fkie_cve-2022-49313
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: usb: host: Fix deadlock in oxu_bus_suspend() There is a deadlock in oxu_bus_suspend(), which is shown below: (Thread 1) | (Thread 2) | timer_action() oxu_bus_suspend() | mod_timer() spin_lock_irq() //(1) | (wait a time) ... | oxu_watchdog() del_timer_sync() | spin_lock_irq() //(2) (wait timer to stop) | ... We hold oxu->lock in position (1) of thread 1, and use del_timer_sync() to wait timer to stop, but timer handler also need oxu->lock in position (2) of thread 2. As a result, oxu_bus_suspend() will block forever. This patch extracts del_timer_sync() from the protection of spin_lock_irq(), which could let timer handler to obtain the needed lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2dcec0bc142be2096af71a5703d63237127db204Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4187b291a76664a3c03d3f0d9bfadc8322881868Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d378f2ae58138d4c55684e1d274e7dd94aa6524Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9b58d255f27b0ed6a2e43208960864d67579db58Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a3d380188bde8900c3f604e82b56572896499124Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b97aae8b43b718314012e8170b7e03dbfd2e7677Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d888753872190abd18f68a7d77b9c7c367f0a7abPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8242044c91cafbba9e320b0fb31abf2429a3221Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ffe9440d698274c6462d2e304562c6ddfc8c84dfPatch
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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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: usb: host: Fix deadlock in oxu_bus_suspend()\n\nThere is a deadlock in oxu_bus_suspend(), which is shown below:\n\n   (Thread 1)              |      (Thread 2)\n                           | timer_action()\noxu_bus_suspend()          |  mod_timer()\n spin_lock_irq() //(1)     |  (wait a time)\n ...                       | oxu_watchdog()\n del_timer_sync()          |  spin_lock_irq() //(2)\n (wait timer to stop)      |  ...\n\nWe hold oxu-\u003elock in position (1) of thread 1, and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need oxu-\u003elock in position (2) of thread 2. As a result,\noxu_bus_suspend() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irq(), which could let timer handler to obtain\nthe needed lock."
    },
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drivers: usb: host: Corregir interbloqueo en oxu_bus_suspend() Hay un interbloqueo en oxu_bus_suspend(), que se muestra a continuaci\u00f3n: (Hilo 1) | (Hilo 2) | timer_action() oxu_bus_suspend() | mod_timer() spin_lock_irq() //(1) | (esperar un tiempo) ... | oxu_watchdog() del_timer_sync() | spin_lock_irq() //(2) (esperar a que el temporizador se detenga) | ... Mantenemos oxu-\u0026gt;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 oxu-\u0026gt;lock en la posici\u00f3n (2) del hilo 2. Como resultado, oxu_bus_suspend() se bloquear\u00e1 para siempre. Este parche extrae del_timer_sync() de la protecci\u00f3n de spin_lock_irq(), lo que podr\u00eda permitir que el controlador del temporizador obtenga el bloqueo necesario."
    }
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  "id": "CVE-2022-49313",
  "lastModified": "2025-10-01T20:16:05.347",
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