cve-2024-42102
Vulnerability from cvelistv5
Published
2024-07-30 07:45
Modified
2024-11-05 09:37
Severity ?
Summary
Revert "mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again"
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website


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La l\u00f3gica de limitaci\u00f3n sucia supone que los l\u00edmites sucios en las unidades de p\u00e1ginas caben en 32 bits. Esta serie de parches garantiza que esto sea cierto (consulte el parche 2/2 para obtener m\u00e1s detalles). Este parche (de 2): esto revierte la confirmaci\u00f3n 9319b647902cbd5cc884ac08a8a6d54ce111fc78. El compromiso se rompe de varias maneras. En primer lugar, la conversi\u00f3n eliminada (u64) de la multiplicaci\u00f3n introducir\u00e1 un desbordamiento de multiplicaci\u00f3n en arcos de 32 bits si wb_thresh * bg_thresh \u0026gt;= 1\u0026lt;\u0026lt;32 (lo cual es realmente com\u00fan; la configuraci\u00f3n predeterminada con 4 GB de RAM activar\u00e1 esto). En segundo lugar, div64_u64() es innecesariamente caro en arcos de 32 bits. Tenemos div64_ul() en caso de que queramos ser seguros y econ\u00f3micos. 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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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