| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 135/355] media: s5p-mfc: fix possible null-pointer dereference in s5p_mfc_probe() | Date | Mon, 15 Nov 2021 18:00:59 +0100 |
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From: Tuo Li <islituo@gmail.com>
[ Upstream commit 8515965e5e33f4feb56134348c95953f3eadfb26 ]
The variable pdev is assigned to dev->plat_dev, and dev->plat_dev is checked in: if (!dev->plat_dev)
This indicates both dev->plat_dev and pdev can be NULL. If so, the function dev_err() is called to print error information. dev_err(&pdev->dev, "No platform data specified\n");
However, &pdev->dev is an illegal address, and it is dereferenced in dev_err().
To fix this possible null-pointer dereference, replace dev_err() with mfc_err().
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn> Signed-off-by: Tuo Li <islituo@gmail.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/media/platform/s5p-mfc/s5p_mfc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c index b776f83e395e0..f8a5ed6bb9d7a 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1279,7 +1279,7 @@ static int s5p_mfc_probe(struct platform_device *pdev) spin_lock_init(&dev->condlock); dev->plat_dev = pdev; if (!dev->plat_dev) { - dev_err(&pdev->dev, "No platform data specified\n"); + mfc_err("No platform data specified\n"); return -ENODEV; } -- 2.33.0
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