CVE-2025-39829 (GCVE-0-2025-39829)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-09-29 06:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: trace/fgraph: Fix the warning caused by missing unregister notifier This warning was triggered during testing on v6.16: notifier callback ftrace_suspend_notifier_call already registered WARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0 ... Call Trace: <TASK> blocking_notifier_chain_register+0x34/0x60 register_ftrace_graph+0x330/0x410 ftrace_profile_write+0x1e9/0x340 vfs_write+0xf8/0x420 ? filp_flush+0x8a/0xa0 ? filp_close+0x1f/0x30 ? do_dup2+0xaf/0x160 ksys_write+0x65/0xe0 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x77/0x7f When writing to the function_profile_enabled interface, the notifier was not unregistered after start_graph_tracing failed, causing a warning the next time function_profile_enabled was written. Fixed by adding unregister_pm_notifier in the exception path.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4a2b8dda3f8705880ec7408135645602d5590f51
Version: 4a2b8dda3f8705880ec7408135645602d5590f51
Version: 4a2b8dda3f8705880ec7408135645602d5590f51
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/fgraph.c"
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          "vendor": "Linux",
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          "vendor": "Linux",
          "versions": [
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              "version": "2.6.30"
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              "version": "0",
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              "versionType": "semver"
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntrace/fgraph: Fix the warning caused by missing unregister notifier\n\nThis warning was triggered during testing on v6.16:\n\nnotifier callback ftrace_suspend_notifier_call already registered\nWARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0\n...\nCall Trace:\n \u003cTASK\u003e\n blocking_notifier_chain_register+0x34/0x60\n register_ftrace_graph+0x330/0x410\n ftrace_profile_write+0x1e9/0x340\n vfs_write+0xf8/0x420\n ? filp_flush+0x8a/0xa0\n ? filp_close+0x1f/0x30\n ? do_dup2+0xaf/0x160\n ksys_write+0x65/0xe0\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nWhen writing to the function_profile_enabled interface, the notifier was\nnot unregistered after start_graph_tracing failed, causing a warning the\nnext time function_profile_enabled was written.\n\nFixed by adding unregister_pm_notifier in the exception path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T06:00:31.815Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b"
        },
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          "url": "https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe"
        },
        {
          "url": "https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2"
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      ],
      "title": "trace/fgraph: Fix the warning caused by missing unregister notifier",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39829",
    "datePublished": "2025-09-16T13:00:27.154Z",
    "dateReserved": "2025-04-16T07:20:57.140Z",
    "dateUpdated": "2025-09-29T06:00:31.815Z",
    "state": "PUBLISHED"
  },
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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39829\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T13:16:03.887\",\"lastModified\":\"2025-09-17T14:18:55.093\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntrace/fgraph: Fix the warning caused by missing unregister notifier\\n\\nThis warning was triggered during testing on v6.16:\\n\\nnotifier callback ftrace_suspend_notifier_call already registered\\nWARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0\\n...\\nCall Trace:\\n \u003cTASK\u003e\\n blocking_notifier_chain_register+0x34/0x60\\n register_ftrace_graph+0x330/0x410\\n ftrace_profile_write+0x1e9/0x340\\n vfs_write+0xf8/0x420\\n ? filp_flush+0x8a/0xa0\\n ? filp_close+0x1f/0x30\\n ? do_dup2+0xaf/0x160\\n ksys_write+0x65/0xe0\\n do_syscall_64+0xa4/0x260\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nWhen writing to the function_profile_enabled interface, the notifier was\\nnot unregistered after start_graph_tracing failed, causing a warning the\\nnext time function_profile_enabled was written.\\n\\nFixed by adding unregister_pm_notifier in the exception path.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/000aa47a51233fd38a629b029478e0278e1e9fbe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2a2deb9f8df70480050351ac27041f19bb9e718b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/edede7a6dcd7435395cf757d053974aaab6ab1c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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