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-rw-r--r--subx/Readme.md3
1 files changed, 2 insertions, 1 deletions
diff --git a/subx/Readme.md b/subx/Readme.md
index 92e49d18..8970e97b 100644
--- a/subx/Readme.md
+++ b/subx/Readme.md
@@ -505,7 +505,8 @@ trace, or if you have questions or complaints.
 
 ### Data Structures
 
-* Kernel strings: null-terminated arrays of bytes.
+* Kernel strings: null-terminated arrays of bytes. Unsafe and to be avoided,
+  but needed for interacting with the kernel.
 
 * Strings: length-prefixed arrays of bytes. String contents are preceded by
   4 bytes (32 bytes) containing the `length` of the array.