From: Tuo Li islituo@gmail.com
stable inclusion from stable-5.10.80 commit b570e36a779c981267400a40895dff42de1346e5 bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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 Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- 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 eba2b9f040df..c763c0a03140 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1283,7 +1283,7 @@ 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; }