In the Linux kernel, the following vulnerability has been resolved: udptunnel: use netdevwarn() instead of netdevWARN() netdevWARN() uses WARN/WARNON to print a backtrace along with file and line information. In this case, udptunnelnicregister() returning an error is just a failed operation, not a kernel bug. udptunnelnicregister() can fail due to a memory allocation failure (kzalloc() or udptunnelnicalloc()). This is a normal runtime error and not a kernel bug. Replace netdevWARN() with netdevwarn() accordingly.