riscv: Fix config KASAN && DEBUG_VIRTUAL

__virt_to_phys function is called very early in the boot process (ie kasan_early_init) so it should not be instrumented by KASAN otherwise it bugs. Fix this by declaring phys_addr.c as non-kasan instrumentable. Signed-off-by: Alexandre Ghiti <[email protected]> Fixes: 8ad8b72 (riscv: Add KASAN support) Cc: [email protected] Signed-off-by: Palmer Dabbelt <[email protected]>
niw · Mar 3, 2022 · c648c4b · c648c4b
1 parent 5f763b3
commit c648c4b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile
@@ -24,6 +24,9 @@ obj-$(CONFIG_KASAN)   += kasan_init.o
 ifdef CONFIG_KASAN
 KASAN_SANITIZE_kasan_init.o := n
 KASAN_SANITIZE_init.o := n
+ifdef CONFIG_DEBUG_VIRTUAL
+KASAN_SANITIZE_physaddr.o := n
+endif
 endif
 
 obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o