CVE-2021-47145
- Source
- https://cve.org/CVERecord?id=CVE-2021-47145
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47145.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47145
- Downstream
- Related
- Published
- 2024-03-25T09:15:08Z
- Modified
- 2026-03-13T05:20:34Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://git.kernel.org/stable/c/6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa
- https://git.kernel.org/stable/c/76bfd8ac20bebeae599452a03dfc5724c0475dcf
- https://git.kernel.org/stable/c/7e13db503918820e6333811cdc6f151dcea5090a
- https://git.kernel.org/stable/c/91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d
- https://git.kernel.org/stable/c/b545442133580dcb2f2496133bf850824d41255c
- https://git.kernel.org/stable/c/e934c4ee17b33bafb0444f2f9766cda7166d3c40
- https://git.kernel.org/stable/c/0eaf383c6a4a83c09f60fd07a1bea9f1a9181611
- https://git.kernel.org/stable/c/0ed102453aa1cd12fefde8f6b60b9519b0b1f003
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47145.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.4.271"
}
]
},
{
"events": [
{
"introduced": "4.5"
},
{
"fixed": "4.9.271"
}
]
},
{
"events": [
{
"introduced": "4.10"
},
{
"fixed": "4.14.235"
}
]
},
{
"events": [
{
"introduced": "4.15"
},
{
"fixed": "4.19.193"
}
]
},
{
"events": [
{
"introduced": "4.20"
},
{
"fixed": "5.4.124"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.42"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.12.9"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.13-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.13-rc2"
}
]
}
]