Re: [PATCH] usbip: vhci_hcd: check port number before using

[Shuah Khan]

On 10/08/2018 02:01 PM, Sudip Mukherjee wrote:
> On Mon, Oct 8, 2018 at 8:29 PM Shuah Khan <shuah@xxxxxxxxxx> wrote:
>>
>> Hi Sudip,
>>
>> On 10/08/2018 01:19 PM, Sudip Mukherjee wrote:
>>> From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
>>>
>>> The port number is checked and it just prints an error message but it
>>> still continues to use the invalid port. And as a result it accesses
>>> memory which is not its resulting in  BUG report from KASAN.
>>
>> Yes there is an issue with out of bounds access. But this isn't the
>> right fix.
>>
>>>
>>> Reported-by: syzbot+600b03e0cf1b73bb23c4@xxxxxxxxxxxxxxxxxxxxxxxxx
>>> Cc: stable <stable@xxxxxxxxxxxxxxx>
>>> Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx>
>>
>> I sent in a fix for this last Friday.
>>
>> https://patchwork.kernel.org/patch/10628833/
> 
> And I can confirm this patch also fixes the issue tested with the
> reproducer I was using in my vm.
> 
> 

Great Thanks for testing the patch.

thanks,
-- Shuah