[Bug 1934221] [NEW] systemd-resolve segfault

[Denys Fedoryshchenko]

Public bug reported:

systemd-resolve keep crashing and it is very annoying as sometimes it
severely interrupt normal dns resolving.

Last uploaded report is 2d9e7378-d89b-11eb-9e14-fa163ee63de6
Typical error in dmesg: 
systemd-resolve[1792202]: segfault at 564ff982f3e0 ip 0000564ff982f3e0 sp 00007ffe2fd0b758 error 15

apport hints me that problem is related to mdns

#3  0x00007f3e903c2f11 in sd_event_dispatch () from /lib/systemd
/libsystemd-shared-245.so

It might be (or not) related that some hosts with mdns in my network
have ipv6 enabled.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: systemd 245.4-4ubuntu3.7
ProcVersionSignature: Ubuntu 5.4.0-75.84-generic 5.4.119
Uname: Linux 5.4.0-75-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul  1 08:22:51 2021
InstallationDate: Installed on 2018-12-05 (938 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-75-generic root=UUID=54b80d5c-3d61-4919-873f-0d308083e3b9 ro quiet splash vt.handoff=7
SourcePackage: systemd
UpgradeStatus: Upgraded to focal on 2020-05-22 (405 days ago)
dmi.bios.date: 05/12/2020
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1205
dmi.board.asset.tag: Default string
dmi.board.name: ROG STRIX X399-E GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1205:bd05/12/2020:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXX399-EGAMING:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal third-party-packages

** Attachment added: "attaching empty file, otherwise launchpad giving error"
   https://bugs.launchpad.net/bugs/1934221/+attachment/5508334/+files/x

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https://bugs.launchpad.net/bugs/1934221

Title:
  systemd-resolve segfault

Status in systemd package in Ubuntu:
  New

Bug description:
  systemd-resolve keep crashing and it is very annoying as sometimes it
  severely interrupt normal dns resolving.

  Last uploaded report is 2d9e7378-d89b-11eb-9e14-fa163ee63de6
  Typical error in dmesg: 
  systemd-resolve[1792202]: segfault at 564ff982f3e0 ip 0000564ff982f3e0 sp 00007ffe2fd0b758 error 15

  apport hints me that problem is related to mdns

  #3  0x00007f3e903c2f11 in sd_event_dispatch () from /lib/systemd
  /libsystemd-shared-245.so

  It might be (or not) related that some hosts with mdns in my network
  have ipv6 enabled.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.7
  ProcVersionSignature: Ubuntu 5.4.0-75.84-generic 5.4.119
  Uname: Linux 5.4.0-75-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Jul  1 08:22:51 2021
  InstallationDate: Installed on 2018-12-05 (938 days ago)
  InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
  MachineType: System manufacturer System Product Name
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-75-generic root=UUID=54b80d5c-3d61-4919-873f-0d308083e3b9 ro quiet splash vt.handoff=7
  SourcePackage: systemd
  UpgradeStatus: Upgraded to focal on 2020-05-22 (405 days ago)
  dmi.bios.date: 05/12/2020
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1205
  dmi.board.asset.tag: Default string
  dmi.board.name: ROG STRIX X399-E GAMING
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Default string
  dmi.chassis.type: 3
  dmi.chassis.vendor: Default string
  dmi.chassis.version: Default string
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1205:bd05/12/2020:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGSTRIXX399-EGAMING:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: System Product Name
  dmi.product.sku: SKU
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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