{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47535",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/a6xx: Allocate enough space for GMU registers\n\nIn commit 142639a52a01 (\"drm/msm/a6xx: fix crashstate capture for\nA650\") we changed a6xx_get_gmu_registers() to read 3 sets of\nregisters. Unfortunately, we didn't change the memory allocation for\nthe array. That leads to a KASAN warning (this was on the chromeos-5.4\nkernel, which has the problematic commit backported to it):\n\n  BUG: KASAN: slab-out-of-bounds in _a6xx_get_gmu_registers+0x144/0x430\n  Write of size 8 at addr ffffff80c89432b0 by task A618-worker/209\n  CPU: 5 PID: 209 Comm: A618-worker Tainted: G        W         5.4.156-lockdep #22\n  Hardware name: Google Lazor Limozeen without Touchscreen (rev5 - rev8) (DT)\n  Call trace:\n   dump_backtrace+0x0/0x248\n   show_stack+0x20/0x2c\n   dump_stack+0x128/0x1ec\n   print_address_description+0x88/0x4a0\n   __kasan_report+0xfc/0x120\n   kasan_report+0x10/0x18\n   __asan_report_store8_noabort+0x1c/0x24\n   _a6xx_get_gmu_registers+0x144/0x430\n   a6xx_gpu_state_get+0x330/0x25d4\n   msm_gpu_crashstate_capture+0xa0/0x84c\n   recover_worker+0x328/0x838\n   kthread_worker_fn+0x32c/0x574\n   kthread+0x2dc/0x39c\n   ret_from_fork+0x10/0x18\n\n  Allocated by task 209:\n   __kasan_kmalloc+0xfc/0x1c4\n   kasan_kmalloc+0xc/0x14\n   kmem_cache_alloc_trace+0x1f0/0x2a0\n   a6xx_gpu_state_get+0x164/0x25d4\n   msm_gpu_crashstate_capture+0xa0/0x84c\n   recover_worker+0x328/0x838\n   kthread_worker_fn+0x32c/0x574\n   kthread+0x2dc/0x39c\n   ret_from_fork+0x10/0x18"
            }
        ]
    },
    "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": "142639a52a01",
                                            "version_value": "d646856a600e"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.9",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.9",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.84",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.7",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.16",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8"
            },
            {
                "url": "https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538"
            },
            {
                "url": "https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
    }
}