On Wed, Jan 27, 2016 at 12:38:14PM +0200, Avi Kivity wrote: > On 11/19/2015 10:25 PM, Jan Kara wrote: > >Assume a filesystem with 4KB blocks. When a file has size 1000 bytes and > >we issue direct IO read at offset 1024, blockdev_direct_IO() reads the > >tail of the last block and the logic for handling short DIO reads in > >dio_complete() results in a return value -24 (1000 - 1024) which > >obviously confuses userspace. > > > >Fix the problem by bailing out early once we sample i_size and can > >reliably check that direct IO read starts beyond i_size. > > > >Reported-by: Avi Kivity <avi@xxxxxxxxxxxx> > >Fixes: 9fe55eea7e4b444bafc42fa0000cc2d1d2847275 > >CC: stable@xxxxxxxxxxxxxxx > > While this patch made it into upstream, it did not appear in 4.3.4. Did it > slip through the proverbial cracks? Can it be queued for 4.3.5? There are over 400 patches right now in my queue that haven't made it into a 4.3.x kernel. These are in the queue, in good company :) I'll go dig these out as I guess people care about them more than others... thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html