CVE-2021-47145 (GCVE-0-2021-47145)

Vulnerability from cvelistv5 – Published: 2024-03-25 09:07 – Updated: 2025-12-18 11:35
VLAI?
Title
btrfs: do not BUG_ON in link_to_fixup_dir
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: do not BUG_ON in link_to_fixup_dir While doing error injection testing I got the following panic kernel BUG at fs/btrfs/tree-log.c:1862! invalid opcode: 0000 [#1] SMP NOPTI CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014 RIP: 0010:link_to_fixup_dir+0xd5/0xe0 RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216 RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0 RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000 RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001 R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800 R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065 FS: 00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0 Call Trace: replay_one_buffer+0x409/0x470 ? btree_read_extent_buffer_pages+0xd0/0x110 walk_up_log_tree+0x157/0x1e0 walk_log_tree+0xa6/0x1d0 btrfs_recover_log_trees+0x1da/0x360 ? replay_one_extent+0x7b0/0x7b0 open_ctree+0x1486/0x1720 btrfs_mount_root.cold+0x12/0xea ? __kmalloc_track_caller+0x12f/0x240 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 vfs_kern_mount.part.0+0x71/0xb0 btrfs_mount+0x10d/0x380 ? vfs_parse_fs_string+0x4d/0x90 legacy_get_tree+0x24/0x40 vfs_get_tree+0x22/0xb0 path_mount+0x433/0xa10 __x64_sys_mount+0xe3/0x120 do_syscall_64+0x3d/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae We can get -EIO or any number of legitimate errors from btrfs_search_slot(), panicing here is not the appropriate response. The error path for this code handles errors properly, simply return the error.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < 76bfd8ac20bebeae599452a03dfc5724c0475dcf (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < e934c4ee17b33bafb0444f2f9766cda7166d3c40 (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < 0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < 6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < 0ed102453aa1cd12fefde8f6b60b9519b0b1f003 (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < 7e13db503918820e6333811cdc6f151dcea5090a (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < b545442133580dcb2f2496133bf850824d41255c (git)
Affected: e02119d5a7b4396c5a872582fddc8bd6d305a70a , < 91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 4.4.271 , ≤ 4.4.* (semver)
Unaffected: 4.9.271 , ≤ 4.9.* (semver)
Unaffected: 4.14.235 , ≤ 4.14.* (semver)
Unaffected: 4.19.193 , ≤ 4.19.* (semver)
Unaffected: 5.4.124 , ≤ 5.4.* (semver)
Unaffected: 5.10.42 , ≤ 5.10.* (semver)
Unaffected: 5.12.9 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)
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\"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e02119d5a7b4396c5a872582fddc8bd6d305a70a\", \"lessThan\": \"b545442133580dcb2f2496133bf850824d41255c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e02119d5a7b4396c5a872582fddc8bd6d305a70a\", \"lessThan\": \"91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/btrfs/tree-log.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.29\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.29\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.193\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.124\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.42\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/btrfs/tree-log.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf\"}, {\"url\": \"https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40\"}, {\"url\": \"https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611\"}, {\"url\": \"https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa\"}, {\"url\": \"https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003\"}, {\"url\": \"https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a\"}, {\"url\": \"https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c\"}, {\"url\": \"https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: do not BUG_ON in link_to_fixup_dir\\n\\nWhile doing error injection testing I got the following panic\\n\\n  kernel BUG at fs/btrfs/tree-log.c:1862!\\n  invalid opcode: 0000 [#1] SMP NOPTI\\n  CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305\\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014\\n  RIP: 0010:link_to_fixup_dir+0xd5/0xe0\\n  RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216\\n  RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0\\n  RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000\\n  RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001\\n  R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800\\n  R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065\\n  FS:  00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000\\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0\\n  Call Trace:\\n   replay_one_buffer+0x409/0x470\\n   ? btree_read_extent_buffer_pages+0xd0/0x110\\n   walk_up_log_tree+0x157/0x1e0\\n   walk_log_tree+0xa6/0x1d0\\n   btrfs_recover_log_trees+0x1da/0x360\\n   ? replay_one_extent+0x7b0/0x7b0\\n   open_ctree+0x1486/0x1720\\n   btrfs_mount_root.cold+0x12/0xea\\n   ? __kmalloc_track_caller+0x12f/0x240\\n   legacy_get_tree+0x24/0x40\\n   vfs_get_tree+0x22/0xb0\\n   vfs_kern_mount.part.0+0x71/0xb0\\n   btrfs_mount+0x10d/0x380\\n   ? vfs_parse_fs_string+0x4d/0x90\\n   legacy_get_tree+0x24/0x40\\n   vfs_get_tree+0x22/0xb0\\n   path_mount+0x433/0xa10\\n   __x64_sys_mount+0xe3/0x120\\n   do_syscall_64+0x3d/0x80\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nWe can get -EIO or any number of legitimate errors from\\nbtrfs_search_slot(), panicing here is not the appropriate response.  The\\nerror path for this code handles errors properly, simply return the\\nerror.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.271\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.271\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.235\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.193\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.124\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.42\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.9\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"2.6.29\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-18T11:35:43.006Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47145\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-18T11:35:43.006Z\", \"dateReserved\": \"2024-03-04T18:12:48.845Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-25T09:07:42.384Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.