diff options
| author | Nadezda Lutovinova <lutovinova@ispras.ru> | 2021-08-11 16:32:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:12 +0300 |
| commit | cdf5c3f846072f244cb66f34c2ef7b122ccca0a0 (patch) | |
| tree | e0bb07b6a09a8cfd812fc4f8868487da7e6f8d83 | |
| parent | bb2cb679699ee42aff4142d081c2a57655c06b6d (diff) | |
| download | linux-cdf5c3f846072f244cb66f34c2ef7b122ccca0a0.tar.xz | |
media: s5p-mfc: Add checking to s5p_mfc_probe().
[ Upstream commit cdfaf4752e6915a4b455ad4400133e540e4dc965 ]
If of_device_get_match_data() return NULL,
then null pointer dereference occurs in s5p_mfc_init_pm().
The patch adds checking if dev->variant is NULL.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Nadezda Lutovinova <lutovinova@ispras.ru>
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>
| -rw-r--r-- | drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c index c763c0a03140..f336a9543273 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c @@ -1288,6 +1288,10 @@ static int s5p_mfc_probe(struct platform_device *pdev) } dev->variant = of_device_get_match_data(&pdev->dev); + if (!dev->variant) { + dev_err(&pdev->dev, "Failed to get device MFC hardware variant information\n"); + return -ENOENT; + } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); dev->regs_base = devm_ioremap_resource(&pdev->dev, res); |