iscsitarget-dkms broken in Debian Wheezy

Now that was disappointing. An aging iSCSI bug has resurfaced in Debian's latest and greatest stable release, Wheezy, or in numbers 7. Its rendering Debian's iSCSI package useless. Upon scanning a Debian target using an initiator, e.g. ESXi's software iSCSI adaptor, the following messages pop up:

Jun  3 04:30:44 debian kernel: [  242.785518] Pid: 3006, comm: istiod1 Tainted: G           O 3.2.0-4-amd64 #1 Debian 3.2.41-2+deb7u2
Jun  3 04:30:44 debian kernel: [  242.785521] Call Trace:
Jun  3 04:30:44 debian kernel: [  242.785537]  [<ffffffffa03103f1>] ? send_data_rsp+0x45/0x1f4 [iscsi_trgt]
Jun  3 04:30:44 debian kernel: [  242.785542]  [<ffffffffa03190d3>] ? ua_pending+0x19/0xa5 [iscsi_trgt]
Jun  3 04:30:44 debian kernel: [  242.785550]  [<ffffffffa0317da8>] ? disk_execute_cmnd+0x1cf/0x22d [iscsi_trgt]
[...]

With ESXi in particular eventually the lun will show up, after a bunch of timeouts, I suppose, but is not usable in any way and may disconnect at any time.

Solution:

Thankfully there is a solution to the dilemma. Some Googleing around I found this again rather old thread in a Ubuntu forum describing the very same issue. Combined with the knowledge of the aforementioned bug I followed the instructions, grabbed the latest set of iscsitarget-dkms sources, compiled them and whatdoyouknow, it works like a charm.