In vc4_hdmi_audio_init() of_get_address() may return
NULL which is later dereferenced. Fix this bug by adding NULL check.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: bb7d78568814 ("drm/vc4: Add HDMI audio support")
Signed-off-by: Aleksandr Mishin <amishin@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index d8751ea20303..5f8d51b29370 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -2740,6 +2740,8 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
index = 1;
addr = of_get_address(dev->of_node, index, NULL, NULL);
+ if (!addr)
+ return -EINVAL;
vc4_hdmi->audio.dma_data.addr = be32_to_cpup(addr) + mai_data->offset;
vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
--
2.30.2
