发布时间: 2024年10月12日
修改时间: 2024年10月12日
In the Linux kernel, the following vulnerability has been resolved:sched/smt: Fix unbalance sched_smt_present dec/incI 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/0xb0Call 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 beforecalling sched_cpu_deactivate(), it leads to unbalanced dec/inc, sofix it by incrementing sched_smt_present in the error path.
| NVD | openEuler | |
|---|---|---|
| CVSS评分 | 5.5 | 5.5 |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality | None | None |
| Integrity | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-4876 | kernel security update | 2024年10月12日 |
| 产品 | 包 | 状态 |
|---|---|---|
| KY3.4-5A | kernel | Fixed |
| KY3.5.2 | kernel | Fixed |
| V6 | kernel | Fixed |
