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D31209.id92315.diff
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D31209.id92315.diff

Index: sys/riscv/riscv/copyinout.S
===================================================================
--- sys/riscv/riscv/copyinout.S
+++ sys/riscv/riscv/copyinout.S
@@ -118,7 +118,7 @@
beqz a2, copyout_end /* If len == 0 then skip loop */
add a3, a1, a2
li a4, VM_MAXUSER_ADDRESS
- bgt a3, a4, copyio_fault_nopcb
+ bgeu a3, a4, copyio_fault_nopcb
copycommon
@@ -136,7 +136,7 @@
beqz a2, copyin_end /* If len == 0 then skip loop */
add a3, a0, a2
li a4, VM_MAXUSER_ADDRESS
- bgt a3, a4, copyio_fault_nopcb
+ bgeu a3, a4, copyio_fault_nopcb
copycommon
@@ -159,7 +159,7 @@
ENTER_USER_ACCESS(a7)
li a7, VM_MAXUSER_ADDRESS
-1: bgt a0, a7, copyio_fault
+1: bgeu a0, a7, copyio_fault
lb a4, 0(a0) /* Load from uaddr */
addi a0, a0, 1
sb a4, 0(a1) /* Store in kaddr */

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