From: Colin King <colin.king@canonical.com>
To: Mauro Carvalho Chehab <mchehab@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Hans Verkuil <hans.verkuil@cisco.com>,
Wei Yongjun <yongjun_wei@trendmicro.com.cn>,
Tiffany Lin <tiffany.lin@mediatek.com>,
Andrew-CT Chen <andrew-ct.chen@mediatek.com>,
linux-media@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] [media] VPU: mediatek: fix null pointer dereference on pdev
Date: Wed, 7 Sep 2016 18:10:27 +0100 [thread overview]
Message-ID: <20160907171027.16424-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
pdev is being null checked, however, prior to that it is being
dereferenced by platform_get_drvdata. Move the assignments of
vpu and run to after the pdev null check to avoid a potential
null pointer dereference.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/media/platform/mtk-vpu/mtk_vpu.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/mtk-vpu/mtk_vpu.c b/drivers/media/platform/mtk-vpu/mtk_vpu.c
index c9bf58c..43907a3 100644
--- a/drivers/media/platform/mtk-vpu/mtk_vpu.c
+++ b/drivers/media/platform/mtk-vpu/mtk_vpu.c
@@ -523,9 +523,9 @@ static int load_requested_vpu(struct mtk_vpu *vpu,
int vpu_load_firmware(struct platform_device *pdev)
{
- struct mtk_vpu *vpu = platform_get_drvdata(pdev);
+ struct mtk_vpu *vpu;
struct device *dev = &pdev->dev;
- struct vpu_run *run = &vpu->run;
+ struct vpu_run *run;
const struct firmware *vpu_fw = NULL;
int ret;
@@ -534,6 +534,9 @@ int vpu_load_firmware(struct platform_device *pdev)
return -EINVAL;
}
+ vpu = platform_get_drvdata(pdev);
+ run = &vpu->run;
+
mutex_lock(&vpu->vpu_mutex);
if (vpu->fw_loaded) {
mutex_unlock(&vpu->vpu_mutex);
--
2.9.3
next reply other threads:[~2016-09-07 17:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-07 17:10 Colin King [this message]
2016-09-08 5:21 ` [PATCH] [media] VPU: mediatek: fix null pointer dereference on pdev Tiffany Lin
2016-09-09 1:25 ` andrew-ct chen
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