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fw_cfg: Fix -boot bootsplash error checking

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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 <liq3ea@gmail.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <1542777026-2788-2-git-send-email-liq3ea@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit is contained in:
Li Qiang 2018-11-20 21:10:24 -08:00 committed by Philippe Mathieu-Daudé
parent bed6633677
commit 6912bb0b3d
2 changed files with 14 additions and 23 deletions
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35
hw/nvram/fw_cfg.c
View File

@ -117,47 +117,38 @@ 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;
}

2
vl.c
View File

@ -338,7 +338,7 @@ 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,