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authorLi Qiang <liq3ea@gmail.com>2018-11-20 21:10:25 -0800
committerPhilippe Mathieu-Daudé <philmd@redhat.com>2019-01-04 15:30:52 +0100
commitee5d0f89de3e53cdb0dcf51acc1502b310ed3bd2 (patch)
treecf2978fedf0fa852333168ba137cddb58500d520
parent6912bb0b3d3b140c70d8cdfd2dff77f9890d7f12 (diff)
downloadqemu-arm-ee5d0f89de3e53cdb0dcf51acc1502b310ed3bd2.tar.gz
fw_cfg: Fix -boot reboot-timeout error checking
fw_cfg_reboot() gets option parameter "reboot-timeout" with qemu_opt_get(), then converts it to an integer by hand. It neglects to check that conversion for errors, and fails to reject negative values. Positive values above the limit get reported and replaced by the limit. This patch checks for conversion errors properly, and reject all values outside 0...0xffff. 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: <1542777026-2788-3-git-send-email-liq3ea@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
-rw-r--r--hw/nvram/fw_cfg.c27
-rw-r--r--vl.c2
2 files changed, 14 insertions, 15 deletions
diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c
index ad91abdbb7..cba58344f5 100644
--- a/hw/nvram/fw_cfg.c
+++ b/hw/nvram/fw_cfg.c
@@ -176,26 +176,25 @@ static void fw_cfg_bootsplash(FWCfgState *s)
static void fw_cfg_reboot(FWCfgState *s)
{
- int reboot_timeout = -1;
- char *p;
- const char *temp;
+ const char *reboot_timeout = NULL;
+ int64_t rt_val = -1;
/* get user configuration */
QemuOptsList *plist = qemu_find_opts("boot-opts");
QemuOpts *opts = QTAILQ_FIRST(&plist->head);
- if (opts != NULL) {
- temp = qemu_opt_get(opts, "reboot-timeout");
- if (temp != NULL) {
- p = (char *)temp;
- reboot_timeout = strtol(p, &p, 10);
+ reboot_timeout = qemu_opt_get(opts, "reboot-timeout");
+
+ if (reboot_timeout) {
+ rt_val = qemu_opt_get_number(opts, "reboot-timeout", -1);
+ /* validate the input */
+ if (rt_val < 0 || rt_val > 0xffff) {
+ error_report("reboot timeout is invalid,"
+ "it should be a value between 0 and 65535");
+ exit(1);
}
}
- /* validate the input */
- if (reboot_timeout > 0xffff) {
- error_report("reboot timeout is larger than 65535, force it to 65535.");
- reboot_timeout = 0xffff;
- }
- fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&reboot_timeout, 4), 4);
+
+ fw_cfg_add_file(s, "etc/boot-fail-wait", g_memdup(&rt_val, 4), 4);
}
static void fw_cfg_write(FWCfgState *s, uint8_t value)
diff --git a/vl.c b/vl.c
index a24e5e076d..efa4ff9da5 100644
--- a/vl.c
+++ b/vl.c
@@ -341,7 +341,7 @@ static QemuOptsList qemu_boot_opts = {
.type = QEMU_OPT_NUMBER,
}, {
.name = "reboot-timeout",
- .type = QEMU_OPT_STRING,
+ .type = QEMU_OPT_NUMBER,
}, {
.name = "strict",
.type = QEMU_OPT_BOOL,