- **status**: accepted --> review
- **Type**: enhancement --> defect
---
** [tickets:#1246] mds: sending a bigger message causing mds application
segfault if task/thread created Medium/less stack size**
**Status:** review
**Milestone:** 4.6.FC
**Created:** Tue Jan 27, 2015 04:26 AM UTC by A V Mahesh (AVM)
**Last Updated:** Tue Feb 10, 2015 04:08 AM UTC
**Owner:** A V Mahesh (AVM)
If MDS application task is created with task/thread created Medium/less stack
size say 32000
and try to send hugae message say above 2^16 size message (65536) , because
of static allocation of
message application is running out of stack and misbehaving
(gdb) bt
#0 0x00007ffff6bd24fb in memcpy () from /lib64/libc.so.6
#1 0x00007ffff750c53d in sysf_data_at_start_v () from
/usr/local/lib/libopensaf_core.so.0
#2 0x00007ffff75433ff in mds_mdtm_send_tipc () from
/usr/local/lib/libopensaf_core.so.0
#3 0x00007ffff752fbf2 in mcm_msg_encode_full_or_flat_and_send () at
mds_c_sndrcv.c:1537
#4 0x00007ffff7531d27 in mds_mcm_send_msg_enc.constprop.37 () at
mds_c_sndrcv.c:1093
#5 0x00007ffff7532728 in mcm_pvt_red_snd_process_common () at
mds_c_sndrcv.c:2304
#6 0x00007ffff7535e57 in mds_send () at mds_c_sndrcv.c:3179
#7 0x00007ffff752eca8 in ncsmds_api () from /usr/local/lib/libopensaf_core.so.0
#8 0x0000000000420e84 in mds_send_response ()
#9 0x0000000000409c9b in tet_adest_rcvr_thread () at mdstipc_api.c:5055
#10 0x00007ffff72d77b6 in start_thread () from /lib64/libpthread.so.0
#11 0x00007ffff6c269cd in clone () from /lib64/libc.so.6
#12 0x0000000000000000 in ?? ()
Solution : solution is replace MDS code static array's with malloc() to
avoid stack corruption
Workaround : increases stack size application if your mds application is
choose to send huge messages
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