Comment 1 for bug 1716292

This happens for me also, with qemu version 2.12.0 (Debian 1:2.12+dfsg-3).

An initial patch was proposed here: https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg08073.html

Discussion pointed out some problems, and the patch languished and was not accepted.

Here is a summary of the changes needed for it to be more likely for the patch to be accepted: https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg03964.html

 - change from "ret = 0" to something like "ret = get_errno(safe_write(arg1, NULL, 0))"
 - change TARGET_NR_read to do the same, instead of its current short-circuit behaviour for count==0
 - check pread64/pwrite64 to see if they need a similar change as well