Here’s a valgrlind log showing many invalid writes to freed addresses in cb_data_free → curl_multi_remove_handle and nm_connectivity_check_start → curl_multi_add_handle, which could explain the heap corruption.
** Attachment added: "nm.19802.log" https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1792745/+attachment/5189363/+files/nm.19802.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1792745 Title: NetworkManager crashed with SIGSEGV in _int_malloc() Status in network-manager package in Ubuntu: New Bug description: I’m seeing NetworkManager crash several times on startup and on resume from suspend. Apport doesn’t catch those for some reason, but this happened when I tried to reproduce by manually running NetworkManager --debug. (Different crash from bug 1792743? Also apport-retrace didn’t seem to like that one.) ProblemType: Crash DistroRelease: Ubuntu 18.10 Package: network-manager 1.12.2-0ubuntu4 ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5 Uname: Linux 4.18.0-7-generic x86_64 NonfreeKernelModules: openafs ApportVersion: 2.20.10-0ubuntu9 Architecture: amd64 Date: Sat Sep 15 14:04:50 2018 EcryptfsInUse: Yes ExecutablePath: /usr/sbin/NetworkManager IfupdownConfig: # ifupdown has been replaced by netplan(5) on this system. Do not edit. InstallationDate: Installed on 2016-02-19 (939 days ago) InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160218) NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=false ProcCmdline: NetworkManager --debug SegvAnalysis: Segfault happened at: 0x7f79966ea378 <_int_malloc+3352>: cmp %rcx,0x18(%rdx) PC (0x7f79966ea378) ok source "%rcx" ok destination "0x18(%rdx)" (0x00000018) not located in a known VMA region (needed writable region)! SegvReason: writing NULL VMA Signal: 11 SourcePackage: network-manager StacktraceTop: _int_malloc (av=av@entry=0x7f799683ac40 <main_arena>, bytes=bytes@entry=4096) at malloc.c:4014 __libc_calloc (n=<optimized out>, elem_size=<optimized out>) at malloc.c:3420 g_malloc0 () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 nlmsg_alloc_size (len=4096) at src/platform/nm-netlink.c:314 _nl80211_alloc_msg (id=28, ifindex=2, phy=0, cmd=cmd@entry=32, flags=flags@entry=768) at src/platform/wifi/wifi-utils-nl80211.c:88 Title: NetworkManager crashed with SIGSEGV in _int_malloc() UpgradeStatus: Upgraded to cosmic on 2018-08-17 (29 days ago) UserGroups: nmcli-con: Error: command ['nmcli', '-f', 'all', 'con'] failed with exit code 8: Error: NetworkManager is not running. nmcli-dev: Error: command ['nmcli', '-f', 'all', 'dev'] failed with exit code 8: Error: NetworkManager is not running. nmcli-nm: Error: command ['nmcli', '-f', 'all', 'gen'] failed with exit code 8: Error: NetworkManager is not running. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1792745/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
