Hi, Julia,
On 2017/3/14 13:37, Julia Lawall wrote:
> Line 460 looks suspicious. Can tmprange be different than range but not
> be an ERR_PTR? If so, lpcdev->io_host will have an invalid value.
>
Thanks for your pointing out!
You are right!
miss a line of 'return 0;'
if (tmprange != range) {
kfree(range);
if (IS_ERR(tmprange))
return -EFAULT;
return 0;
}
Thanks again!
Zhichang
> julia
>
> ---------- Forwarded message ----------
> Date: Tue, 14 Mar 2017 13:12:05 +0800
> From: kbuild test robot <fengguang.wu@xxxxxxxxx>
> To: kbuild@xxxxxx
> Cc: Julia Lawall <julia.lawall@xxxxxxx>
> Subject: Re: [PATCH V7 4/7] LPC: Support the device-tree LPC host on Hip06/Hip07
>
> Hi zhichang.yuan,
>
> [auto build test WARNING on linus/master]
> [also build test WARNING on v4.11-rc2 next-20170310]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url: https://github.com/0day-ci/linux/commits/zhichang-yuan/LPC-legacy-ISA-I-O-support/20170314-114635
> :::::: branch date: 85 minutes ago
> :::::: commit date: 85 minutes ago
>
>>> drivers/bus/hisi_lpc.c:465:19-24: ERROR: reference preceded by free on line 460
>
> git remote add linux-review https://github.com/0day-ci/linux
> git remote update linux-review
> git checkout 4e05ad6c3274fa75c903c7809ef0b51329a31ab2
> vim +465 drivers/bus/hisi_lpc.c
>
> 4e05ad6c zhichang.yuan 2017-03-13 454 range->flags = IO_HOST_INDIRECT;
> 4e05ad6c zhichang.yuan 2017-03-13 455 range->size = LPC_BUS_IO_SIZE;
> 4e05ad6c zhichang.yuan 2017-03-13 456 range->hw_start = LPC_MIN_BUS_RANGE;
> 4e05ad6c zhichang.yuan 2017-03-13 457
> 4e05ad6c zhichang.yuan 2017-03-13 458 tmprange = register_libio_range(range);
> 4e05ad6c zhichang.yuan 2017-03-13 459 if (tmprange != range) {
> 4e05ad6c zhichang.yuan 2017-03-13 @460 kfree(range);
> 4e05ad6c zhichang.yuan 2017-03-13 461 if (IS_ERR(tmprange))
> 4e05ad6c zhichang.yuan 2017-03-13 462 return -EFAULT;
> 4e05ad6c zhichang.yuan 2017-03-13 463 }
> 4e05ad6c zhichang.yuan 2017-03-13 464
> 4e05ad6c zhichang.yuan 2017-03-13 @465 lpcdev->io_host = range;
> 4e05ad6c zhichang.yuan 2017-03-13 466
> 4e05ad6c zhichang.yuan 2017-03-13 467 return 0;
> 4e05ad6c zhichang.yuan 2017-03-13 468 }
>
> ---
> 0-DAY kernel test infrastructure Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all Intel Corporation
>
> .
>
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