Messages in this thread Patch in this message | | | From | Colin King <> | Subject | [PATCH] [media] VPU: mediatek: fix dereference of pdev before checking it is null | Date | Wed, 16 Nov 2016 19:16:50 +0000 |
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From: Colin Ian King <colin.king@canonical.com>
pdev is dereferenced using platform_get_drvdata before a check to see if it is null, hence there could be a potential null pointer dereference issue. Instead, first check if pdev is null and only then deference pdev when initializing vpu.
Found with static analysis by CoverityScan, CID 1357797
Signed-off-by: Colin Ian King <colin.king@canonical.com> --- drivers/media/platform/mtk-vpu/mtk_vpu.c | 6 ++++-- 1 file changed, 4 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..41f31b2 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; @@ -533,6 +533,8 @@ int vpu_load_firmware(struct platform_device *pdev) dev_err(dev, "VPU platform device is invalid\n"); return -EINVAL; } + vpu = platform_get_drvdata(pdev); + run = &vpu->run; mutex_lock(&vpu->vpu_mutex); if (vpu->fw_loaded) { -- 2.10.2
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