This is a note to let you know that I've just added the patch titled
riscv: mm: Fixup compat arch_get_mmap_end
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
riscv-mm-fixup-compat-arch_get_mmap_end.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 97b7ac69be2e5a683e898f5267f659fde52efdd5 Mon Sep 17 00:00:00 2001
From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
Date: Fri, 22 Dec 2023 06:57:01 -0500
Subject: riscv: mm: Fixup compat arch_get_mmap_end
From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
commit 97b7ac69be2e5a683e898f5267f659fde52efdd5 upstream.
When the task is in COMPAT mode, the arch_get_mmap_end should be 2GB,
not TASK_SIZE_64. The TASK_SIZE has contained is_compat_mode()
detection, so change the definition of STACK_TOP_MAX to TASK_SIZE
directly.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: add2cc6b6515 ("RISC-V: mm: Restrict address space for sv39,sv48,sv57")
Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
Signed-off-by: Guo Ren <guoren@xxxxxxxxxx>
Reviewed-by: Leonardo Bras <leobras@xxxxxxxxxx>
Reviewed-by: Charlie Jenkins <charlie@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231222115703.2404036-3-guoren@xxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/include/asm/processor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/include/asm/processor.h
+++ b/arch/riscv/include/asm/processor.h
@@ -15,7 +15,7 @@
#ifdef CONFIG_64BIT
#define DEFAULT_MAP_WINDOW (UL(1) << (MMAP_VA_BITS - 1))
-#define STACK_TOP_MAX TASK_SIZE_64
+#define STACK_TOP_MAX TASK_SIZE
#define arch_get_mmap_end(addr, len, flags) \
({ \
Patches currently in stable-queue which might be from guoren@xxxxxxxxxxxxxxxxx are
queue-6.6/riscv-mm-fixup-compat-mode-boot-failure.patch
queue-6.6/riscv-mm-fixup-compat-arch_get_mmap_end.patch
