CVE-2024-44958

Description

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.

Reserved 2024-08-21 | Published 2024-09-04 | Updated 2024-11-05 | Assigner Linux

Product status

Default status
unaffected

c5511d03ec09 before 2a3548c7ef2e
affected

c5511d03ec09 before 2cf7665efe45
affected

c5511d03ec09 before 65727331b601
affected

c5511d03ec09 before d0c87a3c6be1
affected

c5511d03ec09 before e22f910a26cc
affected

Default status
affected

4.20
affected

Any version before 4.20
unaffected

5.15.165
unaffected

6.1.105
unaffected

6.6.46
unaffected

6.10.5
unaffected

6.11
unaffected

References

git.kernel.org/...c/2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4

git.kernel.org/...c/2cf7665efe451e48d27953e6b5bc627d518c902b

git.kernel.org/...c/65727331b60197b742089855ac09464c22b96f66

git.kernel.org/...c/d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab

git.kernel.org/...c/e22f910a26cc2a3ac9c66b8e935ef2a7dd881117

cve.org (CVE-2024-44958)

nvd.nist.gov (CVE-2024-44958)

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