CVE-2021-47145
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
btrfs: do not BUG_ON in link_to_fixup_dir
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | 76bfd8ac20bebeae599452a03dfc5724c0475dcf | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | e934c4ee17b33bafb0444f2f9766cda7166d3c40 | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | 0eaf383c6a4a83c09f60fd07a1bea9f1a9181611 | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | 6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | 0ed102453aa1cd12fefde8f6b60b9519b0b1f003 | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | 7e13db503918820e6333811cdc6f151dcea5090a | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | b545442133580dcb2f2496133bf850824d41255c | Unavailable | None listed |
| e02119d5a7b4396c5a872582fddc8bd6d305a70a | affected | git | 91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.29 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.29 | Unavailable | None listed |
| 4.4.271 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.271 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.235 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.193 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.124 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.42 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.9 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |