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ARM fix for v6.9 

- clear stale KASan stack poison when a CPU resumes
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux

Pull ARM fix from Russell King:

 - clear stale KASan stack poison when a CPU resumes

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
  ARM: 9381/1: kasan: clear stale stack poison
This commit is contained in:
Linus Torvalds 2024-05-09 08:44:13 -07:00
parent 1bbc991585 c4238686f9
commit 62788b0f22
1 changed files with 4 additions and 0 deletions
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4
arch/arm/kernel/sleep.S
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@ -127,6 +127,10 @@ cpu_resume_after_mmu:
instr_sync
#endif
bl cpu_init @ restore the und/abt/irq banked regs
#if defined(CONFIG_KASAN) && defined(CONFIG_KASAN_STACK)
mov r0, sp
bl kasan_unpoison_task_stack_below
#endif
mov r0, #0 @ return zero on success
ldmfd sp!, {r4 - r11, pc}
ENDPROC(cpu_resume_after_mmu)