Thanks for the bug report. Patch has now been reverted:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=1ef8185a0613dd2ed2
** Changed in: qemu
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1744654
Title:
commit: 4fe6d78 "virtio: postpone the execution of
event_notifier_cleanup function" will cause vhost-user device crash
Status in QEMU:
Fix Released
Bug description:
The new commit: 4fe6d78 break the existing vhost-user devices, such as
vhost-user-scsi/blk and vhost-vsocks when exit the host driver,
kvm_io_ioeventfd_del will hit the abort().
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