From: Zhipeng Lu Date: Thu, 14 Dec 2023 16:59:38 +0000 (+0800) Subject: drm/amd/pm: fix a double-free in amdgpu_parse_extended_power_table X-Git-Tag: v6.6.17~1075 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0c5d08b1c98e5dbb0cf56cb99c45adec887790ce;p=platform%2Fkernel%2Flinux-rpi.git drm/amd/pm: fix a double-free in amdgpu_parse_extended_power_table [ Upstream commit a6582701178a47c4d0cb2188c965c59c0c0647c8 ] The amdgpu_free_extended_power_table is called in every error-handling paths of amdgpu_parse_extended_power_table. However, after the following call chain of returning: amdgpu_parse_extended_power_table |-> kv_dpm_init / si_dpm_init (the only two caller of amdgpu_parse_extended_power_table) |-> kv_dpm_sw_init / si_dpm_sw_init (the only caller of kv_dpm_init / si_dpm_init, accordingly) |-> kv_dpm_fini / si_dpm_fini (goto dpm_failed in xx_dpm_sw_init) |-> amdgpu_free_extended_power_table As above, the amdgpu_free_extended_power_table is called twice in this returning chain and thus a double-free is triggered. Similarily, the last kfree in amdgpu_parse_extended_power_table also cause a double free with amdgpu_free_extended_power_table in kv_dpm_fini. Fixes: 84176663e70d ("drm/amd/pm: create a new holder for those APIs used only by legacy ASICs(si/kv)") Signed-off-by: Zhipeng Lu Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c index 81fb4e5..6037774 100644 --- a/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c +++ b/drivers/gpu/drm/amd/pm/legacy-dpm/legacy_dpm.c @@ -272,10 +272,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) le16_to_cpu(power_info->pplib4.usVddcDependencyOnSCLKOffset)); ret = amdgpu_parse_clk_voltage_dep_table(&adev->pm.dpm.dyn_state.vddc_dependency_on_sclk, dep_table); - if (ret) { - amdgpu_free_extended_power_table(adev); + if (ret) return ret; - } } if (power_info->pplib4.usVddciDependencyOnMCLKOffset) { dep_table = (ATOM_PPLIB_Clock_Voltage_Dependency_Table *) @@ -283,10 +281,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) le16_to_cpu(power_info->pplib4.usVddciDependencyOnMCLKOffset)); ret = amdgpu_parse_clk_voltage_dep_table(&adev->pm.dpm.dyn_state.vddci_dependency_on_mclk, dep_table); - if (ret) { - amdgpu_free_extended_power_table(adev); + if (ret) return ret; - } } if (power_info->pplib4.usVddcDependencyOnMCLKOffset) { dep_table = (ATOM_PPLIB_Clock_Voltage_Dependency_Table *) @@ -294,10 +290,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) le16_to_cpu(power_info->pplib4.usVddcDependencyOnMCLKOffset)); ret = amdgpu_parse_clk_voltage_dep_table(&adev->pm.dpm.dyn_state.vddc_dependency_on_mclk, dep_table); - if (ret) { - amdgpu_free_extended_power_table(adev); + if (ret) return ret; - } } if (power_info->pplib4.usMvddDependencyOnMCLKOffset) { dep_table = (ATOM_PPLIB_Clock_Voltage_Dependency_Table *) @@ -305,10 +299,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) le16_to_cpu(power_info->pplib4.usMvddDependencyOnMCLKOffset)); ret = amdgpu_parse_clk_voltage_dep_table(&adev->pm.dpm.dyn_state.mvdd_dependency_on_mclk, dep_table); - if (ret) { - amdgpu_free_extended_power_table(adev); + if (ret) return ret; - } } if (power_info->pplib4.usMaxClockVoltageOnDCOffset) { ATOM_PPLIB_Clock_Voltage_Limit_Table *clk_v = @@ -339,10 +331,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) kcalloc(psl->ucNumEntries, sizeof(struct amdgpu_phase_shedding_limits_entry), GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.phase_shedding_limits_table.entries) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.phase_shedding_limits_table.entries) return -ENOMEM; - } entry = &psl->entries[0]; for (i = 0; i < psl->ucNumEntries; i++) { @@ -383,10 +373,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) ATOM_PPLIB_CAC_Leakage_Record *entry; u32 size = cac_table->ucNumEntries * sizeof(struct amdgpu_cac_leakage_table); adev->pm.dpm.dyn_state.cac_leakage_table.entries = kzalloc(size, GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.cac_leakage_table.entries) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.cac_leakage_table.entries) return -ENOMEM; - } entry = &cac_table->entries[0]; for (i = 0; i < cac_table->ucNumEntries; i++) { if (adev->pm.dpm.platform_caps & ATOM_PP_PLATFORM_CAP_EVV) { @@ -438,10 +426,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) sizeof(struct amdgpu_vce_clock_voltage_dependency_entry); adev->pm.dpm.dyn_state.vce_clock_voltage_dependency_table.entries = kzalloc(size, GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.vce_clock_voltage_dependency_table.entries) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.vce_clock_voltage_dependency_table.entries) return -ENOMEM; - } adev->pm.dpm.dyn_state.vce_clock_voltage_dependency_table.count = limits->numEntries; entry = &limits->entries[0]; @@ -493,10 +479,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) sizeof(struct amdgpu_uvd_clock_voltage_dependency_entry); adev->pm.dpm.dyn_state.uvd_clock_voltage_dependency_table.entries = kzalloc(size, GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.uvd_clock_voltage_dependency_table.entries) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.uvd_clock_voltage_dependency_table.entries) return -ENOMEM; - } adev->pm.dpm.dyn_state.uvd_clock_voltage_dependency_table.count = limits->numEntries; entry = &limits->entries[0]; @@ -525,10 +509,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) sizeof(struct amdgpu_clock_voltage_dependency_entry); adev->pm.dpm.dyn_state.samu_clock_voltage_dependency_table.entries = kzalloc(size, GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.samu_clock_voltage_dependency_table.entries) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.samu_clock_voltage_dependency_table.entries) return -ENOMEM; - } adev->pm.dpm.dyn_state.samu_clock_voltage_dependency_table.count = limits->numEntries; entry = &limits->entries[0]; @@ -548,10 +530,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) le16_to_cpu(ext_hdr->usPPMTableOffset)); adev->pm.dpm.dyn_state.ppm_table = kzalloc(sizeof(struct amdgpu_ppm_table), GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.ppm_table) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.ppm_table) return -ENOMEM; - } adev->pm.dpm.dyn_state.ppm_table->ppm_design = ppm->ucPpmDesign; adev->pm.dpm.dyn_state.ppm_table->cpu_core_number = le16_to_cpu(ppm->usCpuCoreNumber); @@ -583,10 +563,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) sizeof(struct amdgpu_clock_voltage_dependency_entry); adev->pm.dpm.dyn_state.acp_clock_voltage_dependency_table.entries = kzalloc(size, GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.acp_clock_voltage_dependency_table.entries) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.acp_clock_voltage_dependency_table.entries) return -ENOMEM; - } adev->pm.dpm.dyn_state.acp_clock_voltage_dependency_table.count = limits->numEntries; entry = &limits->entries[0]; @@ -606,10 +584,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) ATOM_PowerTune_Table *pt; adev->pm.dpm.dyn_state.cac_tdp_table = kzalloc(sizeof(struct amdgpu_cac_tdp_table), GFP_KERNEL); - if (!adev->pm.dpm.dyn_state.cac_tdp_table) { - amdgpu_free_extended_power_table(adev); + if (!adev->pm.dpm.dyn_state.cac_tdp_table) return -ENOMEM; - } if (rev > 0) { ATOM_PPLIB_POWERTUNE_Table_V1 *ppt = (ATOM_PPLIB_POWERTUNE_Table_V1 *) (mode_info->atom_context->bios + data_offset + @@ -645,10 +621,8 @@ int amdgpu_parse_extended_power_table(struct amdgpu_device *adev) ret = amdgpu_parse_clk_voltage_dep_table( &adev->pm.dpm.dyn_state.vddgfx_dependency_on_sclk, dep_table); - if (ret) { - kfree(adev->pm.dpm.dyn_state.vddgfx_dependency_on_sclk.entries); + if (ret) return ret; - } } }