moonchen commented on PR #13667:
URL: https://github.com/apache/trafficserver/pull/13667#issuecomment-5641118204

   Added the exact-size TCP_INFO check in 004c8b9c0f. A successful `getsockopt` 
call is accepted only when `tinfo_len == sizeof(tinfo)`; a size mismatch leaves 
all four log fields at `-1`.
   
   The Linux build, TCP_INFO and LogAccess unit tests, and existing AuTest 
pass. A local syscall shim also verified the short-reply case: a successful 
call reporting one byte less than requested was accepted by the previous build 
and rejected by the new build. Normal replies still log real values.
   


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