In zfs_write(), the loop continues to the next iteration without
accounting for partial copies occurring in uiomove_iov when
copy_from_user/__copy_from_user_inatomic return a non-zero status.
This results in "zfs: accessing past end of object..." in the
kernel log, and the write failing.
Account for partial copies and update uio struct before returning
EFAULT, leave a comment explaining the reason why this is done.
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: ilbsmart <wgqimut@gmail.com>
Signed-off-by: Fabio Scaccabarozzi <fsvm88@gmail.com>
Closes#8673Closes#10148
c9e3efdb3a