fkie_cve-2022-49315
Vulnerability from fkie_nvd
Published
2025-02-26 07:01
Modified
2025-10-01 20:16
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drivers: staging: rtl8192e: Fix deadlock in rtllib_beacons_stop() There is a deadlock in rtllib_beacons_stop(), which is shown below: (Thread 1) | (Thread 2) | rtllib_send_beacon() rtllib_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | rtllib_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ... We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, rtllib_beacons_stop() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08bacf871c019163ccd1389d0bc957a43324967aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f69d7d5e918aa43423d86bd17ddb11b1b5e8adaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/381045dc64d23a2229c47c5524c06bfc33d34446Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4681129fda9e8555392eaaadb239ec6a6e2b3e12Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46c861009bf437a18417df24cea0d181741b7d72Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64b05fa212c7e4d057676e8b7e7120c6eb2f615bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b6bdbd9337de3917945847bde262a34a87a6303Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fef451f0fbbe85dbd2962b18379d02e2965610dbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ffd4c4d5293e4985092ea45ba21cad9326e2e434Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8192e: Fix deadlock in rtllib_beacons_stop()\n\nThere is a deadlock in rtllib_beacons_stop(), which is shown\nbelow:\n\n   (Thread 1)              |      (Thread 2)\n                           | rtllib_send_beacon()\nrtllib_beacons_stop()      |  mod_timer()\n spin_lock_irqsave() //(1) |  (wait a time)\n ...                       | rtllib_send_beacon_cb()\n del_timer_sync()          |  spin_lock_irqsave() //(2)\n (wait timer to stop)      |  ...\n\nWe hold ieee-\u003ebeacon_lock in position (1) of thread 1 and\nuse del_timer_sync() to wait timer to stop, but timer handler\nalso need ieee-\u003ebeacon_lock in position (2) of thread 2.\nAs a result, rtllib_beacons_stop() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drivers: staging: rtl8192e: Corregir bloqueo en rtllib_beacons_stop() Hay un bloqueo en rtllib_beacons_stop(), que se muestra a continuaci\u00f3n: (Hilo 1) | (Hilo 2) | rtllib_send_beacon() rtllib_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (esperar un tiempo) ... | rtllib_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (esperar que el temporizador se detenga) | ... Mantenemos ieee-\u0026gt;beacon_lock en la posici\u00f3n (1) del hilo 1 y usamos del_timer_sync() para esperar a que el temporizador se detenga, pero el controlador del temporizador tambi\u00e9n necesita ieee-\u0026gt;beacon_lock en la posici\u00f3n (2) del hilo 2. Como resultado, rtllib_beacons_stop() se bloquear\u00e1 para siempre. Este parche extrae del_timer_sync() de la protecci\u00f3n de spin_lock_irqsave(), lo que podr\u00eda permitir que el controlador del temporizador obtenga el bloqueo necesario."
    }
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  "id": "CVE-2022-49315",
  "lastModified": "2025-10-01T20:16:06.040",
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}


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