In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix oops due to non-existence of prealloc backlog struct If an AFRXRPC service socket is opened and bound, but calls are preallocated, then rxrpcallocincomingcall() will oops because the rxrpcbacklog struct doesn't get allocated until the first preallocation is made. Fix this by returning NULL from rxrpcallocincomingcall() if there is no backlog struct. This will cause the incoming call to be aborted.