File 0001-dacp-Fix-segfault-from-invalid-queries.patch of Package owntone

From 5f526c7a7e08c567a5c72421d74a79dafdd07621 Mon Sep 17 00:00:00 2001
From: ejurgensen <espenjurgensen@gmail.com>
Date: Wed, 8 Oct 2025 19:49:01 +0200
Subject: [PATCH] [dacp] Fix segfault from invalid queries

When parsing a DACP request (pattern: ^/ctrl-int/[[:digit:]]+/playqueue-edit$)
with a command parameter being "move" and an edit-params parameter lacking a
colon, strchr(param, ':') at httpd_dacp.c:2038 will return NULL, and safe_atoi32
is called with its first parameter str being 1. This will bypass the NULL check
at src/misc.c:650 and causes a segmentation fault at the call to strtol at line
657.

Closes #1933
---
 src/httpd_dacp.c | 51 +++++++++++++++++++++++++++---------------------
 1 file changed, 29 insertions(+), 22 deletions(-)

Index: b/src/httpd_dacp.c
===================================================================
--- a/src/httpd_dacp.c	2026-02-08 12:00:11.308638744 +0200
+++ b/src/httpd_dacp.c	2026-02-08 12:08:01.780004195 +0200
@@ -1894,6 +1894,7 @@ dacp_reply_playqueueedit_add(struct http
   const char *querymodifier;
   const char *sort;
   const char *param;
+  const char *ptr;
   char modifiedquery[32];
   int mode;
   int plid;
@@ -1955,7 +1956,8 @@ dacp_reply_playqueueedit_add(struct http
   else
     {
       // Modify the query: Take the id from the editquery and use it as a queuefilter playlist id
-      ret = safe_atoi32(strchr(editquery, ':') + 1, &plid);
+      ptr = strchr(editquery, ':');
+      ret = ptr ? safe_atoi32(ptr + 1, &plid) : -1;
       if (ret < 0)
         {
 	  DPRINTF(E_LOG, L_DACP, "Invalid playlist id in request: %s\n", editquery);
@@ -2029,38 +2031,44 @@ dacp_reply_playqueueedit_move(struct htt
   struct player_status status;
   int ret;
   const char *param;
+  const char *ptr;
   int src;
   int dst;
 
   param = httpd_query_value_find(hreq->query, "edit-params");
-  if (param)
-  {
-    ret = safe_atoi32(strchr(param, ':') + 1, &src);
-    if (ret < 0)
-    {
-      DPRINTF(E_LOG, L_DACP, "Invalid edit-params move-from value in playqueue-edit request\n");
+  if (!param)
+    goto out;
 
-      dacp_send_error(hreq, "cacr", "Invalid request");
-      return -1;
-    }
+  ptr = strchr(param, ':');
+  if (!ptr)
+    goto error;
 
-    ret = safe_atoi32(strchr(param, ',') + 1, &dst);
-    if (ret < 0)
-    {
-      DPRINTF(E_LOG, L_DACP, "Invalid edit-params move-to value in playqueue-edit request\n");
+  ret = safe_atoi32(ptr + 1, &src);
+  if (ret < 0)
+    goto error;
 
-      dacp_send_error(hreq, "cacr", "Invalid request");
-      return -1;
-    }
+  ptr = strchr(param, ',');
+  if (!ptr)
+    goto error;
 
-    player_get_status(&status);
-    db_queue_move_byposrelativetoitem(src, dst, status.item_id, status.shuffle);
-  }
+  ret = safe_atoi32(ptr + 1, &dst);
+  if (ret < 0)
+    goto error;
 
+  player_get_status(&status);
+  db_queue_move_byposrelativetoitem(src, dst, status.item_id, status.shuffle);
+
+ out:
   /* 204 No Content is the canonical reply */
   httpd_send_reply(hreq, HTTP_NOCONTENT, "No Content", HTTPD_SEND_NO_GZIP);
 
   return 0;
+
+ error:
+  DPRINTF(E_LOG, L_DACP, "Invalid edit-params in playqueue-edit request: '%s'\n", param);
+
+  dacp_send_error(hreq, "cacr", "Invalid request");
+  return -1;
 }
 
 static int
@@ -2538,8 +2546,7 @@ dacp_reply_setspeakers(struct httpd_requ
     }
 
   nspk = 1;
-  ptr = param;
-  while ((ptr = strchr(ptr + 1, ',')))
+  for (ptr = param; ptr; ptr = strchr(ptr + 1, ','))
     nspk++;
 
   CHECK_NULL(L_DACP, ids = calloc((nspk + 1), sizeof(uint64_t)));