fix get_active_super()/umount() race (1494583d) · Commits · e / devices / android_kernel_teracube_emerald

fs/super.c

+7 −7

Original line number	Diff line number	Diff line
		@@ -471,17 +471,17 @@ struct super_block get_active_super(struct block_device bdev)
		if (!bdev)
		return NULL;

		restart:
		spin_lock(&sb_lock);
		list_for_each_entry(sb, &super_blocks, s_list) {
		if (list_empty(&sb->s_instances))
		continue;
		if (sb->s_bdev != bdev)
		continue;

		if (sb->s_bdev == bdev) {
		if (grab_super(sb)) /* drops sb_lock */
		return sb;

		spin_lock(&sb_lock);
		else
		goto restart;
		}
		}
		spin_unlock(&sb_lock);
		return NULL;