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| author | Aleksandr Mishin <amishin@t-argos.ru> | 2024-04-09 10:56:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 10:49:39 +0300 |
| commit | 2a345fe928c21de6f3c3c7230ff509d715153a31 (patch) | |
| tree | d2c48463df725314784707de7f9d05dcd83153a2 | |
| parent | b77620730f614059db2470e8ebab3e725280fc6d (diff) | |
| download | linux-2a345fe928c21de6f3c3c7230ff509d715153a31.tar.xz | |
drm: vc4: Fix possible null pointer dereference
[ Upstream commit c534b63bede6cb987c2946ed4d0b0013a52c5ba7 ]
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@t-argos.ru>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409075622.11783-1-amishin@t-argos.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hdmi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index f827f2654364..eff47465707b 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -2739,6 +2739,8 @@ 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; |