From 1460c010a03bf9f8b93d4a41ee994c50f6299e81 Mon Sep 17 00:00:00 2001 From: Alexandre Ghiti Date: Sat, 13 Mar 2021 03:45:04 -0500 Subject: [PATCH] riscv: Ensure page table writes are flushed when initializing KASAN vmalloc Make sure that writes to kernel page table during KASAN vmalloc initialization are made visible by adding a sfence.vma. Signed-off-by: Alexandre Ghiti Reviewed-by: Palmer Dabbelt Fixes: 5036318a2e53 ("riscv/kasan: add KASAN_VMALLOC support") Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt --- arch/riscv/mm/kasan_init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index 3fc18f469efbc..5c35e0f71e885 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -187,6 +187,8 @@ void __init kasan_shallow_populate(void *start, void *end) } vaddr += PAGE_SIZE; } + + local_flush_tlb_all(); } void __init kasan_init(void) -- 2.39.5