syscall: Temporarily enable user memory access in pass() while creating copy of message

1 files changed, 3 insertions, 0 deletions

diff --git a/src/syscall.zig b/src/syscall.zig
index 79959cd..763e20c 100644
--- a/src/syscall.zig
+++ b/src/syscall.zig
@@ -177,7 +177,10 @@ fn pass(proc: *const process.Info, trap_frame: *const TrapFrame) !void {
     const bytes = bytes_ptr[0..len];
 
     const copy = try channel.allocator().alloc(u8, bytes.len);
+    paging.setUserMemoryAccess(true);
     @memcpy(copy, bytes);
+    paging.setUserMemoryAccess(false);
+
     try channel.pass(proc.id, id, receiver, identify, copy);
 }