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CVE-2021-47145— btrfs: do not BUG_ON in link_to_fixup_dir

AI Predicted 4.7 Difficulty: Theoretical EPSS 0.27% · P20

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxe02119d5a7b4396c5a872582fddc8bd6d305a70a< 76bfd8ac20bebeae599452a03dfc5724c0475dcfaffected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< e934c4ee17b33bafb0444f2f9766cda7166d3c40affected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< 0eaf383c6a4a83c09f60fd07a1bea9f1a9181611affected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< 6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9faaffected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< 0ed102453aa1cd12fefde8f6b60b9519b0b1f003affected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< 7e13db503918820e6333811cdc6f151dcea5090aaffected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< b545442133580dcb2f2496133bf850824d41255caffected
e02119d5a7b4396c5a872582fddc8bd6d305a70a< 91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96daffected
… +10 more rows
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux e02119d5a7b4396c5a872582fddc8bd6d305a70a ~ 76bfd8ac20bebeae599452a03dfc5724c0475dcf -
LinuxLinux 2.6.29 -

II. Public POCs for CVE-2021-47145

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III. Intelligence Information for CVE-2021-47145

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Other References for CVE-2021-47145 (8)

Same Patch Batch · Linux · 2024-03-25 · 40 CVEs total

CVE-2021-471379.8 CRITICALnet: lantiq: fix memory corruption in RX ring
CVE-2021-471629.8 CRITICALtipc: skb_linearize the head skb when reassembling msgs
CVE-2021-471689.8 CRITICALNFS: fix an incorrect limit in filelayout_decode_layout()
CVE-2021-471368.6 HIGHnet: zero-initialize tc skb extension on allocation
CVE-2021-471608.1 HIGHnet: dsa: mt7530: fix VLAN traffic leaks
CVE-2021-471427.8 HIGHdrm/amdgpu: Fix a use-after-free
CVE-2021-471757.8 HIGHnet/sched: fq_pie: fix OOB access in the traffic path
CVE-2021-471487.8 HIGHocteontx2-pf: fix a buffer overflow in otx2_set_rxfh_context()
CVE-2021-471637.8 HIGHtipc: wait and exit until all work queues are done
CVE-2021-471527.8 HIGHmptcp: fix data stream corruption
CVE-2021-471537.8 HIGHi2c: i801: Don't generate an interrupt on bus reset
CVE-2021-471587.8 HIGHnet: dsa: sja1105: add error handling in sja1105_setup()
CVE-2021-471597.8 HIGHnet: dsa: fix a crash if ->get_sset_count() fails
CVE-2021-471787.5 HIGHscsi: target: core: Avoid smp_processor_id() in preemptible code
CVE-2021-471797.5 HIGHNFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
CVE-2021-47180NFC: nci: fix memory leak in nci_allocate_device
CVE-2021-47169serial: rp2: use 'request_firmware' instead of 'request_firmware_nowait'
CVE-2021-47170USB: usbfs: Don't WARN about excessively large memory allocations
CVE-2021-47167NFS: Fix an Oopsable condition in __nfs_pageio_add_request()
CVE-2021-47171net: usb: fix memory leak in smsc75xx_bind

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47145

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