{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-52813",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: pcrypt - Fix hungtask for PADATA_RESET\n\nWe found a hungtask bug in test_aead_vec_cfg as follows:\n\nINFO: task cryptomgr_test:391009 blocked for more than 120 seconds.\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\nCall trace:\n __switch_to+0x98/0xe0\n __schedule+0x6c4/0xf40\n schedule+0xd8/0x1b4\n schedule_timeout+0x474/0x560\n wait_for_common+0x368/0x4e0\n wait_for_completion+0x20/0x30\n wait_for_completion+0x20/0x30\n test_aead_vec_cfg+0xab4/0xd50\n test_aead+0x144/0x1f0\n alg_test_aead+0xd8/0x1e0\n alg_test+0x634/0x890\n cryptomgr_test+0x40/0x70\n kthread+0x1e0/0x220\n ret_from_fork+0x10/0x18\n Kernel panic - not syncing: hung_task: blocked tasks\n\nFor padata_do_parallel, when the return err is 0 or -EBUSY, it will call\nwait_for_completion(&wait->completion) in test_aead_vec_cfg. In normal\ncase, aead_request_complete() will be called in pcrypt_aead_serial and the\nreturn err is 0 for padata_do_parallel. But, when pinst->flags is\nPADATA_RESET, the return err is -EBUSY for padata_do_parallel, and it\nwon't call aead_request_complete(). Therefore, test_aead_vec_cfg will\nhung at wait_for_completion(&wait->completion), which will cause\nhungtask.\n\nThe problem comes as following:\n(padata_do_parallel)                 |\n    rcu_read_lock_bh();              |\n    err = -EINVAL;                   |   (padata_replace)\n                                     |     pinst->flags |= PADATA_RESET;\n    err = -EBUSY                     |\n    if (pinst->flags & PADATA_RESET) |\n        rcu_read_unlock_bh()         |\n        return err\n\nIn order to resolve the problem, we replace the return err -EBUSY with\n-EAGAIN, which means parallel_data is changing, and the caller should call\nit again.\n\nv3:\nremove retry and just change the return err.\nv2:\nintroduce padata_try_do_parallel() in pcrypt_aead_encrypt and\npcrypt_aead_decrypt to solve the hungtask."
            }
        ]
    },
    "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": "fb2d3a50a8f2"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.14.331",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.300",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.262",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.202",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.140",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.64",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.5.13",
                                                        "lessThanOrEqual": "6.5.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.3",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.7",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/fb2d3a50a8f29a3c66682bb426144f40e32ab818"
            },
            {
                "url": "https://git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/039fec48e062504f14845124a1a25eb199b2ddc0"
            },
            {
                "url": "https://git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c9c1334697301c10e6918d747ed38abfbc0c96e7"
            },
            {
                "url": "https://git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e97bf4ada7dddacd184c3e196bd063b0dc71b41d"
            },
            {
                "url": "https://git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/546c1796ad1ed0d87dab3c4b5156d75819be2316"
            },
            {
                "url": "https://git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c55fc098fd9d2dca475b82d00ffbcaf97879d77e"
            },
            {
                "url": "https://git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e134f3aba98e6c801a693f540912c2d493718ddf"
            },
            {
                "url": "https://git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/372636debe852913529b1716f44addd94fff2d28"
            },
            {
                "url": "https://git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8f4f68e788c3a7a696546291258bfa5fdb215523"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
    }
}