Any update for me? Is there something that I can test?
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Title:
Kernel crash with tshark/tcpdump
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ht
Perhaps "tcpdump" sets no filter, but tshark does have some default it's
using?
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Title:
Kernel crash with tshark/tcpdump
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4.2.0-34-generic is ... strange.
"tcpdump" works as expected:
14412 packets captured
14430 packets received by filter
15 packets dropped by kernel
but "tshark" with the same options crashes the kernel:
[ 137.709794] Oops: Exception in kernel mode, sig: 4 [#1]
[ 137.709872] SMP NR_C
You only need to install the -extra packages when downloading the .deb
directly from launchpad.
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Title:
Kernel crash with tshark/tcpdump
To mana
No.
Are such essential things like the "standard" SCSI controller in an
extra package? Really?
Well, or would that be storage-core-modules-4.2.0-34-generic-
di-4.2.0-34.39? Does the -extra encompass all the separate module
packages?
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Hi Philipp,
Did you happen to install both the linux-image and linux-image-extra
.deb packages?
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Title:
Kernel crash with tshark/tcpdump
To man
linux-image-4.4.0-1-generic_4.4.0-1.15_ppc64el.deb is missing the SCSI
modules, too -- do I need to install additional packages?
4.4.0-15.31 gives me this:
> [ 2256.803739] Netfilter messages via NETLINK v0.30.
> [ 2257.806152] [ cut here ]
> [ 2257.806231] Kernel BUG at d
Do you happen to know if this bug is present in other releases as well
or only Xenial?
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Title:
Kernel crash with tshark/tcpdump
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I'm not sure of the exact commit that fixed this. Since Xenial is the
development kernel, we are constantly applying commits from upstream.
There were ~328 commits going from 4.4.0-11 to 4.4.0-13:
One way to pin point the exact fix would be to perform a reverse bisect,
but that can be time consum
Sadly that is not reproducible in a VM - if it was, I'd have made an
automated bisect run...
No, I don't know, sorry.
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Title:
Kernel crash with
Sorry, got another crash right now, in run_filter+0x6c/0xc0.
[93544.101832] [ cut here ]
[93544.101920] Kernel BUG at ddc5 [verbose debug info unavailable]
[93544.101935] Oops: Exception in kernel mode, sig: 5 [#1]
[93544.101954] SMP NR_CPUS=2048 NUMA Po
It sounds like this bug may be fixed in the latest Xenial kernel. Can
you apply the latest updates and see if the bug is resolved.
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Title:
Kerne
linux-image-4.2.0-34-generic_4.2.0-34.39_ppc64el.deb doesn't boot, it
seems to be missing some SCSI drivers.
linux-image-4.4.0-13-generic ppc64el 4.4.0-13.29 did work for me:
17996 packets captured
18004 packets received by filter
6 packets dropped by kernel
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Well, that's what I meant by "linux-image-4.4.0-13-generic ppc64el
4.4.0-13.29 did work for me".
Would you care to point me to the fixing commit, just out of interest?
Thanks a lot.
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htt
Thanks again for testing. Your test results indicates this bug may have
been introduced by a SAUCE patch. Can you test the following to kernels
to see if this was introduced in Xenial?:
First v4.4 Xenial kernel:
https://launchpad.net/ubuntu/+source/linux/4.4.0-1.15/+build/8880829
Last WIly
ker
Is there a git tree that includes Ubuntu patches, so that I could try a
bisect there?
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Title:
Kernel crash with tshark/tcpdump
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http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.2-wily/linux-
image-4.4.2-040402-generic_4.4.2-040402.201602171633_ppc64el.deb
WORKSFORME ;)
39716 packets captured
39732 packets received by filter
14 packets dropped by kernel
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Yes, the bug could have been introduced by an Ubuntu SAUCE patch.
Testing the upstream kernels will tell us whether that is the case. Can
you next the upstream v4.4.2 kernel? That is the upstream kernel Ubuntu
4.4.0-7-generic is based off of. If it does have the bug, then we know
the bug was fix
Uh, sorry, but couldn't the bug also lurk in Ubuntu's patches?
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Title:
Kernel crash with tshark/tcpdump
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This 4.5.0rc1 package works, too.
117 packets captured
131 packets received by filter
14 packets dropped by kernel
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Title:
Kernel crash with tsh
Thanks for testing the mainline kernel. It sounds like the bug is fixed
upstream. We could perform a "Reverse" bisect to identify the commit
that fixes this issue. We first need to identify the last bad kernel
and the first good kernel by testing some of the 4.5 release candidates.
Can you firs
Using http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.5-rc7-wily/linux-
image-4.5.0-040500rc7-generic_4.5.0-040500rc7.201603061830_ppc64el.deb
the bnx2x interfaces don't come up by themselves; I've had to use the
serial console to do "ifconfig eth3 up" manually.
Other than that, "tcpdump -i br0"
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.5 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 th
# gdb /usr/lib/debug/boot/vmlinux-4.4.0-11-generic
(gdb) l *run_filter+0x6c/0xc0
0xc0ab1ab0 is in run_filter
(/build/linux-xlQMJr/linux-4.4.0/net/packet/af_packet.c:1951).
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https:
Happened with 4.4.0-7-generic too, didn't try older versions.
Happens every time, with or without filter on the "tcpdump" command
line.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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