kernel: refactor CMD_GET_FULL_VERSION to safely initialize version string (#220)

Use strscpy()/strlcpy() to populate the version buffer in CMD_GET_FULL_VERSION
instead of relying on uninitialized memory. This ensures the returned string
is null-terminated and avoids exposing garbage data to user space.

Signed-off-by: schqiushui <orochi9999@gmail.com>

userspace/ksud/src/boot_patch.rs

@@ -519,7 +519,7 @@ fn do_patch(
     let no_vendor_init_boot = !workdir
         .join("vendor_ramdisk")
         .join("init_boot.cpio")
-        .exists();Add commentMore actions
+        .exists();
     if no_ramdisk && no_vendor_init_boot {
         bail!("No compatible ramdisk found.");
     }