Avoid SEGV in IOHandler dispatch, by Daniel P. Berrange.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3132 c046a42c-6fe2-441c-8c8c-71466251a162

Avoid SEGV in IOHandler dispatch, by Daniel P. Berrange.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3132 c046a42c-6fe2-441c-8c8c-71466251a162
ths
1 parent 70f23b77
Showing 1 changed file with 2 additions and 4 deletions
vl.c
@@ -6823,12 +6823,10 @@ void main_loop_wait(int timeout)
         IOHandlerRecord **pioh;
  
         for(ioh = first_io_handler; ioh != NULL; ioh = ioh->next) {
-            if (ioh->deleted)
-                continue;
-            if (FD_ISSET(ioh->fd, &rfds)) {
+            if (!ioh->deleted && ioh->fd_read && FD_ISSET(ioh->fd, &rfds)) {
                 ioh->fd_read(ioh->opaque);
             }
-            if (FD_ISSET(ioh->fd, &wfds)) {
+            if (!ioh->deleted && ioh->fd_write && FD_ISSET(ioh->fd, &wfds)) {
                 ioh->fd_write(ioh->opaque);
             }
         }