From 8bae93ce181086769175e5c3fb0f0ef66fb9ca89 Mon Sep 17 00:00:00 2001
From: Dirk Engling <erdgeist@erdgeist.org>
Date: Fri, 6 Nov 2026 03:01:46 +0100
Subject: Stop reading a connection a worker has taken over

---
 src/ot_http.c      | 4 ++++
 src/ot_tcp.c       | 5 +++++
 src/trackerlogic.h | 3 +++
 3 files changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/ot_http.c b/src/ot_http.c
index e6a8db7..29f41a3 100644
--- a/src/ot_http.c
+++ b/src/ot_http.c
@@ -367,6 +367,7 @@ static ssize_t http_handle_stats(const int64_t sock, struct ot_workstruct *ws, c
        a home of its own and only then be made reachable by a worker thread */
     if (!http_adopt(sock))
       HTTPERROR_500;
+    ws->handed_off = 1;
     fullscrape_deliver(sock, format);
     return ws->reply_size = -2;
   }
@@ -383,6 +384,7 @@ static ssize_t http_handle_stats(const int64_t sock, struct ot_workstruct *ws, c
 
     if (!http_adopt(sock))
       HTTPERROR_500;
+    ws->handed_off = 1;
     stats_deliver(sock, mode);
     return ws->reply_size = -2;
   }
@@ -477,6 +479,7 @@ static ssize_t http_handle_fullscrape(const int64_t sock, struct ot_workstruct *
 
   if (!http_adopt(sock))
     HTTPERROR_500;
+  ws->handed_off = 1;
   fullscrape_deliver(sock, format);
   return ws->reply_size = -2;
 }
@@ -742,6 +745,7 @@ ssize_t http_handle_request(const int64_t sock, struct ot_workstruct *ws) {
      subroutine gets to answer: an error reply finishes with the connection
      on its way out, and ws outlives the connection it was serving */
   ws->keep_alive = 0;
+  ws->handed_off = 0;
 #ifdef WANT_KEEPALIVE
   if ((write_ptr = http_header(ws->request, ws->header_size, "connection")) && (*write_ptr == 'K' || *write_ptr == 'k'))
     ws->keep_alive = 1;
diff --git a/src/ot_tcp.c b/src/ot_tcp.c
index 1351b92..f93795b 100644
--- a/src/ot_tcp.c
+++ b/src/ot_tcp.c
@@ -79,6 +79,11 @@ void tcp_read(const int64_t sock, struct ot_workstruct *ws) {
     ws->request      = cookie->request.data;
     ws->request_size = (ssize_t)cookie->request.size;
     http_handle_request(sock, ws);
+
+    /* A worker owns the connection now, and the buffer this loop reads hangs
+       off it, so there is nothing here left to look at */
+    if (ws->handed_off)
+      return;
 #ifdef WANT_KEEPALIVE
     if (!ws->keep_alive)
 #endif
diff --git a/src/trackerlogic.h b/src/trackerlogic.h
index 4f970ba..d03d3b1 100644
--- a/src/trackerlogic.h
+++ b/src/trackerlogic.h
@@ -256,6 +256,9 @@ struct ot_workstruct {
   uint16_t rand48_state[3];
 
   int      keep_alive;
+
+  /* Set when a request path gave the connection to a worker thread. */
+  int      handed_off;
 };
 
 /* Everything a thread that serves requests needs for itself. Set up and torn
-- 
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