perf: Fix __perf_event_overflow() vs perf_remove_from_context() race

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CVE-2026-23271 · Microsoft / collected KEV context

cve-program · CVE-2026-23271

• https://git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0
• https://git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86ef
• https://git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87
• https://git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12
• https://git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73e
• https://git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae

No related operational record is retained in the current change model.