CVE-2022-49379 (GCVE-0-2022-49379)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:11 – Updated: 2026-05-11 18:58
VLAI?
Title
driver core: Fix wait_for_device_probe() & deferred_probe_timeout interaction
Summary
In the Linux kernel, the following vulnerability has been resolved: driver core: Fix wait_for_device_probe() & deferred_probe_timeout interaction Mounting NFS rootfs was timing out when deferred_probe_timeout was non-zero [1]. This was because ip_auto_config() initcall times out waiting for the network interfaces to show up when deferred_probe_timeout was non-zero. While ip_auto_config() calls wait_for_device_probe() to make sure any currently running deferred probe work or asynchronous probe finishes, that wasn't sufficient to account for devices being deferred until deferred_probe_timeout. Commit 35a672363ab3 ("driver core: Ensure wait_for_device_probe() waits until the deferred_probe_timeout fires") tried to fix that by making sure wait_for_device_probe() waits for deferred_probe_timeout to expire before returning. However, if wait_for_device_probe() is called from the kernel_init() context: - Before deferred_probe_initcall() [2], it causes the boot process to hang due to a deadlock. - After deferred_probe_initcall() [3], it blocks kernel_init() from continuing till deferred_probe_timeout expires and beats the point of deferred_probe_timeout that's trying to wait for userspace to load modules. Neither of this is good. So revert the changes to wait_for_device_probe(). [1] - https://lore.kernel.org/lkml/TYAPR01MB45443DF63B9EF29054F7C41FD8C60@TYAPR01MB4544.jpnprd01.prod.outlook.com/ [2] - https://lore.kernel.org/lkml/YowHNo4sBjr9ijZr@dev-arch.thelio-3990X/ [3] - https://lore.kernel.org/lkml/Yo3WvGnNk3LvLb7R@linutronix.de/
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 35a672363ab3e8dfe4ebcadb4dd0b2d06bb85ebe , < 71cbce75031aed26c72c2dc8a83111d181685f1b (git)
Affected: 35a672363ab3e8dfe4ebcadb4dd0b2d06bb85ebe , < 29357883a89193863f3cc6a2c5e0b42ceb022761 (git)
Affected: 35a672363ab3e8dfe4ebcadb4dd0b2d06bb85ebe , < 528229474e1cbb1b3451cb713d94aecb5f6ee264 (git)
Affected: 35a672363ab3e8dfe4ebcadb4dd0b2d06bb85ebe , < 4ad6af07efcca85369c21e4897b3020cff2c170b (git)
Affected: 35a672363ab3e8dfe4ebcadb4dd0b2d06bb85ebe , < 5ee76c256e928455212ab759c51d198fedbe7523 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.122 , ≤ 5.10.* (semver)
Unaffected: 5.15.47 , ≤ 5.15.* (semver)
Unaffected: 5.17.15 , ≤ 5.17.* (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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While ip_auto_config() calls\\nwait_for_device_probe() to make sure any currently running deferred\\nprobe work or asynchronous probe finishes, that wasn\u0027t sufficient to\\naccount for devices being deferred until deferred_probe_timeout.\\n\\nCommit 35a672363ab3 (\\\"driver core: Ensure wait_for_device_probe() waits\\nuntil the deferred_probe_timeout fires\\\") tried to fix that by making\\nsure wait_for_device_probe() waits for deferred_probe_timeout to expire\\nbefore returning.\\n\\nHowever, if wait_for_device_probe() is called from the kernel_init()\\ncontext:\\n\\n- Before deferred_probe_initcall() [2], it causes the boot process to\\n  hang due to a deadlock.\\n\\n- After deferred_probe_initcall() [3], it blocks kernel_init() from\\n  continuing till deferred_probe_timeout expires and beats the point of\\n  deferred_probe_timeout that\u0027s trying to wait for userspace to load\\n  modules.\\n\\nNeither of this is good. So revert the changes to\\nwait_for_device_probe().\\n\\n[1] - https://lore.kernel.org/lkml/TYAPR01MB45443DF63B9EF29054F7C41FD8C60@TYAPR01MB4544.jpnprd01.prod.outlook.com/\\n[2] - https://lore.kernel.org/lkml/YowHNo4sBjr9ijZr@dev-arch.thelio-3990X/\\n[3] - https://lore.kernel.org/lkml/Yo3WvGnNk3LvLb7R@linutronix.de/\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: n\u00facleo del controlador: se corrige la interacci\u00f3n wait_for_device_probe() y deferred_probe_timeout El montaje de rootfs NFS se agotaba cuando deferred_probe_timeout no era cero [1]. Esto se deb\u00eda a que la llamada de inicio ip_auto_config() agotaba el tiempo de espera a que aparecieran las interfaces de red cuando deferred_probe_timeout no era cero. Si bien ip_auto_config() llama a wait_for_device_probe() para asegurarse de que cualquier sonda diferida que se est\u00e9 ejecutando actualmente funcione o la sonda asincr\u00f3nica finalice, eso no era suficiente para explicar los dispositivos que se aplazaban hasta deferred_probe_timeout. El commit 35a672363ab3 (\\\"driver core: Ensure wait_for_device_probe() waits Until the deferred_probe_timeout fires\\\") intent\u00f3 solucionar eso asegur\u00e1ndose de que wait_for_device_probe() espere a que deferred_probe_timeout expire antes de regresar. Sin embargo, si wait_for_device_probe() se llama desde el contexto kernel_init(): - Antes de deferred_probe_initcall() [2], hace que el proceso de arranque se cuelgue debido a un punto muerto. - Despu\u00e9s de deferred_probe_initcall() [3], impide que kernel_init() contin\u00fae hasta que deferred_probe_timeout expire y supere el punto de deferred_probe_timeout que est\u00e1 tratando de esperar a que el espacio de usuario cargue m\u00f3dulos. Ninguna de estas opciones es buena. Por lo tanto, revierta los cambios a wait_for_device_probe(). 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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.