CVE-2024-44958 (GCVE-0-2024-44958)

Vulnerability from cvelistv5 – Published: 2024-09-04 18:35 – Updated: 2025-11-03 22:14
VLAI?
Title
sched/smt: Fix unbalance sched_smt_present dec/inc
Summary
In the Linux kernel, the following vulnerability has been resolved: sched/smt: Fix unbalance sched_smt_present dec/inc I got the following warn report while doing stress test: jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0 Call Trace: <TASK> __static_key_slow_dec_cpuslocked+0x16/0x70 sched_cpu_deactivate+0x26e/0x2a0 cpuhp_invoke_callback+0x3ad/0x10d0 cpuhp_thread_fun+0x3f5/0x680 smpboot_thread_fn+0x56d/0x8d0 kthread+0x309/0x400 ret_from_fork+0x41/0x70 ret_from_fork_asm+0x1b/0x30 </TASK> Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(), the cpu offline failed, but sched_smt_present is decremented before calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so fix it by incrementing sched_smt_present in the error path.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c5511d03ec090980732e929c318a7a6374b5550e , < 2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4 (git)
Affected: c5511d03ec090980732e929c318a7a6374b5550e , < 2cf7665efe451e48d27953e6b5bc627d518c902b (git)
Affected: c5511d03ec090980732e929c318a7a6374b5550e , < 65727331b60197b742089855ac09464c22b96f66 (git)
Affected: c5511d03ec090980732e929c318a7a6374b5550e , < d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab (git)
Affected: c5511d03ec090980732e929c318a7a6374b5550e , < e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 (git)
Affected: 01659361c63fdc91c0af239d08cdd211d590a656 (git)
Affected: a2c094816f894b7a265851fad858e994fa0f78b3 (git)
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    Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.105 , ≤ 6.1.* (semver)
Unaffected: 6.6.46 , ≤ 6.6.* (semver)
Unaffected: 6.10.5 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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