{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-56701",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Fix dtl_access_lock to be a rw_semaphore\n\nThe dtl_access_lock needs to be a rw_sempahore, a sleeping lock, because\nthe code calls kmalloc() while holding it, which can sleep:\n\n  # echo 1 > /proc/powerpc/vcpudispatch_stats\n  BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 199, name: sh\n  preempt_count: 1, expected: 0\n  3 locks held by sh/199:\n   #0: c00000000a0743f8 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x324/0x438\n   #1: c0000000028c7058 (dtl_enable_mutex){+.+.}-{3:3}, at: vcpudispatch_stats_write+0xd4/0x5f4\n   #2: c0000000028c70b8 (dtl_access_lock){+.+.}-{2:2}, at: vcpudispatch_stats_write+0x220/0x5f4\n  CPU: 0 PID: 199 Comm: sh Not tainted 6.10.0-rc4 #152\n  Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1202 0xf000005 of:SLOF,HEAD hv:linux,kvm pSeries\n  Call Trace:\n    dump_stack_lvl+0x130/0x148 (unreliable)\n    __might_resched+0x174/0x410\n    kmem_cache_alloc_noprof+0x340/0x3d0\n    alloc_dtl_buffers+0x124/0x1ac\n    vcpudispatch_stats_write+0x2a8/0x5f4\n    proc_reg_write+0xf4/0x150\n    vfs_write+0xfc/0x438\n    ksys_write+0x88/0x148\n    system_call_exception+0x1c4/0x5a0\n    system_call_common+0xf4/0x258"
            }
        ]
    },
    "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": "06220d78f24a20549757be1014e57c382406cc92",
                                            "version_value": "6956c0e7346ce1bbfc726755aa8da10d26e84276"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.3",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.3",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.231",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.15.174",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.1.120",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.6.64",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.11.11",
                                                        "lessThanOrEqual": "6.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.12.2",
                                                        "lessThanOrEqual": "6.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.13-rc1",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/6956c0e7346ce1bbfc726755aa8da10d26e84276",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/6956c0e7346ce1bbfc726755aa8da10d26e84276"
            },
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                "url": "https://git.kernel.org/stable/c/f6ec133668757f84e5143f1eb141fd0b83778b9e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/f6ec133668757f84e5143f1eb141fd0b83778b9e"
            },
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                "url": "https://git.kernel.org/stable/c/fa5b5ea257135e771b489c83a2e93b5935d0108e",
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                "name": "https://git.kernel.org/stable/c/fa5b5ea257135e771b489c83a2e93b5935d0108e"
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a246daa26b717e755ccc9061f47f7cd1c0b358dd"
            },
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                "url": "https://git.kernel.org/stable/c/b125d0cf1adde7b2b47d7337fed7e9133eea3463",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b125d0cf1adde7b2b47d7337fed7e9133eea3463"
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/525e18f1ba7c2b098c8ba587fb397efb34a6574c"
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/cadae3a45d23aa4f6485938a67cbc47aaaa25e38"
            }
        ]
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