snmpusm.c:562:27: runtime error: null pointer passed as argument 1, which is declared to never be null

[moshekaplan]

snmpusm.c:562:27: runtime error: null pointer passed as argument 1, which is declared to never be null
/usr/include/string.h:408:33: note: nonnull attribute specified here
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior snmpusm.c:562:27 in 
AddressSanitizer:DEADLYSIGNAL
=================================================================
==207555==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7fc49237401d bp 0x7fff2dd1dc10 sp 0x7fff2dd1d3c8 T0)
==207555==The signal is caused by a READ memory access.
==207555==Hint: address points to the zero page.
    #0 0x7fc49237401d in __strlen_avx2 string/../sysdeps/x86_64/multiarch/strlen-avx2.S:76
    #1 0x55c365f59829 in __interceptor_strlen (/home/user/Desktop/net-snmp/agent/.libs/snmpd+0x3d829) (BuildId: 805b58d3d7b3884d608aeb92ae1f51dd03baf716)
    #2 0x7fc493439127 in usm_add_user_to_list /home/user/Desktop/net-snmp/snmplib/snmpusm.c:562:20
    #3 0x7fc493439127 in usm_add_user /home/user/Desktop/net-snmp/snmplib/snmpusm.c:645:12
    #4 0x7fc49348a089 in usm_parse_config_usmUser /home/user/Desktop/net-snmp/snmplib/snmpusm.c:4357:9
    #5 0x7fc4931b4dd2 in run_config_handler /home/user/Desktop/net-snmp/snmplib/read_config.c:565:23
    #6 0x7fc4931aed81 in read_config /home/user/Desktop/net-snmp/snmplib/read_config.c:990:17
    #7 0x7fc4931bd15e in read_configs_optional /home/user/Desktop/net-snmp/snmplib/read_config.c:1048:18
    #8 0x7fc4931bdbdd in read_configs /home/user/Desktop/net-snmp/snmplib/read_config.c:1079:15
    #9 0x55c366008294 in main /home/user/Desktop/net-snmp/agent/snmpd.c:909:5
    #10 0x7fc492223a8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
    #11 0x7fc492223b48 in __libc_start_main csu/../csu/libc-start.c:360:3
    #12 0x55c365f427b4 in _start (/home/user/Desktop/net-snmp/agent/.libs/snmpd+0x267b4) (BuildId: 805b58d3d7b3884d608aeb92ae1f51dd03baf

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV string/../sysdeps/x86_64/multiarch/strlen-avx2.S:76 in __strlen_avx2
==207555==ABORTING

Triggering file:
fuzz_input.conf.txt
716)

[moshekaplan]

snmpusm.c's lines 541 and 542 state:

    /* XXX - how to handle a NULL user->name ?? */
    /* XXX - similarly for a NULL nptr->name ?? */

This is exactly the issue: nptr->name is NULL here

[moshekaplan]

Seems to have been fixed by #735 , closing.