CVE-2021-47145— btrfs: do not BUG_ON in link_to_fixup_dir
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I. Basic Information for CVE-2021-47145
Vulnerability Information
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Vulnerability Title
btrfs: do not BUG_ON in link_to_fixup_dir
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在注入测试时会引起内核恐慌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47145
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Same Patch Batch · Linux · 2024-03-25 · 40 CVEs total
| CVE-2021-47171 | net: usb: fix memory leak in smsc75xx_bind | |
| CVE-2021-47162 | tipc: skb_linearize the head skb when reassembling msgs | |
| CVE-2021-47163 | tipc: wait and exit until all work queues are done | |
| CVE-2021-47164 | net/mlx5e: Fix null deref accessing lag dev | |
| CVE-2021-47165 | drm/meson: fix shutdown crash when component not probed | |
| CVE-2021-47166 | NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() | |
| CVE-2021-47167 | NFS: Fix an Oopsable condition in __nfs_pageio_add_request() | |
| CVE-2021-47168 | NFS: fix an incorrect limit in filelayout_decode_layout() | |
| CVE-2021-47169 | serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait' | |
| CVE-2021-47170 | USB: usbfs: Don't WARN about excessively large memory allocations | |
| CVE-2021-47161 | spi: spi-fsl-dspi: Fix a resource leak in an error handling path | |
| CVE-2021-47172 | iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers | |
| CVE-2021-47173 | misc/uss720: fix memory leak in uss720_probe | |
| CVE-2021-47174 | netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version | |
| CVE-2021-47175 | net/sched: fq_pie: fix OOB access in the traffic path | |
| CVE-2021-47176 | s390/dasd: add missing discipline function | |
| CVE-2021-47177 | iommu/vt-d: Fix sysfs leak in alloc_iommu() | |
| CVE-2021-47178 | scsi: target: core: Avoid smp_processor_id() in preemptible code | |
| CVE-2021-47179 | NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() | |
| CVE-2021-47180 | NFC: nci: fix memory leak in nci_allocate_device |
Showing top 20 of 40 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2021-47145
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