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GHSA-PFPP-Q6GH-6XMM

Vulnerability from github – Published: 2024-07-12 15:31 – Updated: 2024-08-21 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()

bdev->bd_super has been removed and commit 8887b94d9322 change the usage from bdev->bd_super to b_assoc_map->host->i_sb. This introduces the following NULL pointer dereference in ocfs2_journal_dirty() since b_assoc_map is still not initialized. This can be easily reproduced by running xfstests generic/186, which simulate no more credits.

[ 134.351592] BUG: kernel NULL pointer dereference, address: 0000000000000000 ... [ 134.355341] RIP: 0010:ocfs2_journal_dirty+0x14f/0x160 [ocfs2] ... [ 134.365071] Call Trace: [ 134.365312] [ 134.365524] ? __die_body+0x1e/0x60 [ 134.365868] ? page_fault_oops+0x13d/0x4f0 [ 134.366265] ? __pfx_bit_wait_io+0x10/0x10 [ 134.366659] ? schedule+0x27/0xb0 [ 134.366981] ? exc_page_fault+0x6a/0x140 [ 134.367356] ? asm_exc_page_fault+0x26/0x30 [ 134.367762] ? ocfs2_journal_dirty+0x14f/0x160 [ocfs2] [ 134.368305] ? ocfs2_journal_dirty+0x13d/0x160 [ocfs2] [ 134.368837] ocfs2_create_new_meta_bhs.isra.51+0x139/0x2e0 [ocfs2] [ 134.369454] ocfs2_grow_tree+0x688/0x8a0 [ocfs2] [ 134.369927] ocfs2_split_and_insert.isra.67+0x35c/0x4a0 [ocfs2] [ 134.370521] ocfs2_split_extent+0x314/0x4d0 [ocfs2] [ 134.371019] ocfs2_change_extent_flag+0x174/0x410 [ocfs2] [ 134.371566] ocfs2_add_refcount_flag+0x3fa/0x630 [ocfs2] [ 134.372117] ocfs2_reflink_remap_extent+0x21b/0x4c0 [ocfs2] [ 134.372994] ? inode_update_timestamps+0x4a/0x120 [ 134.373692] ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2] [ 134.374545] ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2] [ 134.375393] ocfs2_reflink_remap_blocks+0xe4/0x4e0 [ocfs2] [ 134.376197] ocfs2_remap_file_range+0x1de/0x390 [ocfs2] [ 134.376971] ? security_file_permission+0x29/0x50 [ 134.377644] vfs_clone_file_range+0xfe/0x320 [ 134.378268] ioctl_file_clone+0x45/0xa0 [ 134.378853] do_vfs_ioctl+0x457/0x990 [ 134.379422] __x64_sys_ioctl+0x6e/0xd0 [ 134.379987] do_syscall_64+0x5d/0x170 [ 134.380550] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 134.381231] RIP: 0033:0x7fa4926397cb [ 134.381786] Code: 73 01 c3 48 8b 0d bd 56 38 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8d 56 38 00 f7 d8 64 89 01 48 [ 134.383930] RSP: 002b:00007ffc2b39f7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 134.384854] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa4926397cb [ 134.385734] RDX: 00007ffc2b39f7f0 RSI: 000000004020940d RDI: 0000000000000003 [ 134.386606] RBP: 0000000000000000 R08: 00111a82a4f015bb R09: 00007fa494221000 [ 134.387476] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 134.388342] R13: 0000000000f10000 R14: 0000558e844e2ac8 R15: 0000000000f10000 [ 134.389207]

Fix it by only aborting transaction and journal in ocfs2_journal_dirty() now, and leave ocfs2_abort() later when detecting an aborted handle, e.g. start next transaction. Also log the handle details in this case.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-40952"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:17Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()\n\nbdev-\u003ebd_super has been removed and commit 8887b94d9322 change the usage\nfrom bdev-\u003ebd_super to b_assoc_map-\u003ehost-\u003ei_sb.  This introduces the\nfollowing NULL pointer dereference in ocfs2_journal_dirty() since\nb_assoc_map is still not initialized.  This can be easily reproduced by\nrunning xfstests generic/186, which simulate no more credits.\n\n[  134.351592] BUG: kernel NULL pointer dereference, address: 0000000000000000\n...\n[  134.355341] RIP: 0010:ocfs2_journal_dirty+0x14f/0x160 [ocfs2]\n...\n[  134.365071] Call Trace:\n[  134.365312]  \u003cTASK\u003e\n[  134.365524]  ? __die_body+0x1e/0x60\n[  134.365868]  ? page_fault_oops+0x13d/0x4f0\n[  134.366265]  ? __pfx_bit_wait_io+0x10/0x10\n[  134.366659]  ? schedule+0x27/0xb0\n[  134.366981]  ? exc_page_fault+0x6a/0x140\n[  134.367356]  ? asm_exc_page_fault+0x26/0x30\n[  134.367762]  ? ocfs2_journal_dirty+0x14f/0x160 [ocfs2]\n[  134.368305]  ? ocfs2_journal_dirty+0x13d/0x160 [ocfs2]\n[  134.368837]  ocfs2_create_new_meta_bhs.isra.51+0x139/0x2e0 [ocfs2]\n[  134.369454]  ocfs2_grow_tree+0x688/0x8a0 [ocfs2]\n[  134.369927]  ocfs2_split_and_insert.isra.67+0x35c/0x4a0 [ocfs2]\n[  134.370521]  ocfs2_split_extent+0x314/0x4d0 [ocfs2]\n[  134.371019]  ocfs2_change_extent_flag+0x174/0x410 [ocfs2]\n[  134.371566]  ocfs2_add_refcount_flag+0x3fa/0x630 [ocfs2]\n[  134.372117]  ocfs2_reflink_remap_extent+0x21b/0x4c0 [ocfs2]\n[  134.372994]  ? inode_update_timestamps+0x4a/0x120\n[  134.373692]  ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2]\n[  134.374545]  ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2]\n[  134.375393]  ocfs2_reflink_remap_blocks+0xe4/0x4e0 [ocfs2]\n[  134.376197]  ocfs2_remap_file_range+0x1de/0x390 [ocfs2]\n[  134.376971]  ? security_file_permission+0x29/0x50\n[  134.377644]  vfs_clone_file_range+0xfe/0x320\n[  134.378268]  ioctl_file_clone+0x45/0xa0\n[  134.378853]  do_vfs_ioctl+0x457/0x990\n[  134.379422]  __x64_sys_ioctl+0x6e/0xd0\n[  134.379987]  do_syscall_64+0x5d/0x170\n[  134.380550]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[  134.381231] RIP: 0033:0x7fa4926397cb\n[  134.381786] Code: 73 01 c3 48 8b 0d bd 56 38 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8d 56 38 00 f7 d8 64 89 01 48\n[  134.383930] RSP: 002b:00007ffc2b39f7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n[  134.384854] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa4926397cb\n[  134.385734] RDX: 00007ffc2b39f7f0 RSI: 000000004020940d RDI: 0000000000000003\n[  134.386606] RBP: 0000000000000000 R08: 00111a82a4f015bb R09: 00007fa494221000\n[  134.387476] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n[  134.388342] R13: 0000000000f10000 R14: 0000558e844e2ac8 R15: 0000000000f10000\n[  134.389207]  \u003c/TASK\u003e\n\nFix it by only aborting transaction and journal in ocfs2_journal_dirty()\nnow, and leave ocfs2_abort() later when detecting an aborted handle,\ne.g. start next transaction. Also log the handle details in this case.",
  "id": "GHSA-pfpp-q6gh-6xmm",
  "modified": "2024-08-21T18:31:26Z",
  "published": "2024-07-12T15:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40952"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0550ad87711f815b3d73e487ec58ca7d8f56edbc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58f7e1e2c9e72c7974054c64c3abeac81c11f822"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72663d3e09091f431a0774227ca207c0358362dd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-40952 (GCVE-0-2024-40952)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:31 – Updated: 2026-05-11 20:23

Title

ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()

Summary

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty() bdev->bd_super has been removed and commit 8887b94d9322 change the usage from bdev->bd_super to b_assoc_map->host->i_sb. This introduces the following NULL pointer dereference in ocfs2_journal_dirty() since b_assoc_map is still not initialized. This can be easily reproduced by running xfstests generic/186, which simulate no more credits. [ 134.351592] BUG: kernel NULL pointer dereference, address: 0000000000000000 ... [ 134.355341] RIP: 0010:ocfs2_journal_dirty+0x14f/0x160 [ocfs2] ... [ 134.365071] Call Trace: [ 134.365312] <TASK> [ 134.365524] ? __die_body+0x1e/0x60 [ 134.365868] ? page_fault_oops+0x13d/0x4f0 [ 134.366265] ? __pfx_bit_wait_io+0x10/0x10 [ 134.366659] ? schedule+0x27/0xb0 [ 134.366981] ? exc_page_fault+0x6a/0x140 [ 134.367356] ? asm_exc_page_fault+0x26/0x30 [ 134.367762] ? ocfs2_journal_dirty+0x14f/0x160 [ocfs2] [ 134.368305] ? ocfs2_journal_dirty+0x13d/0x160 [ocfs2] [ 134.368837] ocfs2_create_new_meta_bhs.isra.51+0x139/0x2e0 [ocfs2] [ 134.369454] ocfs2_grow_tree+0x688/0x8a0 [ocfs2] [ 134.369927] ocfs2_split_and_insert.isra.67+0x35c/0x4a0 [ocfs2] [ 134.370521] ocfs2_split_extent+0x314/0x4d0 [ocfs2] [ 134.371019] ocfs2_change_extent_flag+0x174/0x410 [ocfs2] [ 134.371566] ocfs2_add_refcount_flag+0x3fa/0x630 [ocfs2] [ 134.372117] ocfs2_reflink_remap_extent+0x21b/0x4c0 [ocfs2] [ 134.372994] ? inode_update_timestamps+0x4a/0x120 [ 134.373692] ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2] [ 134.374545] ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2] [ 134.375393] ocfs2_reflink_remap_blocks+0xe4/0x4e0 [ocfs2] [ 134.376197] ocfs2_remap_file_range+0x1de/0x390 [ocfs2] [ 134.376971] ? security_file_permission+0x29/0x50 [ 134.377644] vfs_clone_file_range+0xfe/0x320 [ 134.378268] ioctl_file_clone+0x45/0xa0 [ 134.378853] do_vfs_ioctl+0x457/0x990 [ 134.379422] __x64_sys_ioctl+0x6e/0xd0 [ 134.379987] do_syscall_64+0x5d/0x170 [ 134.380550] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 134.381231] RIP: 0033:0x7fa4926397cb [ 134.381786] Code: 73 01 c3 48 8b 0d bd 56 38 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8d 56 38 00 f7 d8 64 89 01 48 [ 134.383930] RSP: 002b:00007ffc2b39f7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 134.384854] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa4926397cb [ 134.385734] RDX: 00007ffc2b39f7f0 RSI: 000000004020940d RDI: 0000000000000003 [ 134.386606] RBP: 0000000000000000 R08: 00111a82a4f015bb R09: 00007fa494221000 [ 134.387476] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 134.388342] R13: 0000000000f10000 R14: 0000558e844e2ac8 R15: 0000000000f10000 [ 134.389207] </TASK> Fix it by only aborting transaction and journal in ocfs2_journal_dirty() now, and leave ocfs2_abort() later when detecting an aborted handle, e.g. start next transaction. Also log the handle details in this case.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 17:03 UTC

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/0550ad87711f815b3…
https://git.kernel.org/stable/c/72663d3e09091f431…
https://git.kernel.org/stable/c/58f7e1e2c9e72c797…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8887b94d93224e0ef7e1bc6369640e313b8b12f4 , < 0550ad87711f815b3d73e487ec58ca7d8f56edbc (git) Affected: 8887b94d93224e0ef7e1bc6369640e313b8b12f4 , < 72663d3e09091f431a0774227ca207c0358362dd (git) Affected: 8887b94d93224e0ef7e1bc6369640e313b8b12f4 , < 58f7e1e2c9e72c7974054c64c3abeac81c11f822 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.36 , ≤ 6.6.* (semver) Unaffected: 6.9.7 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix)

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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()\n\nbdev-\u003ebd_super has been removed and commit 8887b94d9322 change the usage\nfrom bdev-\u003ebd_super to b_assoc_map-\u003ehost-\u003ei_sb.  This introduces the\nfollowing NULL pointer dereference in ocfs2_journal_dirty() since\nb_assoc_map is still not initialized.  This can be easily reproduced by\nrunning xfstests generic/186, which simulate no more credits.\n\n[  134.351592] BUG: kernel NULL pointer dereference, address: 0000000000000000\n...\n[  134.355341] RIP: 0010:ocfs2_journal_dirty+0x14f/0x160 [ocfs2]\n...\n[  134.365071] Call Trace:\n[  134.365312]  \u003cTASK\u003e\n[  134.365524]  ? __die_body+0x1e/0x60\n[  134.365868]  ? page_fault_oops+0x13d/0x4f0\n[  134.366265]  ? __pfx_bit_wait_io+0x10/0x10\n[  134.366659]  ? schedule+0x27/0xb0\n[  134.366981]  ? exc_page_fault+0x6a/0x140\n[  134.367356]  ? asm_exc_page_fault+0x26/0x30\n[  134.367762]  ? ocfs2_journal_dirty+0x14f/0x160 [ocfs2]\n[  134.368305]  ? ocfs2_journal_dirty+0x13d/0x160 [ocfs2]\n[  134.368837]  ocfs2_create_new_meta_bhs.isra.51+0x139/0x2e0 [ocfs2]\n[  134.369454]  ocfs2_grow_tree+0x688/0x8a0 [ocfs2]\n[  134.369927]  ocfs2_split_and_insert.isra.67+0x35c/0x4a0 [ocfs2]\n[  134.370521]  ocfs2_split_extent+0x314/0x4d0 [ocfs2]\n[  134.371019]  ocfs2_change_extent_flag+0x174/0x410 [ocfs2]\n[  134.371566]  ocfs2_add_refcount_flag+0x3fa/0x630 [ocfs2]\n[  134.372117]  ocfs2_reflink_remap_extent+0x21b/0x4c0 [ocfs2]\n[  134.372994]  ? inode_update_timestamps+0x4a/0x120\n[  134.373692]  ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2]\n[  134.374545]  ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2]\n[  134.375393]  ocfs2_reflink_remap_blocks+0xe4/0x4e0 [ocfs2]\n[  134.376197]  ocfs2_remap_file_range+0x1de/0x390 [ocfs2]\n[  134.376971]  ? security_file_permission+0x29/0x50\n[  134.377644]  vfs_clone_file_range+0xfe/0x320\n[  134.378268]  ioctl_file_clone+0x45/0xa0\n[  134.378853]  do_vfs_ioctl+0x457/0x990\n[  134.379422]  __x64_sys_ioctl+0x6e/0xd0\n[  134.379987]  do_syscall_64+0x5d/0x170\n[  134.380550]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[  134.381231] RIP: 0033:0x7fa4926397cb\n[  134.381786] Code: 73 01 c3 48 8b 0d bd 56 38 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8d 56 38 00 f7 d8 64 89 01 48\n[  134.383930] RSP: 002b:00007ffc2b39f7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n[  134.384854] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa4926397cb\n[  134.385734] RDX: 00007ffc2b39f7f0 RSI: 000000004020940d RDI: 0000000000000003\n[  134.386606] RBP: 0000000000000000 R08: 00111a82a4f015bb R09: 00007fa494221000\n[  134.387476] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n[  134.388342] R13: 0000000000f10000 R14: 0000558e844e2ac8 R15: 0000000000f10000\n[  134.389207]  \u003c/TASK\u003e\n\nFix it by only aborting transaction and journal in ocfs2_journal_dirty()\nnow, and leave ocfs2_abort() later when detecting an aborted handle,\ne.g. start next transaction. Also log the handle details in this case."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:23:00.265Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0550ad87711f815b3d73e487ec58ca7d8f56edbc"
        },
        {
          "url": "https://git.kernel.org/stable/c/72663d3e09091f431a0774227ca207c0358362dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/58f7e1e2c9e72c7974054c64c3abeac81c11f822"
        }
      ],
      "title": "ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-40952",
    "datePublished": "2024-07-12T12:31:56.160Z",
    "dateReserved": "2024-07-12T12:17:45.592Z",
    "dateUpdated": "2026-05-11T20:23:00.265Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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

Detection rules are retrieved from Rulezet.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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