diff options
| author | Jisheng Zhang <jszhang@kernel.org> | 2024-07-06 01:02:10 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-09-15 20:15:40 -0700 |
| commit | 5c178472af247c7b50f962495bb7462ba453b9fb (patch) | |
| tree | cd6616a4bd6d0912fdcbf799d50e6cd759d56230 /arch/riscv | |
| parent | d6a1928134a1c626ff369129d7a80951b2949a48 (diff) | |
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: Jisheng Zhang <jszhang@kernel.org>
Fixes: fbe934d69eb7 ("RISC-V: Build Infrastructure")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240705170210.3236-1-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 4871220061c4..31d941792369 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -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 |