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drm/amd/pp: Fix potential NULL pointer dereference in atomctrl_initialize_mc_reg_table

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[ Upstream commit 820116a39f96bdc7d426c33a804b52f53700a919 ]

The function atomctrl_initialize_mc_reg_table() and
atomctrl_initialize_mc_reg_table_v2_2() does not check the return
value of smu_atom_get_data_table(). If smu_atom_get_data_table()
fails to retrieve vram_info, it returns NULL which is later
dereferenced.

Fixes: b3892e2bb5 ("drm/amd/pp: Use atombios api directly in powerplay (v2)")
Fixes: 5f92b48cf6 ("drm/amd/pm: add mc register table initialization")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Charles Han
2025-03-27 12:04:35 +08:00
committed by Greg Kroah-Hartman
parent 079cc1fa46
commit cdf7e1ff99
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/amd/pm/powerplay/hwmgr/ppatomctrl.c
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@@ -144,6 +144,10 @@ int atomctrl_initialize_mc_reg_table(
vram_info = (ATOM_VRAM_INFO_HEADER_V2_1 *)
smu_atom_get_data_table(hwmgr->adev,
GetIndexIntoMasterTable(DATA, VRAM_Info), &size, &frev, &crev);
if (!vram_info) {
pr_err("Could not retrieve the VramInfo table!");
return -EINVAL;
}
if (module_index >= vram_info->ucNumOfVRAMModule) {
pr_err("Invalid VramInfo table.");
@@ -181,6 +185,10 @@ int atomctrl_initialize_mc_reg_table_v2_2(
vram_info = (ATOM_VRAM_INFO_HEADER_V2_2 *)
smu_atom_get_data_table(hwmgr->adev,
GetIndexIntoMasterTable(DATA, VRAM_Info), &size, &frev, &crev);
if (!vram_info) {
pr_err("Could not retrieve the VramInfo table!");
return -EINVAL;
}
if (module_index >= vram_info->ucNumOfVRAMModule) {
pr_err("Invalid VramInfo table.");