drm/amd/pm: fix a double-free in si_dpm_init
[ Upstream commit ac16667237a82e2597e329eb9bc520d1cf9dff30 ]
When the allocation of
adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries fails,
amdgpu_free_extended_power_table is called to free some fields of adev.
However, when the control flow returns to si_dpm_sw_init, it goes to
label dpm_failed and calls si_dpm_fini, which calls
amdgpu_free_extended_power_table again and free those fields again. Thus
a double-free is triggered.
Fixes: 841686df9f7d ("drm/amdgpu: add SI DPM support (v4)")
Signed-off-by: Zhipeng Lu <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
diff --git a/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c b/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c
index d6544a6..6f0653c 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/si_dpm.c
@@ -7349,10 +7349,9 @@ static int si_dpm_init(struct amdgpu_device *adev)
kcalloc(4,
sizeof(struct amdgpu_clock_voltage_dependency_entry),
GFP_KERNEL);
- if (!adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries) {
- amdgpu_free_extended_power_table(adev);
+ if (!adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries)
return -ENOMEM;
- }
+
adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.count = 4;
adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries[0].clk = 0;
adev->pm.dpm.dyn_state.vddc_dependency_on_dispclk.entries[0].v = 0;
