[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Casper]

Has this bug been fixed in Ubuntu 18.04?
I seem to have the same issue (kernel 4.15.0-34).

I do not have any SMB drives mounted, yet old connections from several
months ago are open and still flooding 445:

> sudo netstat -tnp | grep 445
tcp0  0 x.x.x.x:54508a.a.a.a:445 ESTABLISHED -
tcp0  0 x.x.x.x:60350b.b.b.b:445 ESTABLISHED -
tcp0  0 x.x.x.x:56534c.c.c.c:445 ESTABLISHED -

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Marat Khalili]

Hello, is it going to appear in 4.4? I'm getting tired of running
4.4.0-66 (jk works ok but still would prefer to update).

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Eric Twose]

(A couple of other boxes with 16.04 (not 16.04.1) xenial have 4.4.0-81
as latest).

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Eric Twose]

Hi, it may have been fixed in 16.10 yakkety 4.8.0-58.63, but 16.04.1
xenial (LTS) still has 4.8.0-56 as latest on one of my boxes, as
woldemar and Andrij Abyzov report above.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Released
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Launchpad Bug Tracker]

This bug was fixed in the package linux - 4.8.0-58.63

---
linux (4.8.0-58.63) yakkety; urgency=low

  * linux: 4.8.0-58.63 -proposed tracker (LP: #1700533)

  * CVE-2017-1000364
- Revert "UBUNTU: SAUCE: mm: Only expand stack if guard area is hit"
- Revert "mm: do not collapse stack gap into THP"
- Revert "mm: enlarge stack guard gap"
- mm: vma_adjust: remove superfluous confusing update in remove_next == 1 
case
- mm: larger stack guard gap, between vmas
- mm: fix new crash in unmapped_area_topdown()
- Allow stack to grow up to address space limit

linux (4.8.0-57.62) yakkety; urgency=low

  * linux: 4.8.0-57.62 -proposed tracker (LP: #1699035)

  * CVE-2017-1000364
- SAUCE: mm: Only expand stack if guard area is hit

  * CVE-2017-7374
- fscrypt: remove broken support for detecting keyring key revocation

  * CVE-2017-100363
- char: lp: fix possible integer overflow in lp_setup()

  * CVE-2017-9242
- ipv6: fix out of bound writes in __ip6_append_data()

  * CVE-2017-9075
- sctp: do not inherit ipv6_{mc|ac|fl}_list from parent

  * CVE-2017-9074
- ipv6: Prevent overrun when parsing v6 header options

  * CVE-2017-9076
- ipv6/dccp: do not inherit ipv6_mc_list from parent

  * CVE-2017-9077
- ipv6/dccp: do not inherit ipv6_mc_list from parent

  * CVE-2017-8890
- dccp/tcp: do not inherit mc_list from parent

  * extend-diff-ignore should use exact matches (LP: #1693504)
- [Packaging] exact extend-diff-ignore matches

  * APST quirk needed for Intel NVMe (LP: #1686592)
- nvme: Quirk APST on Intel 600P/P3100 devices

  * regression: the 4.8 hwe kernel does not create the
/sys/block/*/device/enclosure_device:* symlinks (LP: #1691899)
- scsi: ses: Fix SAS device detection in enclosure

  * datapath: Add missing case OVS_TUNNEL_KEY_ATTR_PAD (LP: #1676679)
- openvswitch: Add missing case OVS_TUNNEL_KEY_ATTR_PAD

  * connection flood to port 445 on mounting cifs volume under kernel
(LP: #1686099)
- cifs: Do not send echoes before Negotiate is complete

  * Support IPMI system interface on Cavium ThunderX (LP: #1688132)
- i2c: octeon: Rename driver to prepare for split
- i2c: octeon: Split the driver into two parts
- [Config] CONFIG_I2C_THUNDERX=m
- i2c: thunderx: Add i2c driver for ThunderX SOC
- i2c: thunderx: Add SMBUS alert support
- i2c: octeon,thunderx: Move register offsets to struct
- i2c: octeon: Sort include files alphabetically
- i2c: octeon: Use booleon values for booleon variables
- i2c: octeon: thunderx: Add MAINTAINERS entry
- i2c: octeon: Fix set SCL recovery function
- i2c: octeon: Avoid sending STOP during recovery
- i2c: octeon: Fix high-level controller status check
- i2c: octeon: thunderx: TWSI software reset in recovery
- i2c: octeon: thunderx: Remove double-check after interrupt
- i2c: octeon: thunderx: Limit register access retries
- i2c: thunderx: Enable HWMON class probing

  * CVE-2017-5577
- drm/vc4: Return -EINVAL on the overflow checks failing.

  * Merlin SGMII fail on Ubuntu Xenial HWE kernel (LP: #1686305)
- net: phy: marvell: fix Marvell 88E1512 used in SGMII mode
- drivers: net: phy: xgene: Fix mdio write

  * Keyboard backlight control does not work on some dell laptops.
(LP: #1693126)
- platform/x86: dell-laptop: Add Latitude 7480 and others to the DMI 
whitelist
- platform/x86: dell-laptop: Add keyboard backlight timeout AC settings

  * exec'ing a setuid binary from a threaded program sometimes fails to setuid
(LP: #1672819)
- SAUCE: exec: ensure file system accounting in check_unsafe_exec is correct

  * CVE-2017-7294
- drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl()

 -- Stefan Bader   Mon, 26 Jun 2017 17:31:13
+0200

** Changed in: linux (Ubuntu Yakkety)
   Status: Fix Committed => Fix Released

** CVE added: https://cve.mitre.org/cgi-
bin/cvename.cgi?name=2017-1000364

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-100363

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5577

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-7294

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-7374

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-8890

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-9074

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-9075

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-9076

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-9077

** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-9242

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in 

[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Andrij Abyzov]

I also confirm that the issue is here with
4.8.0-56-generic #61~16.04.1-Ubuntu

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1686099/+subscriptions

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[woldemar]

when the problem will be solved in a stable kernel ?

4.8.0-56-generic #61~16.04.1-Ubuntu SMP
The bug is still there

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Janosch Machowinski]

Uhm, sorry too late in the evening...
What I wanted to say is: I tried the proposed kernel (4.8.0-55-generic 
#58~16.04.1-Ubuntu)
the whole day long, and NO connection spam appeared. This means the fix seems 
to work.
As I don't know how to set the tag, or have insufficient rights, please modify 
the tag
to verification-done-yakkety.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[MichaelB]

Is ok for me, 4.8.0-55-generic #58~16.04.1-Ubuntu SMP
No more flood with this kernel version.

** Tags removed: verification-needed-yakkety
** Tags added: verification-done-yakkety

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Janosch Machowinski]

Had 4.8.0-55-generic #58~16.04.1-Ubuntu the whole day, now connection
spam appeared.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Kleber Sacilotto de Souza]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
yakkety' to 'verification-done-yakkety'. If the problem still exists,
change the tag 'verification-needed-yakkety' to 'verification-failed-
yakkety'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-yakkety

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Juerg Haefliger]

** Changed in: linux (Ubuntu Yakkety)
   Status: In Progress => Fix Committed

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Joseph Salisbury]

** Changed in: linux (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Janosch Machowinski]

Hi, 
I also ran the kernel for the past three days, and no
connection spam appeared.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[MichaelB]

@Joseph Salisbury (jsalisbury)

I installed your patched kernel on my Desktop today and it run now from
3 hours without problem, no more cifs flood.. :)

So, i will continue my test today, but apparently this bug is fixed in
your patched kernel.

If is confirmed, can you tell me approximatively when this kernel will
appear in the main ubuntu repository? (4.4, 4.8, 4.10)

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Joseph Salisbury]

I built a Yakkety test kernel with a cherry pick of commit 62a6cfddcc.
The test kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1686099/

Before I SRU this commit to Yakkety, can folks affected by this bug test
this kernel?

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Joseph Salisbury]

@MichaelB, The commit is in Xenial master-next.  It has not been tagged
for a specific version.  It looks like it will be in 4.4.0-80.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[MichaelB]

@Joseph Salisbury (jsalisbury)

Can you please tell me from which version of ubuntu kernel this is
applied. I tried also the last 4.4 on Ubuntu 16.04 (4.4.0-78-generic
#99-Ubuntu SMP) and i have the same problem.

Thanks

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Joseph Salisbury]

This has been fixed upstream by the following commit:

commit 62a6cfddcc0a5313e7da3e8311ba16226fe0ac10
Author: Sachin Prabhu 
Date:   Sun Apr 16 20:37:24 2017 +0100

cifs: Do not send echoes before Negotiate is complete

It has been cc'd to upstream stable and has landed in Xenial and Zesty
master-next via stable updates.

The Yakkety kernel is 4.8 based, which is not maintained upstream
anymore, so I'll submit an SRU request for it to be included in the
Ubuntu kernels.

** No longer affects: linux (Ubuntu Artful)

** Changed in: linux (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Changed in: linux (Ubuntu Zesty)
   Status: In Progress => Fix Committed

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Joseph Salisbury]

** Changed in: linux (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: linux (Ubuntu)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Artful)
   Importance: High
 Assignee: Joseph Salisbury (jsalisbury)
   Status: In Progress

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Also affects: linux (Ubuntu Yakkety)
   Importance: Undecided
   Status: New

** Changed in: linux (Ubuntu Zesty)
   Status: New => In Progress

** Changed in: linux (Ubuntu Yakkety)
   Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: linux (Ubuntu Zesty)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Yakkety)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Xenial)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Yakkety)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Zesty)
 Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[MichaelB]

4.8.0-52-generic #55~16.04.1-Ubuntu released today (2017-05-16) not ok -
The bug is still here too! Please fix this quickly because my company
network are overloaded because of this bug. Thanks!

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Marat Khalili]

4.4.0-77-generic #98-Ubuntu, the bug is still here.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

Fix released in what version?

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Bug Watch Updater]

** Changed in: linux
   Status: Confirmed => Fix Released

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Eric Twose]

At GitHub raspberrypi/linux, 6by9 writes: "[The fix] was applied to the
4.4 tree 5 days ago, so should be in 4.4.64 and later. When Ubuntu bump
the kernel in their repos is totally up to them."

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-
stable.git/log/?id=refs/tags/v4.4.65

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Eric Twose]

At https://bugzilla.kernel.org/show_bug.cgi?id=194531 Steve French
writes:

"The fix was merged into mainline kernel last week, and should be
backported to at least a few older kernels due to cc:stable."

Does that mean it will be fixed for folk reporting issues with Ubuntu
4.4.0-75?


** Bug watch added: Linux Kernel Bug Tracker #194531
   http://bugzilla.kernel.org/194531

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[MichaelB]

I have 5 desktop on Ubuntu 16.04 with various official kernel 4.4, 4.8,
4.10. All this desktop are connected via CIFS to a Windows Server 2008
R2 for a simple shared folder.

After some minutes of activity i got a high CIFS flood traffic between
desktop and server. Many giga per desktop are transferred!


CMD (on desktop): sudo tcpdump -p -s 0  port 445

EXAMPLE (This 5 lines below are in loop and repeated all the time):

12:10:14.778859 IP oracle.microsoft-ds > res3-ubuntu.35514: Flags [R.], seq 1, 
ack 43, win 0, length 0
12:10:14.778891 IP res3-ubuntu.35516 > oracle.microsoft-ds: Flags [S], seq 
2388943218, win 29200, options [mss 1460,sackOK,TS val 11568532 ecr 
0,nop,wscale 7], length 0
12:10:14.779104 IP oracle.microsoft-ds > res3-ubuntu.35516: Flags [S.], seq 
1906593829, ack 2388943219, win 8192, options [mss 1460,nop,wscale 8,sackOK,TS 
val 172827841 ecr 11568532], length 0
12:10:14.779118 IP res3-ubuntu.35516 > oracle.microsoft-ds: Flags [.], ack 1, 
win 229, options [nop,nop,TS val 11568532 ecr 172827841], length 0
12:10:14.779210 IP res3-ubuntu.35516 > oracle.microsoft-ds: Flags [P.], seq 
1:43, ack 1, win 229, options [nop,nop,TS val 11568532 ecr 172827841], length 
42 SMB PACKET: SMBecho (REQUEST)

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Bug Watch Updater]

** Changed in: linux
   Status: New => Confirmed

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

I downgraded to linux-image-4.4.0-66-generic and no longer have the
flooding issue.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[eladner]

If you reboot (or unmount/remount) with the "ls every minute" cron job
active, it should prevent the timeout on the share and not reach the
keep-alive echo that starts the flood.  I think it is about the
15-minute mark (of inactivity) where the client starts the echo flood.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

I did try to install the upstream kernel linux-
image-4.11.0-041100rc8-generic_4.11.0-041100rc8.201704232131_amd64.deb
and linux-
headers-4.11.0-041100rc8-generic_4.11.0-041100rc8.201704232131_amd64.deb
but unfortunately the system barely boots and the networking is messed
up after the change.  I can't tell if the cifs problem is any better.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

My workaround may have added some time, but eventually the share
dismounted :(

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

I failed to mention my kernel version: 4.4.0-75-generic #96-Ubuntu SMP

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

As a workaround, I've added a cron job that does a directory listing on
the share every minute.  It has not stopped the flood but it seems to be
allowing the cifs client to stay connected for a longer period of time
(a major annoyance when the application relies on that share being
available.)

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Dave]

I've got the same problem from a number of Ubuntu 16.04 machines.
They're running on Hyper-V and so they've got the following installed as
per Microsoft recommendations:

linux-virtual-lts-xenial linux-tools-virtual-lts-xenial linux-cloud-
tools-virtual-lts-xenial

It happens a few minutes after mounting an SMB share.  The share
eventually disconnects. I get the errors below on the console and it
starts flooding our SMB share servers. In one instance, we connect to
DFS shares so it is flooding the domain controllers.

Errors seen on console:
CIFS VFS: Autodisabling the use of server inode numbers on \\server\share.  
This server doesn't seem to support them properly.  Hard dlinks will not be 
recognized on this mount.
CIFS VFS: Error -104 sending data on the socket to server.

Since I have the linux-virtual-lts-xenial kernel installed is there a
virtual kernel I can upgrade to or just mainline?

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Eric Twose]

The screenshot above is from traffic between the two RPis, which run
Raspbian (RPi + Debian).

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Eric Twose]

I've got the same flood here, on port 445, across my LAN. If I block
that port, I get a flood instead via port 139.

There was 1MB/s upload/download between my Windows 10 machine and a
Raspberry Pi 3 (4.9.24-v7+).

I blocked that and had the same flood between two Raspberry Pi 3s.

The same thing happened if I fired up my Lubuntu boxes (I can't remember
if it was the 4.4.0-75-generic or the 4.8.0-29-generic, and I can't re-
enable Samba right now on the network, as it's "live" and I don't want
to disrupt the web service).

Have had to temporarily block all 139/445 Samba traffic on all networked
machines, just allowing 139 and 445 from my Windows 10 machine, which is
tolerable, as I need to be able to access network shared folders.

I've attached a screenshot from Wireshark, and I also have the .pcapng
capture file if needed.

** Attachment added: "Screenshot of Wireshark live capture"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686099/+attachment/4869996/+files/wireshark-screenshot.png

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Bug Watch Updater]

** Changed in: linux
   Status: Unknown => New

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1686099/+subscriptions

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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[eladner]

Maybe.  This is a production system so I'll have to schedule something.

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Unknown
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[Joseph Salisbury]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.11 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc8

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Bug watch added: Debian Bug tracker #856843
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

** Also affects: linux via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843
   Importance: Unknown
   Status: Unknown

** Tags added: kernel-da-key

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in Linux:
  Unknown
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[eladner]

The system is behind a firewall so I can't run apport-collect directly.
Is there a way to run it to a file and upload separately?

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[eladner]

** Attachment added: "output from ubuntu-bug linux"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686099/+attachment/4867760/+files/bug.txt

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1686099] Re: connection flood to port 445 on mounting cifs volume under kernel

[eladner]

and the "apport-bug linux" attachment isn't sufficient?

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

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Title:
  connection flood to port 445 on mounting cifs volume under kernel

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This is identical to the bug reported on the Debian kernel list, only
  I'm running 4.4.0, not 4.[89].0

  After about 15 mintues, the cifsd daemon starts flooding echo requests
  on port 445 to the windows server causing a constant 1MB/s load
  (around 10,000 packets per second) that eventually leads to system
  instability that forces a reboot to correct.  This is repeatable and
  as far as I know started about a week ago (possibly with the
  installation of 4.4.0-75).

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856843

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1686099/+subscriptions

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