CVE-2023-54211 (GCVE-0-2023-54211)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:11 – Updated: 2025-12-30 12:11
VLAI?
Title
tracing: Fix warning in trace_buffered_event_disable()
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix warning in trace_buffered_event_disable() Warning happened in trace_buffered_event_disable() at WARN_ON_ONCE(!trace_buffered_event_ref) Call Trace: ? __warn+0xa5/0x1b0 ? trace_buffered_event_disable+0x189/0x1b0 __ftrace_event_enable_disable+0x19e/0x3e0 free_probe_data+0x3b/0xa0 unregister_ftrace_function_probe_func+0x6b8/0x800 event_enable_func+0x2f0/0x3d0 ftrace_process_regex.isra.0+0x12d/0x1b0 ftrace_filter_write+0xe6/0x140 vfs_write+0x1c9/0x6f0 [...] The cause of the warning is in __ftrace_event_enable_disable(), trace_buffered_event_enable() was called once while trace_buffered_event_disable() was called twice. Reproduction script show as below, for analysis, see the comments: ``` #!/bin/bash cd /sys/kernel/tracing/ # 1. Register a 'disable_event' command, then: # 1) SOFT_DISABLED_BIT was set; # 2) trace_buffered_event_enable() was called first time; echo 'cmdline_proc_show:disable_event:initcall:initcall_finish' > \ set_ftrace_filter # 2. Enable the event registered, then: # 1) SOFT_DISABLED_BIT was cleared; # 2) trace_buffered_event_disable() was called first time; echo 1 > events/initcall/initcall_finish/enable # 3. Try to call into cmdline_proc_show(), then SOFT_DISABLED_BIT was # set again!!! cat /proc/cmdline # 4. Unregister the 'disable_event' command, then: # 1) SOFT_DISABLED_BIT was cleared again; # 2) trace_buffered_event_disable() was called second time!!! echo '!cmdline_proc_show:disable_event:initcall:initcall_finish' > \ set_ftrace_filter ``` To fix it, IIUC, we can change to call trace_buffered_event_enable() at fist time soft-mode enabled, and call trace_buffered_event_disable() at last time soft-mode disabled.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < 1488d782c9e43087a3f341b8186cd25f3cf75583 (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < b4f4ab423107dc1ba8e9cc6488c645be6403d3f5 (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < cdcc35e6454133feb61561b4e0d0c80e52cbc2ba (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < a6d2fd1703cdc8ecfc3e73987e0fb7474ae2b074 (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < 813cede7b2f5a4b1b75d2d4bb4e705cc8e063b20 (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < a3a3c7bddab9b6c5690b20796ef5e332b8c48afb (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < 528c9d73153754defb748f0b96ad33308668d817 (git)
Affected: 0fc1b09ff1ff404ddf753f5ffa5cd0adc8fdcdc9 , < dea499781a1150d285c62b26659f62fb00824fce (git)
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    Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 4.14.322 , ≤ 4.14.* (semver)
Unaffected: 4.19.291 , ≤ 4.19.* (semver)
Unaffected: 5.4.253 , ≤ 5.4.* (semver)
Unaffected: 5.10.190 , ≤ 5.10.* (semver)
Unaffected: 5.15.124 , ≤ 5.15.* (semver)
Unaffected: 6.1.43 , ≤ 6.1.* (semver)
Unaffected: 6.4.8 , ≤ 6.4.* (semver)
Unaffected: 6.5 , ≤ * (original_commit_for_fix)
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix warning in trace_buffered_event_disable()\n\nWarning happened in trace_buffered_event_disable() at\n  WARN_ON_ONCE(!trace_buffered_event_ref)\n\n  Call Trace:\n   ? __warn+0xa5/0x1b0\n   ? trace_buffered_event_disable+0x189/0x1b0\n   __ftrace_event_enable_disable+0x19e/0x3e0\n   free_probe_data+0x3b/0xa0\n   unregister_ftrace_function_probe_func+0x6b8/0x800\n   event_enable_func+0x2f0/0x3d0\n   ftrace_process_regex.isra.0+0x12d/0x1b0\n   ftrace_filter_write+0xe6/0x140\n   vfs_write+0x1c9/0x6f0\n   [...]\n\nThe cause of the warning is in __ftrace_event_enable_disable(),\ntrace_buffered_event_enable() was called once while\ntrace_buffered_event_disable() was called twice.\nReproduction script show as below, for analysis, see the comments:\n ```\n #!/bin/bash\n\n cd /sys/kernel/tracing/\n\n # 1. Register a \u0027disable_event\u0027 command, then:\n #    1) SOFT_DISABLED_BIT was set;\n #    2) trace_buffered_event_enable() was called first time;\n echo \u0027cmdline_proc_show:disable_event:initcall:initcall_finish\u0027 \u003e \\\n     set_ftrace_filter\n\n # 2. Enable the event registered, then:\n #    1) SOFT_DISABLED_BIT was cleared;\n #    2) trace_buffered_event_disable() was called first time;\n echo 1 \u003e events/initcall/initcall_finish/enable\n\n # 3. Try to call into cmdline_proc_show(), then SOFT_DISABLED_BIT was\n #    set again!!!\n cat /proc/cmdline\n\n # 4. Unregister the \u0027disable_event\u0027 command, then:\n #    1) SOFT_DISABLED_BIT was cleared again;\n #    2) trace_buffered_event_disable() was called second time!!!\n echo \u0027!cmdline_proc_show:disable_event:initcall:initcall_finish\u0027 \u003e \\\n     set_ftrace_filter\n ```\n\nTo fix it, IIUC, we can change to call trace_buffered_event_enable() at\nfist time soft-mode enabled, and call trace_buffered_event_disable() at\nlast time soft-mode disabled."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:11:09.356Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/813cede7b2f5a4b1b75d2d4bb4e705cc8e063b20"
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          "url": "https://git.kernel.org/stable/c/528c9d73153754defb748f0b96ad33308668d817"
        },
        {
          "url": "https://git.kernel.org/stable/c/dea499781a1150d285c62b26659f62fb00824fce"
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      ],
      "title": "tracing: Fix warning in trace_buffered_event_disable()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54211",
    "datePublished": "2025-12-30T12:11:09.356Z",
    "dateReserved": "2025-12-30T12:06:44.500Z",
    "dateUpdated": "2025-12-30T12:11:09.356Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54211\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:09.303\",\"lastModified\":\"2025-12-30T13:16:09.303\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntracing: Fix warning in trace_buffered_event_disable()\\n\\nWarning happened in trace_buffered_event_disable() at\\n  WARN_ON_ONCE(!trace_buffered_event_ref)\\n\\n  Call Trace:\\n   ? __warn+0xa5/0x1b0\\n   ? trace_buffered_event_disable+0x189/0x1b0\\n   __ftrace_event_enable_disable+0x19e/0x3e0\\n   free_probe_data+0x3b/0xa0\\n   unregister_ftrace_function_probe_func+0x6b8/0x800\\n   event_enable_func+0x2f0/0x3d0\\n   ftrace_process_regex.isra.0+0x12d/0x1b0\\n   ftrace_filter_write+0xe6/0x140\\n   vfs_write+0x1c9/0x6f0\\n   [...]\\n\\nThe cause of the warning is in __ftrace_event_enable_disable(),\\ntrace_buffered_event_enable() was called once while\\ntrace_buffered_event_disable() was called twice.\\nReproduction script show as below, for analysis, see the comments:\\n ```\\n #!/bin/bash\\n\\n cd /sys/kernel/tracing/\\n\\n # 1. Register a \u0027disable_event\u0027 command, then:\\n #    1) SOFT_DISABLED_BIT was set;\\n #    2) trace_buffered_event_enable() was called first time;\\n echo \u0027cmdline_proc_show:disable_event:initcall:initcall_finish\u0027 \u003e \\\\\\n     set_ftrace_filter\\n\\n # 2. Enable the event registered, then:\\n #    1) SOFT_DISABLED_BIT was cleared;\\n #    2) trace_buffered_event_disable() was called first time;\\n echo 1 \u003e events/initcall/initcall_finish/enable\\n\\n # 3. Try to call into cmdline_proc_show(), then SOFT_DISABLED_BIT was\\n #    set again!!!\\n cat /proc/cmdline\\n\\n # 4. Unregister the \u0027disable_event\u0027 command, then:\\n #    1) SOFT_DISABLED_BIT was cleared again;\\n #    2) trace_buffered_event_disable() was called second time!!!\\n echo \u0027!cmdline_proc_show:disable_event:initcall:initcall_finish\u0027 \u003e \\\\\\n     set_ftrace_filter\\n ```\\n\\nTo fix it, IIUC, we can change to call trace_buffered_event_enable() at\\nfist time soft-mode enabled, and call trace_buffered_event_disable() at\\nlast time soft-mode disabled.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1488d782c9e43087a3f341b8186cd25f3cf75583\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/528c9d73153754defb748f0b96ad33308668d817\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/813cede7b2f5a4b1b75d2d4bb4e705cc8e063b20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a3a3c7bddab9b6c5690b20796ef5e332b8c48afb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a6d2fd1703cdc8ecfc3e73987e0fb7474ae2b074\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b4f4ab423107dc1ba8e9cc6488c645be6403d3f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cdcc35e6454133feb61561b4e0d0c80e52cbc2ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dea499781a1150d285c62b26659f62fb00824fce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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