CVE-2024-40980

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-40980
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-40980.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-40980
Related
Published
2024-07-12T13:15:19Z
Modified
2024-09-18T03:26:31.504897Z
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:

dropmonitor: replace spinlock by rawspinlock

tracedropcommon() is called with preemption disabled, and it acquires a spinlock. This is problematic for RT kernels because spinlocks are sleeping locks in this configuration, which causes the following splat:

BUG: sleeping function called from invalid context at kernel/locking/spinlockrt.c:48 inatomic(): 1, irqsdisabled(): 1, nonblock: 0, pid: 449, name: rcuc/47 preemptcount: 1, expected: 0 RCU nest depth: 2, expected: 2 5 locks held by rcuc/47/449: #0: ff1100086ec30a60 ((softirqctrl.lock)){+.+.}-{2:2}, at: _localbhdisableip+0x105/0x210 #1: ffffffffb394a280 (rcureadlock){....}-{1:2}, at: rtspinlock+0xbf/0x130 #2: ffffffffb394a280 (rcureadlock){....}-{1:2}, at: _localbhdisableip+0x11c/0x210 #3: ffffffffb394a160 (rcucallback){....}-{0:0}, at: rcudobatch+0x360/0xc70 #4: ff1100086ee07520 (&data->lock){+.+.}-{2:2}, at: tracedropcommon.constprop.0+0xb5/0x290 irq event stamp: 139909 hardirqs last enabled at (139908): [<ffffffffb1df2b33>] _rawspinunlockirqrestore+0x63/0x80 hardirqs last disabled at (139909): [<ffffffffb19bd03d>] tracedropcommon.constprop.0+0x26d/0x290 softirqs last enabled at (139892): [<ffffffffb07a1083>] _localbhenableip+0x103/0x170 softirqs last disabled at (139898): [<ffffffffb0909b33>] rcucpukthread+0x93/0x1f0 Preemption disabled at: [<ffffffffb1de786b>] rtmutexslowunlock+0xab/0x2e0 CPU: 47 PID: 449 Comm: rcuc/47 Not tainted 6.9.0-rc2-rt1+ #7 Hardware name: Dell Inc. PowerEdge R650/0Y2G81, BIOS 1.6.5 04/15/2022 Call Trace: <TASK> dumpstacklvl+0x8c/0xd0 dumpstack+0x14/0x20 _mightresched+0x21e/0x2f0 rtspinlock+0x5e/0x130 ? tracedropcommon.constprop.0+0xb5/0x290 ? skbqueuepurgereason.part.0+0x1bf/0x230 tracedropcommon.constprop.0+0xb5/0x290 ? preemptcountsub+0x1c/0xd0 ? rawspinunlockirqrestore+0x4a/0x80 ? _pfxtracedropcommon.constprop.0+0x10/0x10 ? rtmutexslowunlock+0x26a/0x2e0 ? skbqueuepurgereason.part.0+0x1bf/0x230 ? _pfxrtmutexslowunlock+0x10/0x10 ? skbqueuepurgereason.part.0+0x1bf/0x230 tracekfreeskbhit+0x15/0x20 tracekfreeskb+0xe9/0x150 kfreeskbreason+0x7b/0x110 skbqueuepurgereason.part.0+0x1bf/0x230 ? _pfxskbqueuepurgereason.part.0+0x10/0x10 ? marklock.part.0+0x8a/0x520 ...

tracedropcommon() also disables interrupts, but this is a minor issue because we could easily replace it with a local_lock.

Replace the spinlock with rawspin_lock to avoid sleeping in atomic context.

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
5.10.221-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2
5.10.158-1
5.10.158-2
5.10.162-1
5.10.178-1
5.10.178-2
5.10.178-3
5.10.179-1
5.10.179-2
5.10.179-3
5.10.179-4
5.10.179-5
5.10.191-1
5.10.197-1
5.10.205-1
5.10.205-2
5.10.209-1
5.10.209-2
5.10.216-1
5.10.218-1

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
6.1.99-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1

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
6.9.7-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
6.1.106-1
6.1.106-2
6.1.106-3
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1
6.4.4-1
6.4.4-2
6.4.4-3~bpo12+1
6.4.4-3
6.4.11-1
6.4.13-1
6.5~rc4-1~exp1
6.5~rc6-1~exp1
6.5~rc7-1~exp1
6.5.1-1~exp1
6.5.3-1~bpo12+1
6.5.3-1
6.5.6-1
6.5.8-1
6.5.10-1~bpo12+1
6.5.10-1
6.5.13-1
6.6.3-1~exp1
6.6.4-1~exp1
6.6.7-1~exp1
6.6.8-1
6.6.9-1
6.6.11-1
6.6.13-1~bpo12+1
6.6.13-1
6.6.15-1
6.6.15-2
6.7-1~exp1
6.7.1-1~exp1
6.7.4-1~exp1
6.7.7-1
6.7.9-1
6.7.9-2
6.7.12-1~bpo12+1
6.7.12-1
6.8.9-1
6.8.11-1
6.8.12-1~bpo12+1
6.8.12-1
6.9.2-1~exp1
6.9.7-1~bpo12+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}