Hello Matthew, or anyone else affected, Accepted net-snmp into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/net- snmp/5.8+dfsg-2ubuntu2.5 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-focal. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. -- You received this bug notification because you are a member of STS Sponsors, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/1979933 Title: snmptrapd Segmentation Faults When Calling my_load_defaults() Status in net-snmp package in Ubuntu: Fix Released Status in net-snmp source package in Focal: Fix Committed Bug description: [Impact] When starting snmptrapd configured to connect to a mysql server, we segmentation fault when calling my_load_defaults(): $ sudo /usr/sbin/snmptrapd -LOw -f Segmentation fault (core dumped) (gdb) bt #0 0x00007efd8d9f15b0 in MEM_ROOT::Alloc (length=56, this=this@entry=0x0) at ./include/my_alloc.h:157 #1 init_default_directories (alloc=alloc@entry=0x0) at ./mysys/my_default.cc:1632 #2 0x00007efd8d9f817a in my_load_defaults (conf_file=0x7efd8e751f64 "my", groups=0x7efd8e7550c8, argc=0x7ffd8941b674, argv=0x7ffd8941b678, alloc=0x0, default_directories=0x555a8abccc00) at ./mysys/my_default.cc:692 #3 0x00007efd8e74fe1b in netsnmp_mysql_init () from /lib/x86_64-linux-gnu/libnetsnmptrapd.so.35 #4 0x0000555a8a9e3873 in main (argc=<optimized out>, argv=<optimized out>) at snmptrapd.c:1196 What happens is that we are calling my_load_defaults() even though we have mysql_options(), and the arguments we pass into my_load_defaults() are NULL, which eventually get de-referenced. The fix is to change the configure script to only call my_load_defaults() if we don't have mysql_options(). [Testcase] $ sudo apt update $ sudo apt install snmp snmpd snmptrapd snmp-mibs-downloader Edit /etc/snmp/snmptrapd.conf and add the following entries: disableAuthorization yes traphandle default /usr/bin/logger sqlMaxQueue 1 sqlSaveInterval 9 Save and exit. It is easier to reproduce if you stop and disable all services: $ sudo systemctl stop snmptrapd.service $ sudo systemctl stop snmpd.service Then try running: $ sudo /usr/sbin/snmptrapd -LOw -f Segmentation fault (core dumped) There is a test package available in the following ppa: https://launchpad.net/~mruffell/+archive/ubuntu/sf339433-test When running this test package, you will instead see: $ sudo /usr/sbin/snmptrapd -LOw -f mysql_real_connect() failed Error 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) (I don't have a mysql server configured, but we don't segfault anymore). [Where problems can occur] We are changing how snmptrapd initialises and begins connections to a mysql server, and if a regression were to occur, it would be limited to users of snmptrapd with the mysql backend. Other database backends would not be affected. Other binaries produced would also not be affected. [Other Info] The issue was fixed upstream by the following commit: commit 011342d8e453b9e0585bf77f659d80c648df8c9f Author: Bart Van Assche <[email protected]> Date: Sat Aug 18 09:28:14 2018 -0700 Subject: snmptrapd: Let configure check for mysql_options() Link: https://github.com/net-snmp/net-snmp/commit/011342d8e453b9e0585bf77f659d80c648df8c9f To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1979933/+subscriptions -- Mailing list: https://launchpad.net/~sts-sponsors Post to : [email protected] Unsubscribe : https://launchpad.net/~sts-sponsors More help : https://help.launchpad.net/ListHelp
