CVE-2023-53339 (GCVE-0-2023-53339)
Vulnerability from cvelistv5
Published
2025-09-17 14:56
Modified
2025-09-17 14:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix BUG_ON condition in btrfs_cancel_balance Pausing and canceling balance can race to interrupt balance lead to BUG_ON panic in btrfs_cancel_balance. The BUG_ON condition in btrfs_cancel_balance does not take this race scenario into account. However, the race condition has no other side effects. We can fix that. Reproducing it with panic trace like this: kernel BUG at fs/btrfs/volumes.c:4618! RIP: 0010:btrfs_cancel_balance+0x5cf/0x6a0 Call Trace: <TASK> ? do_nanosleep+0x60/0x120 ? hrtimer_nanosleep+0xb7/0x1a0 ? sched_core_clone_cookie+0x70/0x70 btrfs_ioctl_balance_ctl+0x55/0x70 btrfs_ioctl+0xa46/0xd20 __x64_sys_ioctl+0x7d/0xa0 do_syscall_64+0x38/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Race scenario as follows: > mutex_unlock(&fs_info->balance_mutex); > -------------------- > .......issue pause and cancel req in another thread > -------------------- > ret = __btrfs_balance(fs_info); > > mutex_lock(&fs_info->balance_mutex); > if (ret == -ECANCELED && atomic_read(&fs_info->balance_pause_req)) { > btrfs_info(fs_info, "balance: paused"); > btrfs_exclop_balance(fs_info, BTRFS_EXCLOP_BALANCE_PAUSED); > }
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/volumes.c"
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.5",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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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\nbtrfs: fix BUG_ON condition in btrfs_cancel_balance\n\nPausing and canceling balance can race to interrupt balance lead to BUG_ON\npanic in btrfs_cancel_balance. The BUG_ON condition in btrfs_cancel_balance\ndoes not take this race scenario into account.\n\nHowever, the race condition has no other side effects. We can fix that.\n\nReproducing it with panic trace like this:\n\n  kernel BUG at fs/btrfs/volumes.c:4618!\n  RIP: 0010:btrfs_cancel_balance+0x5cf/0x6a0\n  Call Trace:\n   \u003cTASK\u003e\n   ? do_nanosleep+0x60/0x120\n   ? hrtimer_nanosleep+0xb7/0x1a0\n   ? sched_core_clone_cookie+0x70/0x70\n   btrfs_ioctl_balance_ctl+0x55/0x70\n   btrfs_ioctl+0xa46/0xd20\n   __x64_sys_ioctl+0x7d/0xa0\n   do_syscall_64+0x38/0x80\n   entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n  Race scenario as follows:\n  \u003e mutex_unlock(\u0026fs_info-\u003ebalance_mutex);\n  \u003e --------------------\n  \u003e .......issue pause and cancel req in another thread\n  \u003e --------------------\n  \u003e ret = __btrfs_balance(fs_info);\n  \u003e\n  \u003e mutex_lock(\u0026fs_info-\u003ebalance_mutex);\n  \u003e if (ret == -ECANCELED \u0026\u0026 atomic_read(\u0026fs_info-\u003ebalance_pause_req)) {\n  \u003e         btrfs_info(fs_info, \"balance: paused\");\n  \u003e         btrfs_exclop_balance(fs_info, BTRFS_EXCLOP_BALANCE_PAUSED);\n  \u003e }"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-17T14:56:33.114Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7c93b89cd46636b5e74c12fa21dd86167bc6ea8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a0a462a0f20926918d6009f0b4b25673e883fc98"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd7bef82ce0e929ef4cf63a34990545aaca28077"
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        {
          "url": "https://git.kernel.org/stable/c/b966e9e1e250dfdb41a7f41775faea4a37af923c"
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          "url": "https://git.kernel.org/stable/c/ceb9ba8e30833a4823e2dc73f80ebcdf2498d01a"
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        {
          "url": "https://git.kernel.org/stable/c/ae81329f7de3aa6f34ecdfa5412e72161a30e9ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/29eefa6d0d07e185f7bfe9576f91e6dba98189c2"
        }
      ],
      "title": "btrfs: fix BUG_ON condition in btrfs_cancel_balance",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53339",
    "datePublished": "2025-09-17T14:56:33.114Z",
    "dateReserved": "2025-09-16T16:08:59.565Z",
    "dateUpdated": "2025-09-17T14:56:33.114Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53339\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-17T15:15:37.030\",\"lastModified\":\"2025-09-18T13:43:34.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: fix BUG_ON condition in btrfs_cancel_balance\\n\\nPausing and canceling balance can race to interrupt balance lead to BUG_ON\\npanic in btrfs_cancel_balance. The BUG_ON condition in btrfs_cancel_balance\\ndoes not take this race scenario into account.\\n\\nHowever, the race condition has no other side effects. We can fix that.\\n\\nReproducing it with panic trace like this:\\n\\n  kernel BUG at fs/btrfs/volumes.c:4618!\\n  RIP: 0010:btrfs_cancel_balance+0x5cf/0x6a0\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? do_nanosleep+0x60/0x120\\n   ? hrtimer_nanosleep+0xb7/0x1a0\\n   ? sched_core_clone_cookie+0x70/0x70\\n   btrfs_ioctl_balance_ctl+0x55/0x70\\n   btrfs_ioctl+0xa46/0xd20\\n   __x64_sys_ioctl+0x7d/0xa0\\n   do_syscall_64+0x38/0x80\\n   entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\n  Race scenario as follows:\\n  \u003e mutex_unlock(\u0026fs_info-\u003ebalance_mutex);\\n  \u003e --------------------\\n  \u003e .......issue pause and cancel req in another thread\\n  \u003e --------------------\\n  \u003e ret = __btrfs_balance(fs_info);\\n  \u003e\\n  \u003e mutex_lock(\u0026fs_info-\u003ebalance_mutex);\\n  \u003e if (ret == -ECANCELED \u0026\u0026 atomic_read(\u0026fs_info-\u003ebalance_pause_req)) {\\n  \u003e         btrfs_info(fs_info, \\\"balance: paused\\\");\\n  \u003e         btrfs_exclop_balance(fs_info, BTRFS_EXCLOP_BALANCE_PAUSED);\\n  \u003e }\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/29eefa6d0d07e185f7bfe9576f91e6dba98189c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c93b89cd46636b5e74c12fa21dd86167bc6ea8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a0a462a0f20926918d6009f0b4b25673e883fc98\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae81329f7de3aa6f34ecdfa5412e72161a30e9ce\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b966e9e1e250dfdb41a7f41775faea4a37af923c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd7bef82ce0e929ef4cf63a34990545aaca28077\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ceb9ba8e30833a4823e2dc73f80ebcdf2498d01a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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