Changeset 766ed7c in rtems for c/src/exec/libnetworking/rtems/rtems_syscall.c

Patch from Eric Norum <eric@…>:

Remember the test to see if a socket could be read and written at
the same time by two different tasks? I discovered that if both
tasks attempt to close the socket a panic can occur from inside the
BSD code.

Closing the same socket twice from two different threads is
certainly an error, but a panic is not the greatest error reporting
method :-)

The following small change to the socket close routine should reduce
the chances of the panic.