Any update for me? Is there something that I can test?
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Title:
Kernel crash with tshark/tcpdump
Status in linux package in Ubuntu:
Perhaps "tcpdump" sets no filter, but tshark does have some default it's
using?
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Title:
Kernel crash with tshark/tcpdump
Status in
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
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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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
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
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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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:
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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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
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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Uh, sorry, but couldn't the bug also lurk in Ubuntu's patches?
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Title:
Kernel crash with tshark/tcpdump
Status in linux package in
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
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"
# 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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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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Public bug reported:
Reproducible crash when just running "tcpdump -i br0" (or any other
interface).
[ 95.615160] Oops: Exception in kernel mode, sig: 4 [#1]
[ 95.615237] SMP NR_CPUS=2048 NUMA PowerNV
[ 95.615245] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink
bluetooth
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