The SDWAN device is getting crashed whenever ping command is executed from SDWAN GUI and generates a core dump


[hariharana@sjanalysis-1 /upload/ftp/78474183/MCNSTSwithCoredump2ndNov201813.50PM/vw_sts_dir/coredump_2018-11-02.13.42.22]$ 

Thread 44 (Thread 0x7ffb65fd3700 (LWP 27556)): 

#0 0x00007ffff58a4e5d in nanosleep () at ../sysdeps/unix/syscall-template.S:82 
#1 0x00007ffff58a4cd0 in __sleep (seconds=<optimized out>, seconds@entry=1) at ../sysdeps/unix/sysv/linux/sleep.c:138 
#2 0x00000000008de40c in tell_monitor_about_signal () at common/diagnostics.c:194 
#3 0x00000000008def96 in talari_signal_handler (cause=<optimized out>, HowCome=<optimized out>, uap=<optimized out>) at common/diagnostics.c:255 
#4 <signal handler called> 
#5 0x000000000055875d in process_for_local (packet=0x7fffbc98d680) at forward/interfaces/interfaces.c:5158 
#6 0x0000000000568676 in do_ip_forwarding (now_uS=8733391793944, local_queues=0x0, route_data=0x7ffb65fd1920, packet=0x7fffbc98d680) at forward/interfaces/interfaces.c:5867 
#7 do_ip_forwarding (packet=packet@entry=0x7fffbc98d680, route_data=route_data@entry=0x7ffb65fd1920, local_queues=local_queues@entry=0x0, now_uS=now_uS@entry=8733391793944) at forward/inte 
rfaces/interfaces.c:5761 
#8 0x000000000065b1b1 in connection_process_ip_host_packet_after_key_adjust_for_frag (packet=0x7fffbc98d680, now_uS=8733391793944) at forward/firewall/connection.c:916 
#9 0x000000000065b4c5 in dpi_process_packet (packet=packet@entry=0x7fffbc98d680, now_uS=now_uS@entry=8733391793944) at forward/firewall/connection.c:994 
#10 0x000000000059720a in dpi_worker_thread (thread_index=<optimized out>) at forward/interfaces/dpi_interface.c:1107 
#11 0x0000000000875f7b in thread_dispatcher (thread_args=0x67944538) at common/thread_manager.c:465 
#12 0x00007ffff7bc7b50 in start_thread (arg=<optimized out>) at pthread_create.c:304 
#13 0x00007ffff58d4fbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 
#14 0x0000000000000000 in ?? () 

- The issue has got fixed in 10.0.4, 10.0.5 and later versions.

---

Problem Cause

Its a known issue in 10.0.3 as stated below in the 10.0.4 release notes

https://www.citrix.com/content/dam/citrix/en_us/documents/downloads/netscaler-sd-wan/NetScaler-SD-WAN-10.0.4-Release-Notes.pdf 

SDWANHELP-490 (SR# 78276130): A core dump error occurs when an ICMP echo packet that creates a new firewall connection causes the packet to offload from the IP host thread to the DPI threads.