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| author | Alexandre Ghiti <alexandre.ghiti@canonical.com> | 2021-10-29 06:59:27 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2021-10-29 08:54:50 -0700 |
| commit | 54c5639d8f507ebefa814f574cb6f763033a72a5 (patch) | |
| tree | ac9ba5ba08a776edb2f16e7482d6fb35d1fe4e06 /arch/riscv/mm/kasan_init.c | |
| parent | cf11d01135ea1ff7fddb612033e3cb5cde279ff2 (diff) | |
| download | linux-54c5639d8f507ebefa814f574cb6f763033a72a5.tar.gz linux-54c5639d8f507ebefa814f574cb6f763033a72a5.tar.bz2 linux-54c5639d8f507ebefa814f574cb6f763033a72a5.zip | |
riscv: Fix asan-stack clang build
Nathan reported that because KASAN_SHADOW_OFFSET was not defined in
Kconfig, it prevents asan-stack from getting disabled with clang even
when CONFIG_KASAN_STACK is disabled: fix this by defining the
corresponding config.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
Fixes: 8ad8b72721d0 ("riscv: Add KASAN support")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/mm/kasan_init.c')
| -rw-r--r-- | arch/riscv/mm/kasan_init.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/mm/kasan_init.c b/arch/riscv/mm/kasan_init.c index 89a8376ce44e..54294f83513d 100644 --- a/arch/riscv/mm/kasan_init.c +++ b/arch/riscv/mm/kasan_init.c @@ -17,6 +17,9 @@ asmlinkage void __init kasan_early_init(void) uintptr_t i; pgd_t *pgd = early_pg_dir + pgd_index(KASAN_SHADOW_START); + BUILD_BUG_ON(KASAN_SHADOW_OFFSET != + KASAN_SHADOW_END - (1UL << (64 - KASAN_SHADOW_SCALE_SHIFT))); + for (i = 0; i < PTRS_PER_PTE; ++i) set_pte(kasan_early_shadow_pte + i, mk_pte(virt_to_page(kasan_early_shadow_page), |