{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-52622",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid online resizing failures due to oversized flex bg\n\nWhen we online resize an ext4 filesystem with a oversized flexbg_size,\n\n     mkfs.ext4 -F -G 67108864 $dev -b 4096 100M\n     mount $dev $dir\n     resize2fs $dev 16G\n\nthe following WARN_ON is triggered:\n==================================================================\nWARNING: CPU: 0 PID: 427 at mm/page_alloc.c:4402 __alloc_pages+0x411/0x550\nModules linked in: sg(E)\nCPU: 0 PID: 427 Comm: resize2fs Tainted: G  E  6.6.0-rc5+ #314\nRIP: 0010:__alloc_pages+0x411/0x550\nCall Trace:\n <TASK>\n __kmalloc_large_node+0xa2/0x200\n __kmalloc+0x16e/0x290\n ext4_resize_fs+0x481/0xd80\n __ext4_ioctl+0x1616/0x1d90\n ext4_ioctl+0x12/0x20\n __x64_sys_ioctl+0xf0/0x150\n do_syscall_64+0x3b/0x90\n==================================================================\n\nThis is because flexbg_size is too large and the size of the new_group_data\narray to be allocated exceeds MAX_ORDER. Currently, the minimum value of\nMAX_ORDER is 8, the minimum value of PAGE_SIZE is 4096, the corresponding\nmaximum number of groups that can be allocated is:\n\n (PAGE_SIZE << MAX_ORDER) / sizeof(struct ext4_new_group_data) \u2248 21845\n\nAnd the value that is down-aligned to the power of 2 is 16384. Therefore,\nthis value is defined as MAX_RESIZE_BG, and the number of groups added\neach time does not exceed this value during resizing, and is added multiple\ntimes to complete the online resizing. The difference is that the metadata\nin a flex_bg may be more dispersed."
            }
        ]
    },
    "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": "cd1f93ca97a9"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.19.307",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.269",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.210",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.149",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.77",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.16",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.7.4",
                                                        "lessThanOrEqual": "6.7.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.8",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
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                        ]
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            ]
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    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/cd1f93ca97a9136989f3bd2bf90696732a2ed644",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/cd1f93ca97a9136989f3bd2bf90696732a2ed644"
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                "url": "https://git.kernel.org/stable/c/b183fe8702e78bba3dcef8e7193cab6898abee07",
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                "name": "https://git.kernel.org/stable/c/b183fe8702e78bba3dcef8e7193cab6898abee07"
            },
            {
                "url": "https://git.kernel.org/stable/c/cfbbb3199e71b63fc26cee0ebff327c47128a1e8",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/cfbbb3199e71b63fc26cee0ebff327c47128a1e8"
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                "url": "https://git.kernel.org/stable/c/d76c8d7ffe163c6bf2f1ef680b0539c2b3902b90",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d76c8d7ffe163c6bf2f1ef680b0539c2b3902b90"
            },
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                "url": "https://git.kernel.org/stable/c/6d2cbf517dcabc093159cf138ad5712c9c7fa954",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/6d2cbf517dcabc093159cf138ad5712c9c7fa954"
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                "url": "https://git.kernel.org/stable/c/8b1413dbfe49646eda2c00c0f1144ee9d3368e0c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8b1413dbfe49646eda2c00c0f1144ee9d3368e0c"
            },
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/dc3e0f55bec4410f3d74352c4a7c79f518088ee2"
            },
            {
                "url": "https://git.kernel.org/stable/c/5d1935ac02ca5aee364a449a35e2977ea84509b0",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5d1935ac02ca5aee364a449a35e2977ea84509b0"
            },
            {
                "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
                "refsource": "MISC",
                "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
            },
            {
                "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html",
                "refsource": "MISC",
                "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
            }
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