CVE-2024-48881 (GCVE-0-2024-48881)
Vulnerability from cvelistv5
Published
2025-01-11 12:25
Modified
2025-05-04 12:59
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bcache: revert replacing IS_ERR_OR_NULL with IS_ERR again Commit 028ddcac477b ("bcache: Remove unnecessary NULL point check in node allocations") leads a NULL pointer deference in cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c->root)) 1722 list_add(&c->root->list, &c->btree_cache); >From the above code in cache_set_flush(), if previous registration code fails before allocating c->root, it is possible c->root is NULL as what it is initialized. __bch_btree_node_alloc() never returns NULL but c->root is possible to be NULL at above line 1721. This patch replaces IS_ERR() by IS_ERR_OR_NULL() to fix this.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0729029e647234fa1a94376b6edffec5c2cd75f6
Version: db9439cef0b5efccf8021fe89f4953e0f901e85b
Version: 991e9c186a8ac6ab272a86e0ddc6f9733c38b867
Version: 68118c339c6e1e16ae017bef160dbe28a27ae9c8
Version: 028ddcac477b691dd9205c92f991cc15259d033e
Version: 028ddcac477b691dd9205c92f991cc15259d033e
Version: 028ddcac477b691dd9205c92f991cc15259d033e
Version: fe75e8a0c20127a8dc95704f1a7ad6b82c9a0ef8
Version: 0cabf9e164660e8d66c4810396046383a1110a69
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    "dateReserved": "2025-01-09T09:50:31.739Z",
    "dateUpdated": "2025-05-04T12:59:05.443Z",
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El commit 028ddcac477b (\\\"bcache: eliminar la comprobaci\u00f3n innecesaria del punto NULL en las asignaciones de nodos\\\") conduce a una deferencia de puntero NULL en cache_set_flush(). 1721 if (!IS_ERR_OR_NULL(c-\u0026gt;root)) 1722 list_add(\u0026amp;c-\u0026gt;root-\u0026gt;list, \u0026amp;c-\u0026gt;btree_cache); \u0026gt;Del c\u00f3digo anterior en cache_set_flush(), si el c\u00f3digo de registro anterior falla antes de asignar c-\u0026gt;root, es posible que c-\u0026gt;root sea NULL como lo que se inicializa. __bch_btree_node_alloc() nunca devuelve NULL, pero es posible que c-\u0026gt;root sea NULL en la l\u00ednea 1721 anterior. 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  }
}


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