drm/amdgpu: Fix out-of-bounds read of df_v1_7_channel_number

[ Upstream commit d768394 ] Check the fb_channel_number range to avoid the array out-of-bounds read error Signed-off-by: Ma Jun <[email protected]> Reviewed-by: Tim Huang <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Sasha Levin <[email protected]>
xanmod · Sep 8, 2024 · db7a866 · db7a866
1 parent a914c14
commit db7a866
Showing 1 changed file with 2 additions and 0 deletions.
diff --git 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];
 }