CVE-2024-44958 (GCVE-0-2024-44958)
Vulnerability from cvelistv5
Published
2024-09-04 18:35
Modified
2026-05-23 15:53
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: c5511d03ec090980732e929c318a7a6374b5550e
Version: c5511d03ec090980732e929c318a7a6374b5550e
Version: c5511d03ec090980732e929c318a7a6374b5550e
Version: c5511d03ec090980732e929c318a7a6374b5550e
Version: c5511d03ec090980732e929c318a7a6374b5550e
Version: 01659361c63fdc91c0af239d08cdd211d590a656
Version: a2c094816f894b7a265851fad858e994fa0f78b3
Version: 4.14.86   ≤
Version: 4.19.7   ≤
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