Public bug reported:
I have a block device exported from zfs, and from time to time it drops
off the network, after which operations such as targetctl restore will
hang.
When it hangs it is stuck in core_tpg_del_initiator_node_acl:
```
[<0>] core_tpg_del_initiator_node_acl+0x8e/0x120 [target_core_mod]
[<0>] target_fabric_nacl_base_release+0x26/0x30 [target_core_mod]
[<0>] config_item_release+0x5d/0xd0
[<0>] config_item_put+0x27/0x30
[<0>] configfs_rmdir+0x1c5/0x300
[<0>] vfs_rmdir+0x86/0x1a0
[<0>] do_rmdir+0x18c/0x1c0
[<0>] __x64_sys_rmdir+0x17/0x20
[<0>] do_syscall_64+0x57/0x190
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
```
I can see there have been many similar bugs over the years...
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: targetcli-fb 1:2.1.51-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat Nov 14 08:13:12 2020
InstallationDate: Installed on 2013-12-09 (2531 days ago)
InstallationMedia: Ubuntu-Server 13.10 "Saucy Salamander" - Release amd64
(20131016)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_NZ:en
TERM=screen
PATH=(custom, no user)
LANG=en_NZ.UTF-8
SHELL=/bin/bash
SourcePackage: targetcli-fb
UpgradeStatus: Upgraded to focal on 2020-05-21 (176 days ago)
** Affects: targetcli-fb (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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https://bugs.launchpad.net/bugs/1904235
Title:
targetctl hanging
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