Bug 215019

Summary:	KASAN: sanitize per-cpu allocations
Product:	Memory Management	Reporter:	Andrey Konovalov (andreyknvl)
Component:	Sanitizers	Assignee:	MM/Sanitizers virtual assignee (mm_sanitizers)
Status:	NEW ---
Severity:	normal	CC:	kasan-dev
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	upstream	Subsystem:
Regression:	No	Bisected commit-id:

Description Andrey Konovalov 2021-11-14 21:15:08 UTC

Per-CPU allocator (mm/percpu.c) is missing any kind of KASAN annotations. This likely means that KASAN can't detect overflows between per-CPU variables or __alloc_percpu() allocations. This needs to be investigated, and appropriate annotations need to be added.