This bug was fixed in the package linux - 3.13.0-54.91
---------------
linux (3.13.0-54.91) trusty; urgency=medium
[ Luis Henriques ]
* Release Tracking Bug
- LP: #1458618
[ Upstream Kernel Changes ]
* [3.13-stable only] Revert "gianfar: Carefully free skbs in functions
called by netpoll."
- LP: #1454746
linux (3.13.0-54.90) trusty; urgency=low
[ Luis Henriques ]
* Release Tracking Bug
- LP: #1458618
[ Andy Whitcroft ]
* [Config] push off linux-lts-{utopic, vivid}-tools-common
- LP: #1405807
[ Brad Figg ]
* hyper-v -- add hid and fb drivers to linux-virtual
- LP: #1444179
[ Upstream Kernel Changes ]
* DT doc: net: cpsw mac-address is optional
- LP: #1452628
* net: cpsw: Add missing return value
- LP: #1452628
* net: cpsw: header, Add missing include
- LP: #1452628
* net: cpsw: Add am33xx MACID readout
- LP: #1452628
* am33xx: define syscon control module device node
- LP: #1452628
* arm: dts: am33xx, Add syscon phandle to cpsw node
- LP: #1452628
* net: cpsw: do not register cpts twice
- LP: #1452620
* x86: kvm: Revert "remove sched notifier for cross-cpu migrations"
- LP: #1450584
* x86: vdso: fix pvclock races with task migration
- LP: #1450584
* n_tty: Fix read buffer overwrite when no newline
- LP: #1381005, #1454746
* KVM: x86: Fix lost interrupt on irr_pending race
- LP: #1454746
* writeback: add missing INITIAL_JIFFIES init in
global_update_bandwidth()
- LP: #1454746
* nbd: fix possible memory leak
- LP: #1454746
* mfd: kempld-core: Fix callback return value check
- LP: #1454746
* KVM: nVMX: mask unrestricted_guest if disabled on L0
- LP: #1454746
* spi: trigger trace event for message-done before mesg->complete
- LP: #1454746
* powerpc/pseries: Little endian fixes for post mobility device tree
update
- LP: #1454746
* net: ethernet: pcnet32: Setup the SRAM and NOUFLO on Am79C97{3, 5}
- LP: #1454746
* perf: Fix irq_work 'tail' recursion
- LP: #1454746
* arm64: Use the reserved TTBR0 if context switching to the init_mm
- LP: #1454746
* selinux: fix sel_write_enforce broken return value
- LP: #1454746
* mm: fix anon_vma->degree underflow in anon_vma endless growing
prevention
- LP: #1454746
* mm/memory hotplug: postpone the reset of obsolete pgdat
- LP: #1454746
* hfsplus: fix B-tree corruption after insertion at position 0
- LP: #1454746
* ARC: SA_SIGINFO ucontext regs off-by-one
- LP: #1454746
* writeback: fix possible underflow in write bandwidth calculation
- LP: #1454746
* iio: fix drivers that check buffer->scan_mask
- LP: #1454746
* iio: inv_mpu6050: Clear timestamps fifo while resetting hardware fifo
- LP: #1454746
* iio: core: Fix double free.
- LP: #1454746
* USB: ftdi_sio: Added custom PID for Synapse Wireless product
- LP: #1454746
* iwlwifi: dvm: run INIT firmware again upon .start()
- LP: #1454746
* USB: keyspan_pda: add new device id
- LP: #1454746
* cifs: smb2_clone_range() - exit on unhandled error
- LP: #1454746
* cifs: fix use-after-free bug in find_writable_file
- LP: #1454746
* can: flexcan: Deferred on Regulator return EPROBE_DEFER
- LP: #1454746
* usb: xhci: handle Config Error Change (CEC) in xhci driver
- LP: #1454746
* usb: xhci: apply XHCI_AVOID_BEI quirk to all Intel xHCI controllers
- LP: #1454746
* USB: ftdi_sio: Use jtag quirk for SNAP Connect E10
- LP: #1454746
* tty: serial: fsl_lpuart: clear receive flag on FIFO flush
- LP: #1454746
* radeon: Do not directly dereference pointers to BIOS area.
- LP: #1454746
* iio: imu: Use iio_trigger_get for indio_dev->trig assignment
- LP: #1454746
* dmaengine: edma: fix memory leak when terminating running transfers
- LP: #1454746
* dmaengine: omap-dma: Fix memory leak when terminating running transfer
- LP: #1454746
* x86/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk
- LP: #1454746
* mac80211: fix RX A-MPDU session reorder timer deletion
- LP: #1454746
* tcp: prevent fetching dst twice in early demux code
- LP: #1454746
* net: use for_each_netdev_safe() in rtnl_group_changelink()
- LP: #1454746
* xen-netfront: transmit fully GSO-sized packets
- LP: #1454746
* tcp: fix FRTO undo on cumulative ACK of SACKed range
- LP: #1454746
* PCI: cpcihp: Add missing curly braces in cpci_configure_slot()
- LP: #1454746
* sh_veu: v4l2_dev wasn't set
- LP: #1454746
* media: s5p-mfc: fix mmap support for 64bit arch
- LP: #1454746
* cpuidle: ACPI: do not overwrite name and description of C0
- LP: #1454746
* ioctx_alloc(): fix vma (and file) leak on failure
- LP: #1454746
* ALSA: hda/realtek - Make more stable to get pin sense for ALC283
- LP: #1454746
* be2iscsi: Fix kernel panic when device initialization fails
- LP: #1454746
* Defer processing of REQ_PREEMPT requests for blocked devices
- LP: #1454746
* ALSA: hda - Fix headphone pin config for Lifebook T731
- LP: #1454746
* ocfs2: _really_ sync the right range
- LP: #1454746
* ALSA: usb - Creative USB X-Fi Pro SB1095 volume knob support
- LP: #1454746
* iscsi target: fix oops when adding reject pdu
- LP: #1454746
* net/mlx4_en: Call register_netdevice in the proper location
- LP: #1454746
* ipv6: protect skb->sk accesses from recursive dereference inside the
stack
- LP: #1454746
* tcp: tcp_make_synack() should clear skb->tstamp
- LP: #1454746
* 8139cp: Call dev_kfree_skby_any instead of kfree_skb.
- LP: #1454746
* 8139too: Call dev_kfree_skby_any instead of dev_kfree_skb.
- LP: #1454746
* r8169: Call dev_kfree_skby_any instead of dev_kfree_skb.
- LP: #1454746
* bonding: Call dev_kfree_skby_any instead of kfree_skb.
- LP: #1454746
* bnx2: Call dev_kfree_skby_any instead of dev_kfree_skb.
- LP: #1454746
* tg3: Call dev_kfree_skby_any instead of dev_kfree_skb.
- LP: #1454746
* ixgb: Call dev_kfree_skby_any instead of dev_kfree_skb.
- LP: #1454746
* benet: Call dev_kfree_skby_any instead of kfree_skb.
- LP: #1454746
* gianfar: Carefully free skbs in functions called by netpoll.
- LP: #1454746
* ip_forward: Drop frames with attached skb->sk
- LP: #1454746
* tcp: fix possible deadlock in tcp_send_fin()
- LP: #1454746
* tcp: avoid looping in tcp_send_fin()
- LP: #1454746
* net: do not deplete pfmemalloc reserve
- LP: #1454746
* net: fix crash in build_skb()
- LP: #1454746
* ipv4: Missing sk_nulls_node_init() in ping_unhash().
- LP: #1454746
* Linux 3.13.11-ckt20
- LP: #1454746
* of: Add support for ePAPR "stdout-path" property
- LP: #1438585
* lib: add glibc style strchrnul() variant
- LP: #1438585
* of: Create unlocked version of for_each_child_of_node()
- LP: #1438585
* of: Make of_find_node_by_path() handle /aliases
- LP: #1438585
* of: Create of_console_check() for selecting a console specified in
/chosen
- LP: #1438585
* of: Enable console on serial ports specified by /chosen/stdout-path
- LP: #1438585
* of: correct of_console_check()'s return value
- LP: #1438585
* of: Add bindings for chosen node, stdout-path
- LP: #1438585
* of: add optional options parameter to of_find_node_by_path()
- LP: #1438585
* of: support passing console options with stdout-path
- LP: #1438585
* (upstream) net/mlx4_core: Adjust command timeouts to conform to the
firmware spec
- LP: #1455121
* arm64: kernel: add MPIDR_EL1 accessors macros
- LP: #1455372
* of: reimplement the matching method for __of_match_node()
- LP: #1455372
* arm64: remove redundant "psci:" prefixes
- LP: #1455372
* arm64: remove return value form psci_init()
- LP: #1455372
* arm: KVM: Don't return PSCI_INVAL if waitqueue is inactive
- LP: #1455372
* KVM: Add capability to advertise PSCI v0.2 support
- LP: #1455372
* ARM/ARM64: KVM: Add common header for PSCI related defines
- LP: #1455372
* ARM/ARM64: KVM: Add base for PSCI v0.2 emulation
- LP: #1455372
* KVM: Documentation: Add info regarding KVM_ARM_VCPU_PSCI_0_2 feature
- LP: #1455372
* ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible
- LP: #1455372
* KVM: Add KVM_EXIT_SYSTEM_EVENT to user space API header
- LP: #1455372
* ARM/ARM64: KVM: Emulate PSCI v0.2 SYSTEM_OFF and SYSTEM_RESET
- LP: #1455372
* ARM/ARM64: KVM: Emulate PSCI v0.2 AFFINITY_INFO
- LP: #1455372
* ARM/ARM64: KVM: Emulate PSCI v0.2 MIGRATE_INFO_TYPE and related
functions
- LP: #1455372
* ARM/ARM64: KVM: Fix CPU_ON emulation for PSCI v0.2
- LP: #1455372
* ARM/ARM64: KVM: Emulate PSCI v0.2 CPU_SUSPEND
- LP: #1455372
* ARM/ARM64: KVM: Advertise KVM_CAP_ARM_PSCI_0_2 to user space
- LP: #1455372
* PSCI: Add initial support for PSCIv0.2 functions
- LP: #1455372
* Documentation: devicetree: Add new binding for PSCIv0.2
- LP: #1455372
* ARM: Check if a CPU has gone offline
- LP: #1455372
* arm64: KVM: Enable minimalistic support for Cortex-A53
- LP: #1455372
* HID: multitouch: add support of clickpads
- LP: #1456881
* vhost/scsi: potential memory corruption
- LP: #1457807
- CVE-2015-4036
-- Luis Henriques <luis.henriq...@canonical.com> Tue, 26 May 2015
17:19:30 +0100
--
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/1450584
Title:
mono occassionally crashes since kernel 3.13.0-48 on multi-cpu vm
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
Fix Released
Status in linux source package in Utopic:
Fix Released
Status in linux source package in Vivid:
Fix Released
Bug description:
[Impact]
The addition of the commit:
http://kernel.ubuntu.com/git/ubuntu/ubuntu-trusty.git/commit/?id=11f4e0339c8dc8d760483258efd9f15b4c6dcda2
Causes SIGSEGVs when running certain workloads on multi-cpu VMs.
[Test Case]
Mono test case here that causes the SIGSEGV
https://bugzilla.xamarin.com/show_bug.cgi?id=29212
[Fix]
These two commits are required for fixing this issue:
https://github.com/torvalds/linux/commit/80f7fdb1c7f0f9266421f823964fd1962681f6ce
https://github.com/torvalds/linux/commit/0a4e6be9ca17c54817cf814b4b5aa60478c6df27
--
Gradually since late March more and more users started to complain
about frequent SIGSEGV crashes in our .net/mono application. Early
April I started to investigate it actively.
After eliminating possible native libraries, and testing various mono
versions I discovered the crashes would occur more frequently on a
vbox vm with multiple cpus configured. And discovered that the mono
bug-18026.cs testcase would fairly consistently crash. At that point
it was reported to the mono bug tracker.
I finally got a break when we found a correlation with the kernel version.
3.13.0-46 didn't crash while 3.13.0-48,49 did.
More and more users upgrade to these newer kernel versions and start running
into issues, which explains the gradual increase in reports.
Early this week I performed a full git bisect on the kernel between 3.13.0-46
and -48 and isolated the commit that seems to trigger the crashes.
Namely
http://kernel.ubuntu.com/git/ubuntu/ubuntu-trusty.git/commit/?id=11f4e0339c8dc8d760483258efd9f15b4c6dcda2
At this point I don't know if the commit messed up something, or that mono
simply handles it incorrectly. However, a few commits for linux 4.x seem to fix
it:
https://github.com/torvalds/linux/commit/80f7fdb1c7f0f9266421f823964fd1962681f6ce
https://github.com/torvalds/linux/commit/0a4e6be9ca17c54817cf814b4b5aa60478c6df27
I applied these commits myself on top of commit 11f4e033, compiled and ran
the testcase... didn't crash in the 200x test runs I did.
Although I don't know if those two patches have unknown side-effects.
I'm not an expert on the kernel, not even remotely. But I thought it would be
nice to be able to point at a possible solution.
My current test vm is a virtualbox vm 64bit installed using the 14.04.2
server iso running on an older i7 quad core Windows 7 64bit host.
In the vm I've tested numerous mono and kernel combinations. Last test was
with kernel 3.16.0-36 and 3.13.0-51 and mono 4.0.1, in which the problem still
occurs.
By now I've debugged the app using gdb several dozen times on various
user setups, compiled mono half a dozen times, and then the 8x3h
compile kernel bisect :) Speaking of down the rabbit-hole...
So I'm pretty desperate for some expert to help me out here. :D
Reference to mono bug report:
https://bugzilla.xamarin.com/show_bug.cgi?id=29212
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-51-generic 3.13.0-51.84
ProcVersionSignature: Ubuntu 3.13.0-51.84-generic 3.13.11-ckt18
Uname: Linux 3.13.0-51-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Apr 30 18:53 seq
crw-rw---- 1 root audio 116, 33 Apr 30 18:53 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
CurrentDmesg: [ 9.379188] init: plymouth-upstart-bridge main process
ended, respawning
Date: Thu Apr 30 19:45:43 2015
HibernationDevice: RESUME=UUID=b35ef328-166d-4476-a418-e7e80d22cb30
InstallationDate: Installed on 2015-04-22 (7 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64
(20150218.1)
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
ProcEnviron:
TERM=screen
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-51-generic
root=UUID=68da7e09-1a91-4107-859d-bf452f9ed992 ro
RelatedPackageVersions:
linux-restricted-modules-3.13.0-51-generic N/A
linux-backports-modules-3.13.0-51-generic N/A
linux-firmware 1.127.11
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1450584/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
