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[Bug 1493943] Re: Mono reliably crashes on certain multithreaded code in 3.13.0-62-generic

 

** Description changed:

+ SRU Justification:
+ 
+ [Impact]
  This bug appears to be due to a regression of the fix for:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450584
  
  Specifically, the edit history for
  https://github.com/torvalds/linux/commits/master/arch/x86/kernel/pvclock.c
  (one of the files that the parent mentioned needed patching for the fix)
  shows that the changes added for the fix were removed one month later.
+ 
+ [Fix]
+ $ git describe --contains 73459e2a1ada09a68c02cc5b73f3116fc8194b3d
+ v4.1-rc2~14^2
+ 
+ [Test Case]
+ run mono in a multithreaded kvm vm
+ bug 1450584 has some testcases
+ 
+ --
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-62-generic 3.13.0-62.102
  ProcVersionSignature: Ubuntu 3.13.0-62.102-generic 3.13.11-ckt24
  Uname: Linux 3.13.0-62-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  AudioDevicesInUse:
-  USER        PID ACCESS COMMAND
-  /dev/snd/controlC0:  droffel    1829 F.... pulseaudio
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  droffel    1829 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Sep  9 10:28:21 2015
  HibernationDevice: RESUME=UUID=c916917a-07a8-42ad-807a-b2f7c4ff9807
  InstallationDate: Installed on 2015-04-15 (146 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  IwConfig:
-  eth0      no wireless extensions.
-  
-  lo        no wireless extensions.
+  eth0      no wireless extensions.
+ 
+  lo        no wireless extensions.
  Lsusb:
-  Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
-  Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
+  Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
+  Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: innotek GmbH VirtualBox
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-62-generic root=UUID=51deb493-21fe-4016-9855-90d738549bff ro quiet splash crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7
  RelatedPackageVersions:
-  linux-restricted-modules-3.13.0-62-generic N/A
-  linux-backports-modules-3.13.0-62-generic  N/A
-  linux-firmware                             1.127.15
+  linux-restricted-modules-3.13.0-62-generic N/A
+  linux-backports-modules-3.13.0-62-generic  N/A
+  linux-firmware                             1.127.15
  RfKill:
-  
+ 
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
-  
+ 
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1493943

Title:
  Mono reliably crashes on certain multithreaded code in
  3.13.0-62-generic

Status in linux package in Ubuntu:
  Fix Released
Status in linux-lts-utopic package in Ubuntu:
  Invalid
Status in linux source package in Trusty:
  In Progress
Status in linux-lts-utopic source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress

Bug description:
  SRU Justification:

  [Impact]
  This bug appears to be due to a regression of the fix for:
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450584

  Specifically, the edit history for
  https://github.com/torvalds/linux/commits/master/arch/x86/kernel/pvclock.c
  (one of the files that the parent mentioned needed patching for the
  fix) shows that the changes added for the fix were removed one month
  later.

  [Fix]
  $ git describe --contains 73459e2a1ada09a68c02cc5b73f3116fc8194b3d
  v4.1-rc2~14^2

  [Test Case]
  run mono in a multithreaded kvm vm
  bug 1450584 has some testcases

  --

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-62-generic 3.13.0-62.102
  ProcVersionSignature: Ubuntu 3.13.0-62.102-generic 3.13.11-ckt24
  Uname: Linux 3.13.0-62-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  droffel    1829 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Sep  9 10:28:21 2015
  HibernationDevice: RESUME=UUID=c916917a-07a8-42ad-807a-b2f7c4ff9807
  InstallationDate: Installed on 2015-04-15 (146 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  Lsusb:
   Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
   Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: innotek GmbH VirtualBox
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-62-generic root=UUID=51deb493-21fe-4016-9855-90d738549bff ro quiet splash crashkernel=384M-:128M crashkernel=384M-:128M vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-62-generic N/A
   linux-backports-modules-3.13.0-62-generic  N/A
   linux-firmware                             1.127.15
  RfKill:

  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:

  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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