CVE-2023-54316 (GCVE-0-2023-54316)
Vulnerability from cvelistv5
Published
2025-12-30 12:23
Modified
2025-12-30 12:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: refscale: Fix uninitalized use of wait_queue_head_t Running the refscale test occasionally crashes the kernel with the following error: [ 8569.952896] BUG: unable to handle page fault for address: ffffffffffffffe8 [ 8569.952900] #PF: supervisor read access in kernel mode [ 8569.952902] #PF: error_code(0x0000) - not-present page [ 8569.952904] PGD c4b048067 P4D c4b049067 PUD c4b04b067 PMD 0 [ 8569.952910] Oops: 0000 [#1] PREEMPT_RT SMP NOPTI [ 8569.952916] Hardware name: Dell Inc. PowerEdge R750/0WMWCR, BIOS 1.2.4 05/28/2021 [ 8569.952917] RIP: 0010:prepare_to_wait_event+0x101/0x190 : [ 8569.952940] Call Trace: [ 8569.952941] <TASK> [ 8569.952944] ref_scale_reader+0x380/0x4a0 [refscale] [ 8569.952959] kthread+0x10e/0x130 [ 8569.952966] ret_from_fork+0x1f/0x30 [ 8569.952973] </TASK> The likely cause is that init_waitqueue_head() is called after the call to the torture_create_kthread() function that creates the ref_scale_reader kthread. Although this init_waitqueue_head() call will very likely complete before this kthread is created and starts running, it is possible that the calling kthread will be delayed between the calls to torture_create_kthread() and init_waitqueue_head(). In this case, the new kthread will use the waitqueue head before it is properly initialized, which is not good for the kernel's health and well-being. The above crash happened here: static inline void __add_wait_queue(...) { : if (!(wq->flags & WQ_FLAG_PRIORITY)) <=== Crash here The offset of flags from list_head entry in wait_queue_entry is -0x18. If reader_tasks[i].wq.head.next is NULL as allocated reader_task structure is zero initialized, the instruction will try to access address 0xffffffffffffffe8, which is exactly the fault address listed above. This commit therefore invokes init_waitqueue_head() before creating the kthread.
References
Impacted products
Vendor Product Version
Linux Linux Version: 653ed64b01dc5989f8f579d0038e987476c2c023
Version: 653ed64b01dc5989f8f579d0038e987476c2c023
Version: 653ed64b01dc5989f8f579d0038e987476c2c023
Version: 653ed64b01dc5989f8f579d0038e987476c2c023
Version: 653ed64b01dc5989f8f579d0038e987476c2c023
Version: 653ed64b01dc5989f8f579d0038e987476c2c023
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/rcu/refscale.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "vendor": "Linux",
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              "version": "0",
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              "version": "6.1.53",
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              "version": "6.4.16",
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              "version": "6.5.3",
              "versionType": "semver"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.195",
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrefscale: Fix uninitalized use of wait_queue_head_t\n\nRunning the refscale test occasionally crashes the kernel with the\nfollowing error:\n\n[ 8569.952896] BUG: unable to handle page fault for address: ffffffffffffffe8\n[ 8569.952900] #PF: supervisor read access in kernel mode\n[ 8569.952902] #PF: error_code(0x0000) - not-present page\n[ 8569.952904] PGD c4b048067 P4D c4b049067 PUD c4b04b067 PMD 0\n[ 8569.952910] Oops: 0000 [#1] PREEMPT_RT SMP NOPTI\n[ 8569.952916] Hardware name: Dell Inc. PowerEdge R750/0WMWCR, BIOS 1.2.4 05/28/2021\n[ 8569.952917] RIP: 0010:prepare_to_wait_event+0x101/0x190\n  :\n[ 8569.952940] Call Trace:\n[ 8569.952941]  \u003cTASK\u003e\n[ 8569.952944]  ref_scale_reader+0x380/0x4a0 [refscale]\n[ 8569.952959]  kthread+0x10e/0x130\n[ 8569.952966]  ret_from_fork+0x1f/0x30\n[ 8569.952973]  \u003c/TASK\u003e\n\nThe likely cause is that init_waitqueue_head() is called after the call to\nthe torture_create_kthread() function that creates the ref_scale_reader\nkthread.  Although this init_waitqueue_head() call will very likely\ncomplete before this kthread is created and starts running, it is\npossible that the calling kthread will be delayed between the calls to\ntorture_create_kthread() and init_waitqueue_head().  In this case, the\nnew kthread will use the waitqueue head before it is properly initialized,\nwhich is not good for the kernel\u0027s health and well-being.\n\nThe above crash happened here:\n\n\tstatic inline void __add_wait_queue(...)\n\t{\n\t\t:\n\t\tif (!(wq-\u003eflags \u0026 WQ_FLAG_PRIORITY)) \u003c=== Crash here\n\nThe offset of flags from list_head entry in wait_queue_entry is\n-0x18. If reader_tasks[i].wq.head.next is NULL as allocated reader_task\nstructure is zero initialized, the instruction will try to access address\n0xffffffffffffffe8, which is exactly the fault address listed above.\n\nThis commit therefore invokes init_waitqueue_head() before creating\nthe kthread."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:23:46.526Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/066fbd8bc981cf49923bf828b7b4092894df577f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec9d118ad99dc6f1bc674c1e649c25533d89b9ba"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0322a255a2242dbe4686b6176b3c83dea490529"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5de968a9032366198720eac4f368ed7e690b3ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/70a2856fd1d0a040c876ba9e3f89b949ae92e4dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/f5063e8948dad7f31adb007284a5d5038ae31bb8"
        }
      ],
      "title": "refscale: Fix uninitalized use of wait_queue_head_t",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54316",
    "datePublished": "2025-12-30T12:23:46.526Z",
    "dateReserved": "2025-12-30T12:06:44.531Z",
    "dateUpdated": "2025-12-30T12:23:46.526Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54316\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:16:20.867\",\"lastModified\":\"2025-12-30T13:16:20.867\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nrefscale: Fix uninitalized use of wait_queue_head_t\\n\\nRunning the refscale test occasionally crashes the kernel with the\\nfollowing error:\\n\\n[ 8569.952896] BUG: unable to handle page fault for address: ffffffffffffffe8\\n[ 8569.952900] #PF: supervisor read access in kernel mode\\n[ 8569.952902] #PF: error_code(0x0000) - not-present page\\n[ 8569.952904] PGD c4b048067 P4D c4b049067 PUD c4b04b067 PMD 0\\n[ 8569.952910] Oops: 0000 [#1] PREEMPT_RT SMP NOPTI\\n[ 8569.952916] Hardware name: Dell Inc. PowerEdge R750/0WMWCR, BIOS 1.2.4 05/28/2021\\n[ 8569.952917] RIP: 0010:prepare_to_wait_event+0x101/0x190\\n  :\\n[ 8569.952940] Call Trace:\\n[ 8569.952941]  \u003cTASK\u003e\\n[ 8569.952944]  ref_scale_reader+0x380/0x4a0 [refscale]\\n[ 8569.952959]  kthread+0x10e/0x130\\n[ 8569.952966]  ret_from_fork+0x1f/0x30\\n[ 8569.952973]  \u003c/TASK\u003e\\n\\nThe likely cause is that init_waitqueue_head() is called after the call to\\nthe torture_create_kthread() function that creates the ref_scale_reader\\nkthread.  Although this init_waitqueue_head() call will very likely\\ncomplete before this kthread is created and starts running, it is\\npossible that the calling kthread will be delayed between the calls to\\ntorture_create_kthread() and init_waitqueue_head().  In this case, the\\nnew kthread will use the waitqueue head before it is properly initialized,\\nwhich is not good for the kernel\u0027s health and well-being.\\n\\nThe above crash happened here:\\n\\n\\tstatic inline void __add_wait_queue(...)\\n\\t{\\n\\t\\t:\\n\\t\\tif (!(wq-\u003eflags \u0026 WQ_FLAG_PRIORITY)) \u003c=== Crash here\\n\\nThe offset of flags from list_head entry in wait_queue_entry is\\n-0x18. If reader_tasks[i].wq.head.next is NULL as allocated reader_task\\nstructure is zero initialized, the instruction will try to access address\\n0xffffffffffffffe8, which is exactly the fault address listed above.\\n\\nThis commit therefore invokes init_waitqueue_head() before creating\\nthe kthread.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/066fbd8bc981cf49923bf828b7b4092894df577f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/70a2856fd1d0a040c876ba9e3f89b949ae92e4dd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0322a255a2242dbe4686b6176b3c83dea490529\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e5de968a9032366198720eac4f368ed7e690b3ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec9d118ad99dc6f1bc674c1e649c25533d89b9ba\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f5063e8948dad7f31adb007284a5d5038ae31bb8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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