On 11/21/18 6:10 AM, Li Qiang wrote:
> fw_cfg_bootsplash() gets option parameter "splash-time"
> with qemu_opt_get(), then converts it to an integer by hand.
> It neglects to check that conversion for errors. This is
> needlessly complicated and error-prone. But as "splash-time
> not specified" is not the same as "splash-time=T" for any T,
> we need use qemu_opt_get() to check if splash time exists.
> This patch also make the qemu exit when finding or loading
> splash file failed.
>
> Signed-off-by: Li Qiang <liq...@gmail.com>
> Reviewed-by: Markus Armbruster <arm...@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
> ---
> v1->v2: drop error_report when read_splashfile() fails
>
> hw/nvram/fw_cfg.c | 35 +++++++++++++----------------------
> vl.c | 2 +-
> 2 files changed, 14 insertions(+), 23 deletions(-)
>
> diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
> index 946f765f7f..83d66818f6 100644
> --- a/hw/nvram/fw_cfg.c
> +++ b/hw/nvram/fw_cfg.c
> @@ -118,47 +118,38 @@ error:
>
> static void fw_cfg_bootsplash(FWCfgState *s)
> {
> - int boot_splash_time = -1;
> const char *boot_splash_filename = NULL;
> - char *p;
> + const char *boot_splash_time = NULL;
> char *filename, *file_data;
> gsize file_size;
> int file_type;
> - const char *temp;
>
> /* get user configuration */
> QemuOptsList *plist = qemu_find_opts("boot-opts");
> QemuOpts *opts = QTAILQ_FIRST(&plist->head);
> - if (opts != NULL) {
> - temp = qemu_opt_get(opts, "splash");
> - if (temp != NULL) {
> - boot_splash_filename = temp;
> - }
> - temp = qemu_opt_get(opts, "splash-time");
> - if (temp != NULL) {
> - p = (char *)temp;
> - boot_splash_time = strtol(p, &p, 10);
> - }
> - }
> + boot_splash_filename = qemu_opt_get(opts, "splash");
> + boot_splash_time = qemu_opt_get(opts, "splash-time");
>
> /* insert splash time if user configurated */
> - if (boot_splash_time >= 0) {
> + if (boot_splash_time) {
> + int64_t bst_val = qemu_opt_get_number(opts, "splash-time", -1);
> /* validate the input */
> - if (boot_splash_time > 0xffff) {
> - error_report("splash time is big than 65535, force it to
> 65535.");
> - boot_splash_time = 0xffff;
> + if (bst_val < 0 || bst_val > 0xffff) {
> + error_report("splash-time is invalid,"
> + "it should be a value between 0 and 65535");
> + exit(1);
> }
> /* use little endian format */
> - qemu_extra_params_fw[0] = (uint8_t)(boot_splash_time & 0xff);
> - qemu_extra_params_fw[1] = (uint8_t)((boot_splash_time >> 8) & 0xff);
> + qemu_extra_params_fw[0] = (uint8_t)(bst_val & 0xff);
> + qemu_extra_params_fw[1] = (uint8_t)((bst_val >> 8) & 0xff);
> fw_cfg_add_file(s, "etc/boot-menu-wait", qemu_extra_params_fw, 2);
> }
>
> /* insert splash file if user configurated */
> - if (boot_splash_filename != NULL) {
> + if (boot_splash_filename) {
> filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, boot_splash_filename);
> if (filename == NULL) {
> - error_report("failed to find file '%s'.", boot_splash_filename);
> + error_report("failed to find file '%s'", boot_splash_filename);
> return;
> }
>
> diff --git a/vl.c b/vl.c
> index fa25d1ae2d..96ac0ddcf6 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -336,7 +336,7 @@ static QemuOptsList qemu_boot_opts = {
> .type = QEMU_OPT_STRING,
> }, {
> .name = "splash-time",
> - .type = QEMU_OPT_STRING,
> + .type = QEMU_OPT_NUMBER,
> }, {
> .name = "reboot-timeout",
> .type = QEMU_OPT_STRING,
>
