437/542] platform/x86: intel_mid_powerbtn: Take a copy of ddata Date: Fri, 14 Feb 2020 10:47:09 -0500 Message-ID: <20200214154854.6746-437-sashal@kernel.org> References: <20200214154854.6746-1-sashal@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200214154854.6746-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mika Westerberg , Andy Shevchenko , Sasha Levin , platform-driver-x86@vger.kernel.org List-Id: platform-driver-x86.vger.kernel.org From: Mika Westerberg [ Upstream commit 5e0c94d3aeeecc68c573033f08d9678fecf253bd ] 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 Reviewed-by: Andy Shevchenko Signed-off-by: Andy Shevchenko Signed-off-by: Sasha Levin --- drivers/platform/x86/intel_mid_powerbtn.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel_mid_powerbtn.c b/drivers/platform/x86/intel_mid_powerbtn.c index 292bace83f1e3..6f436836fe501 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; -- 2.20.1