CVE-2024-26775
Vulnerability from cvelistv5
Published
2024-04-03 17:01
Modified
2024-11-05 09:15
Severity ?
Summary
aoe: avoid potential deadlock at set_capacity
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19a77b27163820f793b4d022979ffdca8f659b77
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2d623c94fbba3554f4446ba6f3c764994e8b0d26
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/673629018ba04906899dcb631beec34d871f709c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e169bd4fb2b36c4b2bee63c35c740c85daeb2e86
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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                "id": "CVE-2024-26775",
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                    "Exploitation": "none"
                  },
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          "versions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naoe: avoid potential deadlock at set_capacity\n\nMove set_capacity() outside of the section procected by (\u0026d-\u003elock).\nTo avoid possible interrupt unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n[1] lock(\u0026bdev-\u003ebd_size_lock);\n                                local_irq_disable();\n                            [2] lock(\u0026d-\u003elock);\n                            [3] lock(\u0026bdev-\u003ebd_size_lock);\n   \u003cInterrupt\u003e\n[4]  lock(\u0026d-\u003elock);\n\n  *** DEADLOCK ***\n\nWhere [1](\u0026bdev-\u003ebd_size_lock) hold by zram_add()-\u003eset_capacity().\n[2]lock(\u0026d-\u003elock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc()\nis trying to acquire [3](\u0026bdev-\u003ebd_size_lock) at set_capacity() call.\nIn this situation an attempt to acquire [4]lock(\u0026d-\u003elock) from\naoecmd_cfg_rsp() will lead to deadlock.\n\nSo the simplest solution is breaking lock dependency\n[2](\u0026d-\u003elock) -\u003e [3](\u0026bdev-\u003ebd_size_lock) by moving set_capacity()\noutside."
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      "title": "aoe: avoid potential deadlock at set_capacity",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26775",
    "datePublished": "2024-04-03T17:01:01.299Z",
    "dateReserved": "2024-02-19T14:20:24.176Z",
    "dateUpdated": "2024-11-05T09:15:35.116Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26775\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T17:15:53.187\",\"lastModified\":\"2024-04-03T17:24:18.150\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naoe: avoid potential deadlock at set_capacity\\n\\nMove set_capacity() outside of the section procected by (\u0026d-\u003elock).\\nTo avoid possible interrupt unsafe locking scenario:\\n\\n        CPU0                    CPU1\\n        ----                    ----\\n[1] lock(\u0026bdev-\u003ebd_size_lock);\\n                                local_irq_disable();\\n                            [2] lock(\u0026d-\u003elock);\\n                            [3] lock(\u0026bdev-\u003ebd_size_lock);\\n   \u003cInterrupt\u003e\\n[4]  lock(\u0026d-\u003elock);\\n\\n  *** DEADLOCK ***\\n\\nWhere [1](\u0026bdev-\u003ebd_size_lock) hold by zram_add()-\u003eset_capacity().\\n[2]lock(\u0026d-\u003elock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc()\\nis trying to acquire [3](\u0026bdev-\u003ebd_size_lock) at set_capacity() call.\\nIn this situation an attempt to acquire [4]lock(\u0026d-\u003elock) from\\naoecmd_cfg_rsp() will lead to deadlock.\\n\\nSo the simplest solution is breaking lock dependency\\n[2](\u0026d-\u003elock) -\u003e [3](\u0026bdev-\u003ebd_size_lock) by moving set_capacity()\\noutside.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: aoe: evita un posible punto muerto en set_capacity Mueve set_capacity() fuera de la secci\u00f3n procesada por (\u0026amp;d-\u0026gt;lock). Para evitar una posible interrupci\u00f3n en un escenario de bloqueo inseguro: CPU0 CPU1 ---- ---- [1] lock(\u0026amp;bdev-\u0026gt;bd_size_lock); local_irq_disable(); [2] bloquear(\u0026amp;d-\u0026gt;bloquear); [3] bloquear(\u0026amp;bdev-\u0026gt;bd_size_lock);  [4] bloqueo(\u0026amp;d-\u0026gt;bloqueo); *** DEADLOCK *** Donde [1](\u0026amp;bdev-\u0026gt;bd_size_lock) mantenido por zram_add()-\u0026gt;set_capacity(). [2]bloqueo(\u0026amp;d-\u0026gt;bloqueo) retenido por aoeblk_gdalloc(). Y aoeblk_gdalloc() est\u00e1 intentando adquirir [3](\u0026amp;bdev-\u0026gt;bd_size_lock) en la llamada set_capacity(). En esta situaci\u00f3n, un intento de adquirir [4]lock(\u0026amp;d-\u0026gt;lock) de aoecmd_cfg_rsp() provocar\u00e1 un punto muerto. Entonces, la soluci\u00f3n m\u00e1s simple es romper la dependencia del bloqueo [2](\u0026amp;d-\u0026gt;lock) -\u0026gt; [3](\u0026amp;bdev-\u0026gt;bd_size_lock) moviendo set_capacity() afuera.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19a77b27163820f793b4d022979ffdca8f659b77\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2d623c94fbba3554f4446ba6f3c764994e8b0d26\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/673629018ba04906899dcb631beec34d871f709c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e169bd4fb2b36c4b2bee63c35c740c85daeb2e86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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