diff --git a/sys/arm64/arm64/exception.S b/sys/arm64/arm64/exception.S
--- a/sys/arm64/arm64/exception.S
+++ b/sys/arm64/arm64/exception.S
@@ -250,9 +250,11 @@
 	KMSAN_ENTER
 	ldr	x0, [x18, #PC_CURTHREAD]
 	mov	x1, sp
+	mov	x22, x0
 	str	x1, [x0, #TD_FRAME]
 	bl	do_el0_sync
 	do_ast
+	str	xzr, [x22, #TD_FRAME]
 	KMSAN_LEAVE
 	restore_registers 0
 	ERET