CVE-2022-50126 (GCVE-0-2022-50126)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2025-06-18 11:02
VLAI?
Title
jbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted
Summary
In the Linux kernel, the following vulnerability has been resolved: jbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted Following process will fail assertion 'jh->b_frozen_data == NULL' in jbd2_journal_dirty_metadata(): jbd2_journal_commit_transaction unlink(dir/a) jh->b_transaction = trans1 jh->b_jlist = BJ_Metadata journal->j_running_transaction = NULL trans1->t_state = T_COMMIT unlink(dir/b) handle->h_trans = trans2 do_get_write_access jh->b_modified = 0 jh->b_frozen_data = frozen_buffer jh->b_next_transaction = trans2 jbd2_journal_dirty_metadata is_handle_aborted is_journal_aborted // return false --> jbd2 abort <-- while (commit_transaction->t_buffers) if (is_journal_aborted) jbd2_journal_refile_buffer __jbd2_journal_refile_buffer WRITE_ONCE(jh->b_transaction, jh->b_next_transaction) WRITE_ONCE(jh->b_next_transaction, NULL) __jbd2_journal_file_buffer(jh, BJ_Reserved) J_ASSERT_JH(jh, jh->b_frozen_data == NULL) // assertion failure ! The reproducer (See detail in [Link]) reports: ------------[ cut here ]------------ kernel BUG at fs/jbd2/transaction.c:1629! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 2 PID: 584 Comm: unlink Tainted: G W 5.19.0-rc6-00115-g4a57a8400075-dirty #697 RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470 RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202 Call Trace: <TASK> __ext4_handle_dirty_metadata+0xa0/0x290 ext4_handle_dirty_dirblock+0x10c/0x1d0 ext4_delete_entry+0x104/0x200 __ext4_unlink+0x22b/0x360 ext4_unlink+0x275/0x390 vfs_unlink+0x20b/0x4c0 do_unlinkat+0x42f/0x4c0 __x64_sys_unlink+0x37/0x50 do_syscall_64+0x35/0x80 After journal aborting, __jbd2_journal_refile_buffer() is executed with holding @jh->b_state_lock, we can fix it by moving 'is_handle_aborted()' into the area protected by @jh->b_state_lock.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 470decc613ab2048b619a01028072d932d9086ee , < 0f61c6dc4b714be9d79cf0782ca02ba01c1b7ac3 (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < 6073389db83b903678a0920554fa19f5bdc51c48 (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < fa5b65d39332fef7a11ae99cb1f0696012a61527 (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < f7161d0da975adc234161cd0641d0e484f5ce375 (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < e62f79827784f56499a50ea2e893c98317b5407b (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < 731c1662d838fe954c6759e3ee43229b0d928fe4 (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < ddd896792e1718cb84c96f3e618270589b6886dc (git)
Affected: 470decc613ab2048b619a01028072d932d9086ee , < 4a734f0869f970b8a9b65062ea40b09a5da9dba8 (git)
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    Linux Linux Affected: 2.6.19
Unaffected: 0 , < 2.6.19 (semver)
Unaffected: 4.14.291 , ≤ 4.14.* (semver)
Unaffected: 4.19.256 , ≤ 4.19.* (semver)
Unaffected: 5.4.211 , ≤ 5.4.* (semver)
Unaffected: 5.10.137 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/jbd2/transaction.c"
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              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.291",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.256",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.211",
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.137",
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.61",
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              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.18",
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              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: fix assertion \u0027jh-\u003eb_frozen_data == NULL\u0027 failure when journal aborted\n\nFollowing process will fail assertion \u0027jh-\u003eb_frozen_data == NULL\u0027 in\njbd2_journal_dirty_metadata():\n\n                   jbd2_journal_commit_transaction\nunlink(dir/a)\n jh-\u003eb_transaction = trans1\n jh-\u003eb_jlist = BJ_Metadata\n                    journal-\u003ej_running_transaction = NULL\n                    trans1-\u003et_state = T_COMMIT\nunlink(dir/b)\n handle-\u003eh_trans = trans2\n do_get_write_access\n  jh-\u003eb_modified = 0\n  jh-\u003eb_frozen_data = frozen_buffer\n  jh-\u003eb_next_transaction = trans2\n jbd2_journal_dirty_metadata\n  is_handle_aborted\n   is_journal_aborted // return false\n\n           --\u003e jbd2 abort \u003c--\n\n                     while (commit_transaction-\u003et_buffers)\n                      if (is_journal_aborted)\n                       jbd2_journal_refile_buffer\n                        __jbd2_journal_refile_buffer\n                         WRITE_ONCE(jh-\u003eb_transaction,\n\t\t\t\t\t\tjh-\u003eb_next_transaction)\n                         WRITE_ONCE(jh-\u003eb_next_transaction, NULL)\n                         __jbd2_journal_file_buffer(jh, BJ_Reserved)\n        J_ASSERT_JH(jh, jh-\u003eb_frozen_data == NULL) // assertion failure !\n\nThe reproducer (See detail in [Link]) reports:\n ------------[ cut here ]------------\n kernel BUG at fs/jbd2/transaction.c:1629!\n invalid opcode: 0000 [#1] PREEMPT SMP\n CPU: 2 PID: 584 Comm: unlink Tainted: G        W\n 5.19.0-rc6-00115-g4a57a8400075-dirty #697\n RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470\n RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202\n Call Trace:\n  \u003cTASK\u003e\n  __ext4_handle_dirty_metadata+0xa0/0x290\n  ext4_handle_dirty_dirblock+0x10c/0x1d0\n  ext4_delete_entry+0x104/0x200\n  __ext4_unlink+0x22b/0x360\n  ext4_unlink+0x275/0x390\n  vfs_unlink+0x20b/0x4c0\n  do_unlinkat+0x42f/0x4c0\n  __x64_sys_unlink+0x37/0x50\n  do_syscall_64+0x35/0x80\n\nAfter journal aborting, __jbd2_journal_refile_buffer() is executed with\nholding @jh-\u003eb_state_lock, we can fix it by moving \u0027is_handle_aborted()\u0027\ninto the area protected by @jh-\u003eb_state_lock."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:02:53.672Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0f61c6dc4b714be9d79cf0782ca02ba01c1b7ac3"
        },
        {
          "url": "https://git.kernel.org/stable/c/6073389db83b903678a0920554fa19f5bdc51c48"
        },
        {
          "url": "https://git.kernel.org/stable/c/fa5b65d39332fef7a11ae99cb1f0696012a61527"
        },
        {
          "url": "https://git.kernel.org/stable/c/f7161d0da975adc234161cd0641d0e484f5ce375"
        },
        {
          "url": "https://git.kernel.org/stable/c/e62f79827784f56499a50ea2e893c98317b5407b"
        },
        {
          "url": "https://git.kernel.org/stable/c/731c1662d838fe954c6759e3ee43229b0d928fe4"
        },
        {
          "url": "https://git.kernel.org/stable/c/ddd896792e1718cb84c96f3e618270589b6886dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a734f0869f970b8a9b65062ea40b09a5da9dba8"
        }
      ],
      "title": "jbd2: fix assertion \u0027jh-\u003eb_frozen_data == NULL\u0027 failure when journal aborted",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50126",
    "datePublished": "2025-06-18T11:02:53.672Z",
    "dateReserved": "2025-06-18T10:57:27.417Z",
    "dateUpdated": "2025-06-18T11:02:53.672Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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  • 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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