<div dir="ltr"><div dir="ltr"> </div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Nov 2, 2024 at 5:38 AM Sietse van Zanen <<a href="mailto:sietse@wizdom.nu">sietse@wizdom.nu</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg-4009200173228424518"> <div lang="NL" style="overflow-wrap: break-word;"> <div class="m_-4009200173228424518WordSection1"> I seem to be hitting some very weird corner case causing an assertion failure. The offender is ZFS Event Daemon: The following code shows the offence: struct udev_device *dev; if ((dev = udev_monitor_receive_device(mon)) == NULL) { zed_log_msg(LOG_WARNING, "zed_udev_monitor: receive " "device error %d", errno); continue; } ….. sectors = udev_device_get_property_value(dev, "ID_PART_ENTRY_SIZE"); if (sectors == NULL) sectors = udev_device_get_sysattr_value(dev, "size"); Im at a loss here as to what’s causing the assertion failure. Both udev_device_get_property_value and udev_device_get_sysattr_value only assert a valid udev_device pointer. How can the pointer get lost between these two function calls? -Sietse </div></div></div></blockquote><div> </div><div> you need to poll before any valid udev_device is returned to you.</div></div></div>