id = 1787
title = "Qemu asan test make vm crash when using qxl and spice"
state = "opened"
created_at = "2023-07-25T08:09:12.608Z"
closed_at = "n/a"
labels = []
url = "https://gitlab.com/qemu-project/qemu/-/issues/1787"
host-os = "linux-5.10"
host-arch = "x86"
qemu-version = "qemu-6.2.0"
guest-os = "kylinOS desktop（or other guestos with desktop）"
guest-arch = "x86"
description = """When I tested QEMU with asan, the vm crash. The error message is as follows：
![1](/uploads/a44f3790fe6c375aa8eac3a178da963d/1.jpg)"""
reproduce = """1.Start the vm with qxl and spice.
2.Attach the vm with vnc and spice.
3.Placed for more than three days.
4.Operation on spice client and possible reproduce this bug."""
additional = """https://github.com/qemu/qemu/blob/44f28df24767cf9dca1ddc9b23157737c4cbb645/ui/cursor.c#L112
I think the reason for the problem is that the cursor pointer was not set to NULL when qemu call cursor_put. But I don't know what situation will trigger this error.
This error is difficult to reproduce by natural."""