| From b4a69f7f29c8a459ad6b4d8a8b72450f1d9fd288 Mon Sep 17 00:00:00 2001 |
| From: Peter Shkenev <mustela@erminea.space> |
| Date: Thu, 17 Jul 2025 23:48:17 +0300 |
| Subject: drm/amdgpu: check if hubbub is NULL in debugfs/amdgpu_dm_capabilities |
| |
| From: Peter Shkenev <mustela@erminea.space> |
| |
| commit b4a69f7f29c8a459ad6b4d8a8b72450f1d9fd288 upstream. |
| |
| HUBBUB structure is not initialized on DCE hardware, so check if it is NULL |
| to avoid null dereference while accessing amdgpu_dm_capabilities file in |
| debugfs. |
| |
| Signed-off-by: Peter Shkenev <mustela@erminea.space> |
| Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
| Cc: stable@vger.kernel.org |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c |
| +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c |
| @@ -3932,7 +3932,7 @@ static int capabilities_show(struct seq_ |
| |
| struct hubbub *hubbub = dc->res_pool->hubbub; |
| |
| - if (hubbub->funcs->get_mall_en) |
| + if (hubbub && hubbub->funcs->get_mall_en) |
| hubbub->funcs->get_mall_en(hubbub, &mall_in_use); |
| |
| if (dc->cap_funcs.get_subvp_en) |
