crash in agent_check_and_process

Hi, we use snmp 5.7.3, using V3, authProtocol  SHA,  privProtocol  AES.

Sometimes the agent will be crash, the stack as flow.

Where there has some idea about it?  Thanks a lot.


#0  0x0000ffffafac7168 in __GI_raise (sig=sig@entry=6)
    at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x0000ffffafac855c in __GI_abort () at abort.c:89
#2  0x0000ffffafafe178 in __libc_message (do_abort=do_abort@entry=2, 
    fmt=fmt@entry=0xffffafbac7f0 "*** Error in `%s': %s: 0x%s ***\n")
    at ../sysdeps/posix/libc_fatal.c:175
#3  0x0000ffffafb03cf8 in malloc_printerr (action=3, 
    str=0xffffafbac8f8 "double free or corruption (out)", 
    ptr=<optimized out>, ar_ptr=<optimized out>) at malloc.c:5004
#4  0x0000ffffafb04568 in _int_free (av=0xffffafbd49a0 <main_arena>, 
    p=0xffff90007e30, have_lock=0) at malloc.c:3865
#5  0x0000ffffafdbb6b8 in snmp_free_pdu ()
   from /ptnapp/Active/lib/libnetsnmp.so.30
#6  0x0000ffffafdbebe4 in snmp_sess_timeout ()
   from /ptnapp/Active/lib/libnetsnmp.so.30
#7  0x0000ffffafdbe318 in snmp_timeout ()
   from /ptnapp/Active/lib/libnetsnmp.so.30
#8  0x0000ffffafebb63c in agent_check_and_process ()
   from /ptnapp/Active/lib/libnetsnmpagent.so.30


br.
kaigeny