Segmentation fault is seen upon resizing the storage size

[mittachaitu]

Description

Upon modifying the LUN0 Storage in istgt.conf file, to reload modified configuration executed istgtcontrol refresh then segmentation fault is seen.

Expected Behavior

istgt should not crash

Steps to Reproduce

• Run the istgt binary.
• Modify the value of storage in /usr/local/etc/istgt/istgt.conf file
• Execute the istgtcontrol refresh command to reload the configurations.

Logs of istgt
2019-02-11/12:13:40.023 main :3089: m#-1747536064.6923 : istgt:0.5.20121028:09:27:44:Feb 7 2019: starting

2019-02-11/12:13:40.023 main :3146: m#-1747536064.6923 : LU2 HDD UNIT
2019-02-11/12:13:40.024 istgt_lu_disk_init: 904: m#-1747536064.6923 : lu_disk_init LU2 TargetName=iqn.2016-09.com.openebs.cstor:vol1
LU2: LUN0 iqn.2016-09.com.openebs.cstor:vol1: storage_online [(null), 4GB.0MB, 1048576 blks of 4096 bytes, phy:0/3 WCE rpm:7200] q:128 thr:6/0 [0.0, 0.0]
LU2: LUN0 serial:4059aab98f093c5d95207f7af09d1413
2019-02-11/12:13:40.024 istgt_lu_disk_init:1337: m#-1747536064.6923 : LU2: LUN0 serial:4059aab98f093c5d95207f7af09d1413
2019-02-11/12:13:52.055 istgt_reload :2141: u#10.140606617675520: reload configuration#1 start

[istgt:0.5.20121028:09:27:44:Feb 7 2019]
2019-02-11/12:13:52.056 istgt_lu_disk_shut:1432: u#10.140606617675520: LU2: LUN0 iqn.2016-09.com.openebs.cstor:vol1: storage_offlinex [(null) 1048576 blocks, 4096 bytes/block] [0.0 0.0 0.0]

LU2 HDD UNIT
2019-02-11/12:13:52.056 istgt_lu_disk_init: 904: u#10.140606617675520: lu_disk_init LU2 TargetName=iqn.2016-09.com.openebs.cstor:vol1
LU2: LUN0 iqn.2016-09.com.openebs.cstor:vol1: storage_online [(null), 5GB.0MB, 1310720 blks of 4096 bytes, phy:0/3 WCE rpm:7200] q:128 thr:6/0 [0.0, 0.0]
2019-02-11/12:13:52.057 istgt_lu_disk_init:1327: u#10.140606617675520: LU2: LUN0 iqn.2016-09.com.openebs.cstor:vol1: storage_online [(null), 5GB.0MB, 1310720 blks of 4096 bytes, phy:0/3 WCE rpm:7200] q:128 thr:6/0 [0.0, 0.0]
LU2: LUN0 serial:4059aab98f093c5d95207f7af09d1413
2019-02-11/12:13:52.057 istgt_lu_disk_init:1337: u#10.140606617675520: LU2: LUN0 serial:4059aab98f093c5d95207f7af09d1413
2019-02-11/12:13:52.057 istgt_lu_reload_up:3325: u#10.140606617675520: update LU2: Name=iqn.2016-09.com.openebs.cstor:vol1
Fatal signal received: 11
Stack trace:
./istgt[0x40bd10]
/lib/x86_64-linux-gnu/libc.so.6(+0x354b0)[0x7fe196c5b4b0]
./istgt[0x5a236c]
./istgt[0x5a367d]
./istgt[0x5936d1]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ba)[0x7fe19750b6ba]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7fe196d2d41d]
Segmentation fault (core dumped)