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Description of problem:
tgtd daemon crasheshes from time to time. We are having workaround for that
which starts it again once it is detected but it sometimes times out after
120s. 

We use tgtd to serve as a target host of about 300 hundreds of lvs from remotely
connected disk array on a machine that has 250GB of ram.

Version-Release number of selected component (if applicable):
scsi-target-utils-1.0.24-16.el6.x86_64
2.6.32-573.8.1.el6.x86_64

How reproducible: randomly about once in a three weeks

Steps to Reproduce:
1. tgtd crashes in normal operation and takes much longer to start then (sometimes over two minutes)

Actual results: random crashes from time to time, longer start time than before 6.7

Expected results: no random crashes, short start time

Created attachment 1123512 [details]
sosreport from abrtd

# from the sosreport
segfault at 1e4fdc0 ip 0000000000409bb0 sp 00007ffdbdae3fc0 error 4 in tgtd[400000+3e000]

# addr2line -e `which tgtd` 409bb0
/usr/src/debug/fujita-tgt-e039354/usr/iscsi/target.c:410

which is a list_for_each_entry_safe loop in iscsi_target_destroy()