[PATCH 6.6 224/252] riscv: Fix spurious errors from __get/put_kernel_nofault

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6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

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
@@ -319,7 +319,7 @@ 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))						\
@@ -328,7 +328,7 @@ 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))						\






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