Re: [PATCH] Fix io_read() and io_write() when io_import_fixed() is used.

[Jens Axboe]

On 2/4/20 7:05 AM, David Laight wrote:
> From: Jens Axboe
>> Sent: 04 February 2020 14:01
>> On 2/4/20 4:20 AM, David Laight wrote:
>>> io_import_fixed() returns 0 on success so io_import_iovec() may
>>> not return the length of the transfer.
>>>
>>> Instead always use the value from iov_iter_count()
>>> (Which is called at the same place.)
>>>
>>> Fixes 9d93a3f5a (modded by 491381ce0) and 9e645e110.
>>
>> What kernel is this against? This shouldn't be an issue
>> in anything newer than 5.3-stable.
> 
> Sources are 5.4.0-rc7.
> So not entirely 'the latest'.
> I didn't update late in the 5.5 cycle and won't until
> we get to rc4 (or so).

Ah ok, I think that's why. 5.4-stable will have a fix, 5.4.0
probably not. 5.5-rc and forward should be fine.

-- 
Jens Axboe