6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ma Jun Jun.Ma2@amd.com
[ Upstream commit d768394fa99467bcf2703bde74ddc96eeb0b71fa ]
Check the fb_channel_number range to avoid the array out-of-bounds read error
Signed-off-by: Ma Jun Jun.Ma2@amd.com Reviewed-by: Tim Huang Tim.Huang@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/df_v1_7.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/df_v1_7.c b/drivers/gpu/drm/amd/amdgpu/df_v1_7.c index 5dfab80ffff2..cd298556f7a6 100644 --- a/drivers/gpu/drm/amd/amdgpu/df_v1_7.c +++ b/drivers/gpu/drm/amd/amdgpu/df_v1_7.c @@ -70,6 +70,8 @@ static u32 df_v1_7_get_hbm_channel_number(struct amdgpu_device *adev) int fb_channel_number;
fb_channel_number = adev->df.funcs->get_fb_channel_number(adev); + if (fb_channel_number >= ARRAY_SIZE(df_v1_7_channel_number)) + fb_channel_number = 0;
return df_v1_7_channel_number[fb_channel_number]; }