AddressSanitizer: attempting free on address which was not malloc()-ed

Hi All,

I am using the *snmp_synch_response()* api to sync with response whenever I
create a SNMP_INFORM pdu .
Whenever I call the api snmp_synch response ,I get an address Sanitizer
issue.
I am attaching the code snippet & stack trace of the address Sanitizer.
Can someone help me on this 😞?

-Himanshu



*netsnmp_session session , *ss = NULL;netsnmp_pdu *   pdu = NULL, *response
= NULL;*

*snmp_sess_init(&session);*

*pdu = snmp_pdu_create(SNMP_MSG_INFORM);*
*// fill up all session & pdu structure as required*
session.timeout = 100;
session.retries = 5;

*snmp_synch_response(ss, pdu, &response);*

///Address Sanitizer error prints

==1513==ERROR: AddressSanitizer: attempting free on address which was not
malloc()-ed: 0xb22fbac0 in thread T20 (Interpreter9104)

    #0 0xb72e8eac in free (/usr/lib/libasan.so.4+0xdfeac)


    #1 0x9c94b0db in snmp_free_pdu (/usr/lib/libnetsnmp.so.35+0x4e7030db)


    #2 0x9c94ca1e in snmp_sess_timeout
(/usr/lib/libnetsnmp.so.35+0x4e704a1e)


    #3 0x9c94cad8 in snmp_timeout (/usr/lib/libnetsnmp.so.35+0x4e704ad8)


    #4 0x9c940975 in snmp_synch_response_cb
(/usr/lib/libnetsnmp.so.35+0x4e6f8975)


    #5 0x9c940b06 in snmp_synch_response
(/usr/lib/libnetsnmp.so.35+0x4e6f8b06)


SUMMARY: AddressSanitizer: bad-free (/usr/lib/libasan.so.4+0xdfeac) in free


==1513==ABORTING

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