cdrom: don't open-code memdup_user() (abb0f6a7) · Commits · 戴 / test

drivers/cdrom/cdrom.c

+3 −7

Original line number	Diff line number	Diff line
		@@ -3186,15 +3186,11 @@ static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
		if (!CDROM_CAN(CDC_DVD))
		return -ENOSYS;

		s = kmalloc(size, GFP_KERNEL);
		if (!s)
		return -ENOMEM;
		s = memdup_user(arg, size);
		if (IS_ERR(s))
		return PTR_ERR(s);

		cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
		if (copy_from_user(s, arg, size)) {
		kfree(s);
		return -EFAULT;
		}

		ret = dvd_read_struct(cdi, s, cgc);
		if (ret)