From: Bruce Rogers Date: Mon, 25 Jan 2021 21:05:05 -0700 Subject: spice-app: avoid crash when core spice module isn't loaded When qemu is built with modules, but a given module doesn't load qemu should handle that gracefully. When ui-spice-core.so isn't able to be loaded and qemu is invoked with -display spice-app or -spice, qemu will dereference a null pointer. With this change we check the pointer before dereferencing and error out in a normal way. Signed-off-by: Bruce Rogers --- ui/spice-app.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/ui/spice-app.c b/ui/spice-app.c index 026124ef56a0ef26fbe3cf0a1aba..8ded9024a376da5c4802c1f87fd7 100644 --- a/ui/spice-app.c +++ b/ui/spice-app.c @@ -129,6 +129,7 @@ static void spice_app_atexit(void) static void spice_app_display_early_init(DisplayOptions *opts) { QemuOpts *qopts; + QemuOptsList *list; GError *err = NULL; if (opts->has_full_screen) { @@ -159,11 +160,16 @@ static void spice_app_display_early_init(DisplayOptions *opts) exit(1); } } + list = qemu_find_opts("spice"); + if (list == NULL) { + error_report("spice-app missing spice support\n"); + exit(1); + } type_register(&char_vc_type_info); sock_path = g_strjoin("", app_dir, "/", "spice.sock", NULL); - qopts = qemu_opts_create(qemu_find_opts("spice"), NULL, 0, &error_abort); + qopts = qemu_opts_create(list, NULL, 0, &error_abort); qemu_opt_set(qopts, "disable-ticketing", "on", &error_abort); qemu_opt_set(qopts, "unix", "on", &error_abort); qemu_opt_set(qopts, "addr", sock_path, &error_abort);