One thing that is important to know is that it will not happen on a system that does not use multipath. On the latest kernel, one workaround is to flush the multipath tables before logging out the iscsi nodes :
$ sudo invoke-rc.d multipath-tools stop $ sudo multipath -F $ sudo iscsiadm -m node --logout
This will work and avoid hanging the kernel.
I'm now proceeding to bisect between those two kernel versions
One thing that is important to know is that it will not happen on a system that does not use multipath. On the latest kernel, one workaround is to flush the multipath tables before logging out the iscsi nodes :
$ sudo invoke-rc.d multipath-tools stop
$ sudo multipath -F
$ sudo iscsiadm -m node --logout
This will work and avoid hanging the kernel.
I'm now proceeding to bisect between those two kernel versions