cve-2021-47583
Vulnerability from cvelistv5
Published
2024-06-19 14:53
Modified
2024-11-04 12:08
Severity ?
Summary
media: mxl111sf: change mutex_init() location
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09baPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/44870a9e7a3c24acbb3f888b2a7cc22c9bdf7e7fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4b2d9600b31f9ba7adbc9f3c54a068615d27b390Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8c6fdf62bfe1bc72bfceeaf832ef7499c7ed09baPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/96f182c9f48b984447741f054ec301fdc8517035Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b99bdf127af91d53919e96292c05f737c45ea59aPatch
Impacted products
Vendor Product Version
Linux Linux Version: 3.7
Show details on NVD website

To clipboard 

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The problem was in wrong mutex_init() location.\\n\\nPrevious mutex_init(\u0026state-\u003emsg_lock) call was in -\u003einit() function, but\\ndvb_usbv2_init() has this order of calls:\\n\\n\\tdvb_usbv2_init()\\n\\t  dvb_usbv2_adapter_init()\\n\\t    dvb_usbv2_adapter_frontend_init()\\n\\t      props-\u003efrontend_attach()\\n\\n\\t  props-\u003einit()\\n\\nSince mxl111sf_* devices call mxl111sf_ctrl_msg() in -\u003efrontend_attach()\\ninternally we need to initialize state-\u003emsg_lock before\\nfrontend_attach(). To achieve it, -\u003eprobe() call added to all mxl111sf_*\\ndevices, which will simply initiaize mutex.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: medio: mxl111sf: cambiar la ubicaci\u00f3n de mutex_init() Syzbot inform\u00f3 que mxl111sf_ctrl_msg() usa un mutex no inicializado. El problema estaba en la ubicaci\u00f3n mutex_init() incorrecta. La llamada anterior a mutex_init(\u0026amp;state-\u0026gt;msg_lock) estaba en la funci\u00f3n -\u0026gt;init(), pero dvb_usbv2_init() tiene este orden de llamadas: dvb_usbv2_init() dvb_usbv2_adapter_init() dvb_usbv2_adapter_frontend_init() props-\u0026gt;frontend_attach() props-\u0026gt;init() Desde Los dispositivos mxl111sf_* llaman a mxl111sf_ctrl_msg() en -\u0026gt;frontend_attach() internamente, necesitamos inicializar state-\u0026gt;msg_lock antes de frontend_attach(). 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}


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