Created attachment 329709 [details] proposed fix Description of problem: When (without -pipe) the child exits, state->pipe is cleared but state->pid is not. Later on, state->pid is used to determine whether to send a message to the child (via state->pipe) it tests only the value of state->pid. This can be forced by running with -window and resizing the window between child runs (which attempts to ioctl TIOCWINSZ on the pipe). Version-Release number of selected component (if applicable): xscreensaver-extras-5.08-1.fc9.x86_64 How reproducible: The resize case, very. I think there's another semi-random crash case too though. Steps to Reproduce: 1. Run phosphor with -window 2. Resize window 3. Actual results: SEGV Expected results: No SEGV Additional info: Attached patch does two things: clear state->pid once we know the child has exited, and check state->pipe before attempting to dereference it.
Well, I can reproduce what you see and your proposal patch seems reasonable. I will release the modified xscreensaver, thanks.
5.08-5.fc{11,10,9} is submitted: For F-9: http://koji.fedoraproject.org/koji/buildinfo?buildID=79778
xscreensaver-5.08-5.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.
xscreensaver-5.08-5.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.