This is a note to let you know that I've just added the patch titled
riscv: uaccess: fix type of 0 variable on error in get_user()
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-uaccess-fix-type-of-0-variable-on-error-in-get_user.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 b9b916aee6715cd7f3318af6dc360c4729417b94 Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben-linux@xxxxxxxxx>
Date: Thu, 29 Dec 2022 17:05:45 +0000
Subject: riscv: uaccess: fix type of 0 variable on error in get_user()
From: Ben Dooks <ben-linux@xxxxxxxxx>
commit b9b916aee6715cd7f3318af6dc360c4729417b94 upstream.
If the get_user(x, ptr) has x as a pointer, then the setting
of (x) = 0 is going to produce the following sparse warning,
so fix this by forcing the type of 'x' when access_ok() fails.
fs/aio.c:2073:21: warning: Using plain integer as NULL pointer
Signed-off-by: Ben Dooks <ben-linux@xxxxxxxxx>
Reviewed-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221229170545.718264-1-ben-linux@xxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/include/asm/uaccess.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/include/asm/uaccess.h
+++ b/arch/riscv/include/asm/uaccess.h
@@ -216,7 +216,7 @@ do { \
might_fault(); \
access_ok(__p, sizeof(*__p)) ? \
__get_user((x), __p) : \
- ((x) = 0, -EFAULT); \
+ ((x) = (__force __typeof__(x))0, -EFAULT); \
})
#define __put_user_asm(insn, x, ptr, err) \
Patches currently in stable-queue which might be from ben-linux@xxxxxxxxx are
queue-5.15/riscv-uaccess-fix-type-of-0-variable-on-error-in-get_user.patch
