CVE-2021-47145

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47145
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47145.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-47145
Related
Published
2024-03-25T09:15:08Z
Modified
2024-09-18T01:00:22Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

btrfs: do not BUGON in linktofixupdir

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:linktofixupdir+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: replayonebuffer+0x409/0x470 ? btreereadextentbufferpages+0xd0/0x110 walkuplogtree+0x157/0x1e0 walklogtree+0xa6/0x1d0 btrfsrecoverlogtrees+0x1da/0x360 ? replayoneextent+0x7b0/0x7b0 openctree+0x1486/0x1720 btrfsmountroot.cold+0x12/0xea ? _kmalloctrackcaller+0x12f/0x240 legacygettree+0x24/0x40 vfsgettree+0x22/0xb0 vfskernmount.part.0+0x71/0xb0 btrfsmount+0x10d/0x380 ? vfsparsefsstring+0x4d/0x90 legacygettree+0x24/0x40 vfsgettree+0x22/0xb0 pathmount+0x433/0xa10 _x64sysmount+0xe3/0x120 dosyscall64+0x3d/0x80 entrySYSCALL64after_hwframe+0x44/0xae

We can get -EIO or any number of legitimate errors from btrfssearchslot(), panicing here is not the appropriate response. The error path for this code handles errors properly, simply return the error.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.46-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.14.6-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.14.6-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}