[asterisk-bugs] [JIRA] (ASTERISK-23769) critical crash in chan_unistim

[Tamás Németh (JIRA)]

Tamás Németh created ASTERISK-23769:
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             Summary: critical crash in chan_unistim
                 Key: ASTERISK-23769
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23769
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_unistim
    Affects Versions: 11.9.0
         Environment: Linux
            Reporter: Tamás Németh
            Severity: Critical


 Sorry I'm not a debugging expert, so the information provided by me might be insufficient.

 I observed that asterisk sometimes crashes upon powering up unistim phones.

 This is what I saw in "asterisk -R" with "unistim set debug on":

Received a packet from an unknown source
Discovery packet received - Sending Discovery ACK
Creating a new entry for the phone from 172.23.60.150 received via server ip 172.23.60.150
Request received
Request received
ResumeConnectionWithServer received
Sending packet_send_query_mac_address
Request received
MAC Address received: 001969845fff
Trying to register extension '703' into context 'belfold' to USTM/703 at 703
asterix*CLI> 
Disconnected from Asterisk server



And this is what I could collect with gdb:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fff9e96c700 (LWP 3793)]
__strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:210
210     ../sysdeps/x86_64/strcmp.S: No such file or directory.
(gdb) backtrace
#0  __strcmp_ssse3 () at ../sysdeps/x86_64/strcmp.S:210
#1  0x0000000000532cb7 in hashtab_compare_extens ()
#2  0x00000000004fa09a in ast_hashtab_lookup ()
#3  0x0000000000545446 in ast_add_extension2_lockopt.constprop.43 ()
#4  0x000000000054aaa1 in ast_add_extension ()
#5  0x00007fffb9d94567 in rcv_mac_addr () from /usr/lib64/asterisk/modules/chan_unistim.so
#6  0x00007fffb9da3792 in parsing () from /usr/lib64/asterisk/modules/chan_unistim.so
#7  0x00007fffb9da531a in unistimsock_read () from /usr/lib64/asterisk/modules/chan_unistim.so
#8  0x00000000005032ca in ast_io_wait ()
#9  0x00007fffb9d9d2ac in do_monitor () from /usr/lib64/asterisk/modules/chan_unistim.so
#10 0x000000000059580a in dummy_start ()
#11 0x00007ffff649e0db in start_thread (arg=0x7fff9e96c700) at pthread_create.c:309
#12 0x00007ffff791290d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
(gdb) quit



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