cve-2021-47583
Vulnerability from cvelistv5
Published
2024-06-19 14:53
Modified
2024-12-19 07:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: mxl111sf: change mutex_init() location Syzbot reported, that mxl111sf_ctrl_msg() uses uninitialized mutex. The problem was in wrong mutex_init() location. Previous mutex_init(&state->msg_lock) call was in ->init() function, but dvb_usbv2_init() has this order of calls: dvb_usbv2_init() dvb_usbv2_adapter_init() dvb_usbv2_adapter_frontend_init() props->frontend_attach() props->init() Since mxl111sf_* devices call mxl111sf_ctrl_msg() in ->frontend_attach() internally we need to initialize state->msg_lock before frontend_attach(). To achieve it, ->probe() call added to all mxl111sf_* devices, which will simply initiaize mutex.
Impacted products
Vendor Product Version
Linux Linux Version: 8572211842afc53c8450fb470f2b8d02ba7592e0
Version: 8572211842afc53c8450fb470f2b8d02ba7592e0
Version: 8572211842afc53c8450fb470f2b8d02ba7592e0
Version: 8572211842afc53c8450fb470f2b8d02ba7592e0
Version: 8572211842afc53c8450fb470f2b8d02ba7592e0
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   Linux Linux Version: 3.7
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Show details on NVD website


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