From: Sylwester Nawrocki s.nawrocki@samsung.com
[ Upstream commit 7c1b9a5aeed91bef98988ac0fcf38c8c1f4f9a3a ]
This patch fixes potential NULL pointer dereference as indicated by the following static checker warning:
drivers/media/platform/exynos4-is/fimc-isp-video.c:408 isp_video_try_fmt_mplane() error: NULL dereference inside function '__isp_video_try_fmt(isp, &f->fmt.pix_mp, (0))()'.
Fixes: 34947b8aebe3: ("[media] exynos4-is: Add the FIMC-IS ISP capture DMA driver")
Reported-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Sylwester Nawrocki s.nawrocki@samsung.com Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- drivers/media/platform/exynos4-is/fimc-isp-video.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/media/platform/exynos4-is/fimc-isp-video.c b/drivers/media/platform/exynos4-is/fimc-isp-video.c index 400ce0cb0c0d..e00fa03ddc3e 100644 --- a/drivers/media/platform/exynos4-is/fimc-isp-video.c +++ b/drivers/media/platform/exynos4-is/fimc-isp-video.c @@ -384,12 +384,17 @@ static void __isp_video_try_fmt(struct fimc_isp *isp, struct v4l2_pix_format_mplane *pixm, const struct fimc_fmt **fmt) { - *fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2); + const struct fimc_fmt *__fmt; + + __fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2); + + if (fmt) + *fmt = __fmt;
pixm->colorspace = V4L2_COLORSPACE_SRGB; pixm->field = V4L2_FIELD_NONE; - pixm->num_planes = (*fmt)->memplanes; - pixm->pixelformat = (*fmt)->fourcc; + pixm->num_planes = __fmt->memplanes; + pixm->pixelformat = __fmt->fourcc; /* * TODO: double check with the docmentation these width/height * constraints are correct.