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

Vulnerability from cvelistv5 – Published: 2025-02-26 02:11 – Updated: 2025-05-04 08:36
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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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndriver core: Fix wait_for_device_probe() \u0026 deferred_probe_timeout interaction\n\nMounting NFS rootfs was timing out when deferred_probe_timeout was\nnon-zero [1].  This was because ip_auto_config() initcall times out\nwaiting for the network interfaces to show up when\ndeferred_probe_timeout was non-zero. 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/"
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/5ee76c256e928455212ab759c51d198fedbe7523"
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      ],
      "title": "driver core: Fix wait_for_device_probe() \u0026 deferred_probe_timeout interaction",
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    "dateReserved": "2025-02-26T02:08:31.558Z",
    "dateUpdated": "2025-05-04T08:36:25.934Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1"
}


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