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| author | Alexandre Ghiti <alexandre.ghiti@canonical.com> | 2022-02-25 13:39:49 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-03-03 22:11:30 +0100 |
| commit | a3d328037846d013bb4c7f3777241e190e4c75e1 (patch) | |
| tree | d79229ff688adac37205ca9118d99d7fe54e9519 | |
| parent | riscv: Fix is_linear_mapping with recent move of KASAN region (diff) | |
| download | linux-a3d328037846d013bb4c7f3777241e190e4c75e1.tar.xz linux-a3d328037846d013bb4c7f3777241e190e4c75e1.zip | |
riscv: Fix config KASAN && SPARSEMEM && !SPARSE_VMEMMAP
In order to get the pfn of a struct page* when sparsemem is enabled
without vmemmap, the mem_section structures need to be initialized which
happens in sparse_init.
But kasan_early_init calls pfn_to_page way before sparse_init is called,
which then tries to dereference a null mem_section pointer.
Fix this by removing the usage of this function in kasan_early_init.
Fixes: 8ad8b72721d0 ("riscv: Add KASAN support")
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/mm/kasan_init.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index f61f7ca6fe0f..85e849318389 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -202,8 +202,7 @@ asmlinkage void __init kasan_early_init(void) for (i = 0; i < PTRS_PER_PTE; ++i) set_pte(kasan_early_shadow_pte + i, - mk_pte(virt_to_page(kasan_early_shadow_page), - PAGE_KERNEL)); + pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KERNEL)); for (i = 0; i < PTRS_PER_PMD; ++i) set_pmd(kasan_early_shadow_pmd + i, |