rng: initialize file descriptor to -1
The file descriptor is never initialized to -1, which makes rng-random
close stdin if an object is created and immediately destroyed. If we
change it to -1, we also need to protect qemu_set_fd_handler from
receiving a bogus file descriptor.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/backends/rng-random.c b/backends/rng-random.c
index 68dfc8a..136499d 100644
--- a/backends/rng-random.c
+++ b/backends/rng-random.c
@@ -123,15 +123,15 @@
NULL);
s->filename = g_strdup("/dev/random");
+ s->fd = -1;
}
static void rng_random_finalize(Object *obj)
{
RndRandom *s = RNG_RANDOM(obj);
- qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
-
if (s->fd != -1) {
+ qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
qemu_close(s->fd);
}