[XrdCl] DeepLocate: AssignLBHandler preforms an operation on a dangling pointer

[simonmichal]

While handling a deep locate response the following scenario may occur:

• [XrdClFileSystem.cc : 154] in the HandleResponse method the FileSystem object gets allocated on the stack and calls asynchronous Locate
• [XrdClFileSystem.cc : 328] in the Locate method the Send method gets called in turn
• [XrdClFileSystem.cc : 1188] in the Send method a heap allocated AssignLBHandler is created and holds a pointer to the FileSystem object (stack allocated)
• [XrdClFileSystem.cc : 295] in the async callback the AssignLBHandler invokes a method on the FileSystem object that most likely exited the scope