CVE-2024-44958

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Source
https://nvd.nist.gov/vuln/detail/CVE-2024-44958
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-44958.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-44958
Downstream
Related
Published
2024-09-04T19:15:30Z
Modified
2025-08-09T19:01:26Z
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:

sched/smt: Fix unbalance schedsmtpresent dec/inc

I got the following warn report while doing stress test:

jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jumplabel.c:263 statickeyslowtrydec+0x9d/0xb0 Call Trace: <TASK> _statickeyslowdeccpuslocked+0x16/0x70 schedcpudeactivate+0x26e/0x2a0 cpuhpinvokecallback+0x3ad/0x10d0 cpuhpthreadfun+0x3f5/0x680 smpbootthreadfn+0x56d/0x8d0 kthread+0x309/0x400 retfromfork+0x41/0x70 retfromfork_asm+0x1b/0x30 </TASK>

Because when cpusetcpuinactive() fails in schedcpudeactivate(), the cpu offline failed, but schedsmtpresent is decremented before calling schedcpudeactivate(), it leads to unbalanced dec/inc, so fix it by incrementing schedsmtpresent in the error path.

References

Affected packages