Read complete bounded Memcached responses

2026-07-20 23:24:57 +00:00
parent 0c75703186
commit 10e6565037
7 changed files with 263 additions and 19 deletions
@@ -214,6 +214,14 @@ hostcall loop therefore cannot renew an invocation indefinitely. Blocking host
 helpers retain operation-specific limits and cap them to the remaining
 invocation budget where the underlying operation is cancellable. Forked task
 callbacks receive a fresh invocation deadline capped by the task lifetime.
+The Memcached ASCII hostcall applies one deadline to the complete command write
+and protocol-framed response read. Retrieval payload lengths are parsed, so a
+payload containing `END` cannot terminate the response; multi-value and `stats`
+responses may span socket chunks up to the 8 MiB response bound. Timeout,
+malformed framing, or overflow shuts down the retained descriptor before
+returning an empty result, preventing unread response bytes from poisoning the
+next command on that connection. The native fallback uses the same parser and
+deadline contract.
 Synchronous compiler locks, transitive `#load` compilation, and compiler child
 processes consume that same deadline. Compiler children run in a dedicated
 process group; timeout kills the group, retains the previous generation, and