This is a note to let you know that I've just added the patch titled
riscv: Fix spurious errors from __get/put_kernel_nofault
to the 5.15-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-fix-spurious-errors-from-__get-put_kernel_nofault.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d080a08b06b6266cc3e0e86c5acfd80db937cb6b Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel.holland@xxxxxxxxxx>
Date: Mon, 11 Mar 2024 19:19:13 -0700
Subject: riscv: Fix spurious errors from __get/put_kernel_nofault
From: Samuel Holland <samuel.holland@xxxxxxxxxx>
commit d080a08b06b6266cc3e0e86c5acfd80db937cb6b upstream.
These macros did not initialize __kr_err, so they could fail even if
the access did not fault.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: d464118cdc41 ("riscv: implement __get_kernel_nofault and __put_user_nofault")
Signed-off-by: Samuel Holland <samuel.holland@xxxxxxxxxx>
Reviewed-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Reviewed-by: Charlie Jenkins <charlie@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240312022030.320789-1-samuel.holland@xxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/include/asm/uaccess.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/riscv/include/asm/uaccess.h
+++ b/arch/riscv/include/asm/uaccess.h
@@ -467,7 +467,7 @@ unsigned long __must_check clear_user(vo
#define __get_kernel_nofault(dst, src, type, err_label) \
do { \
- long __kr_err; \
+ long __kr_err = 0; \
\
__get_user_nocheck(*((type *)(dst)), (type *)(src), __kr_err); \
if (unlikely(__kr_err)) \
@@ -476,7 +476,7 @@ do { \
#define __put_kernel_nofault(dst, src, type, err_label) \
do { \
- long __kr_err; \
+ long __kr_err = 0; \
\
__put_user_nocheck(*((type *)(src)), (type *)(dst), __kr_err); \
if (unlikely(__kr_err)) \
Patches currently in stable-queue which might be from samuel.holland@xxxxxxxxxx are
queue-5.15/riscv-fix-spurious-errors-from-__get-put_kernel_nofault.patch
