Merge tag 'pci-v4.20-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa...

[linux.git] / net / netfilter / xt_IDLETIMER.c

diff --git a/net/netfilter/xt_IDLETIMER.c b/net/netfilter/xt_IDLETIMER.c
index c6acfc2d9c8414d36173e3cf09f94ea64f0d7515..eb4cbd244c3d311e2630a4c4cae868f0343c30f0 100644 (file)
--- a/net/netfilter/xt_IDLETIMER.c
+++ b/net/netfilter/xt_IDLETIMER.c
@@ -114,6 +114,22 @@ static void idletimer_tg_expired(struct timer_list *t)
        schedule_work(&timer->work);
 }
 
+static int idletimer_check_sysfs_name(const char *name, unsigned int size)
+{
+       int ret;
+
+       ret = xt_check_proc_name(name, size);
+       if (ret < 0)
+               return ret;
+
+       if (!strcmp(name, "power") ||
+           !strcmp(name, "subsystem") ||
+           !strcmp(name, "uevent"))
+               return -EINVAL;
+
+       return 0;
+}
+
 static int idletimer_tg_create(struct idletimer_tg_info *info)
 {
        int ret;
@@ -124,6 +140,10 @@ static int idletimer_tg_create(struct idletimer_tg_info *info)
                goto out;
        }
 
+       ret = idletimer_check_sysfs_name(info->label, sizeof(info->label));
+       if (ret < 0)
+               goto out_free_timer;
+
        sysfs_attr_init(&info->timer->attr.attr);
        info->timer->attr.attr.name = kstrdup(info->label, GFP_KERNEL);
        if (!info->timer->attr.attr.name) {