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

Vulnerability from cvelistv5 – Published: 2024-07-12 12:31 – Updated: 2025-05-04 09:18
VLAI?
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.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8887b94d93224e0ef7e1bc6369640e313b8b12f4 , < 0550ad87711f815b3d73e487ec58ca7d8f56edbc (git)
Affected: 8887b94d93224e0ef7e1bc6369640e313b8b12f4 , < 72663d3e09091f431a0774227ca207c0358362dd (git)
Affected: 8887b94d93224e0ef7e1bc6369640e313b8b12f4 , < 58f7e1e2c9e72c7974054c64c3abeac81c11f822 (git)
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    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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          "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."
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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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.36\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.7\", \"versionStartIncluding\": \"6.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"6.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:18:39.596Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40952\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:18:39.596Z\", \"dateReserved\": \"2024-07-12T12:17:45.592Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:31:56.160Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Detection rules are retrieved from Rulezet.