cvelist/2024/50xxx/CVE-2024-50177.json

{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-50177",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: fix a UBSAN warning in DML2.1\n\nWhen programming phantom pipe, since cursor_width is explicity set to 0,\nthis causes calculation logic to trigger overflow for an unsigned int\ntriggering the kernel's UBSAN check as below:\n\n[   40.962845] UBSAN: shift-out-of-bounds in /tmp/amd.EfpumTkO/amd/amdgpu/../display/dc/dml2/dml21/src/dml2_core/dml2_core_dcn4_calcs.c:3312:34\n[   40.962849] shift exponent 4294967170 is too large for 32-bit type 'unsigned int'\n[   40.962852] CPU: 1 PID: 1670 Comm: gnome-shell Tainted: G        W  OE      6.5.0-41-generic #41~22.04.2-Ubuntu\n[   40.962854] Hardware name: Gigabyte Technology Co., Ltd. X670E AORUS PRO X/X670E AORUS PRO X, BIOS F21 01/10/2024\n[   40.962856] Call Trace:\n[   40.962857]  <TASK>\n[   40.962860]  dump_stack_lvl+0x48/0x70\n[   40.962870]  dump_stack+0x10/0x20\n[   40.962872]  __ubsan_handle_shift_out_of_bounds+0x1ac/0x360\n[   40.962878]  calculate_cursor_req_attributes.cold+0x1b/0x28 [amdgpu]\n[   40.963099]  dml_core_mode_support+0x6b91/0x16bc0 [amdgpu]\n[   40.963327]  ? srso_alias_return_thunk+0x5/0x7f\n[   40.963331]  ? CalculateWatermarksMALLUseAndDRAMSpeedChangeSupport+0x18b8/0x2790 [amdgpu]\n[   40.963534]  ? srso_alias_return_thunk+0x5/0x7f\n[   40.963536]  ? dml_core_mode_support+0xb3db/0x16bc0 [amdgpu]\n[   40.963730]  dml2_core_calcs_mode_support_ex+0x2c/0x90 [amdgpu]\n[   40.963906]  ? srso_alias_return_thunk+0x5/0x7f\n[   40.963909]  ? dml2_core_calcs_mode_support_ex+0x2c/0x90 [amdgpu]\n[   40.964078]  core_dcn4_mode_support+0x72/0xbf0 [amdgpu]\n[   40.964247]  dml2_top_optimization_perform_optimization_phase+0x1d3/0x2a0 [amdgpu]\n[   40.964420]  dml2_build_mode_programming+0x23d/0x750 [amdgpu]\n[   40.964587]  dml21_validate+0x274/0x770 [amdgpu]\n[   40.964761]  ? srso_alias_return_thunk+0x5/0x7f\n[   40.964763]  ? resource_append_dpp_pipes_for_plane_composition+0x27c/0x3b0 [amdgpu]\n[   40.964942]  dml2_validate+0x504/0x750 [amdgpu]\n[   40.965117]  ? dml21_copy+0x95/0xb0 [amdgpu]\n[   40.965291]  ? srso_alias_return_thunk+0x5/0x7f\n[   40.965295]  dcn401_validate_bandwidth+0x4e/0x70 [amdgpu]\n[   40.965491]  update_planes_and_stream_state+0x38d/0x5c0 [amdgpu]\n[   40.965672]  update_planes_and_stream_v3+0x52/0x1e0 [amdgpu]\n[   40.965845]  ? srso_alias_return_thunk+0x5/0x7f\n[   40.965849]  dc_update_planes_and_stream+0x71/0xb0 [amdgpu]\n\nFix this by adding a guard for checking cursor width before triggering\nthe size calculation."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "1da177e4c3f4",
                                            "version_value": "27bc3da5eae5"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "6.11.3",
                                                        "lessThanOrEqual": "6.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.12-rc1",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/27bc3da5eae57e3af8f5648b4498ffde48781434",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/27bc3da5eae57e3af8f5648b4498ffde48781434"
            },
            {
                "url": "https://git.kernel.org/stable/c/eaf3adb8faab611ba57594fa915893fc93a7788c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/eaf3adb8faab611ba57594fa915893fc93a7788c"
            }
        ]
    },
    "generator": {
        "engine": "bippy-9e1c9544281a"
    }
}