Unverified Commit 5c178472 authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Palmer Dabbelt
Browse files

riscv: define ILLEGAL_POINTER_VALUE for 64bit 



This is used in poison.h for poison pointer offset. Based on current
SV39, SV48 and SV57 vm layout, 0xdead000000000000 is a proper value
that is not mappable, this can avoid potentially turning an oops to
an expolit.

Signed-off-by: default avatarJisheng Zhang <jszhang@kernel.org>
Fixes: fbe934d6 ("RISC-V: Build Infrastructure")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240705170210.3236-1-jszhang@kernel.org


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent d6a19281

arch/riscv/Kconfig

+5 −0
Original line number Diff line number Diff line
@@ -320,6 +320,11 @@ config GENERIC_HWEIGHT 
config FIX_EARLYCON_MEM

	def_bool MMU



config ILLEGAL_POINTER_VALUE

	hex

	default 0 if 32BIT

	default 0xdead000000000000 if 64BIT



config PGTABLE_LEVELS

	int

	default 5 if 64BIT