Merge pull request #24 from Hoops/fix-occasional-segv-in-free

Prevent occasional SEGV when freeing list
anjia0532 · Mar 30, 2020 · 30a7466 · 30a7466
2 parents be2f319 + ea529cd
commit 30a7466
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/resty/maxminddb.lua b/lib/resty/maxminddb.lua
@@ -335,8 +335,9 @@ function _M.lookup(ip)
     return nil,'get entry data failed: ' .. mmdb_strerror(status)
   end  
 
+  local head = entry_data_list[0] -- Save so this can be passed to free fn.
   local _,status,result = _dump_entry_data_list(entry_data_list)
-  maxm.MMDB_free_entry_data_list(entry_data_list[0])
+  maxm.MMDB_free_entry_data_list(head)
 
   if status ~= MMDB_SUCCESS then
     return nil,'dump entry data failed: ' .. mmdb_strerror(status)