after turning OFF all HW features of the LANIC.
only CRC calculation remains in the LANIC.
I have not seen the effect in wireshark again.
I assume the LANIC was adding TCP segments together.
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I monitor with wireshark and it can be any TCP payload.
the common TCP header part is flag PUSH is ON.
It happens in both directions.
** Summary changed:
- tcp has MSS=1460, but TLSv1.3 payload is overshooting maximum segment size
+ tcp has MSS=1460, but a segment with PUSH flag is overshooting
I have a stateless firewall (nft) which drops ip.len>1500 input ethernet frames.
therefore you see TCP flow control with resend data.
filter the wireshark trace with "ip.len>1500"
all the input ethernet frames (destination ipv4 10.0.0.2) seen in wireshark
trace
are dropped in nft filter hook
Public bug reported:
a wireshark trace will follow.
filter for "ip.len>1500" in the wireshark trace
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-modules-6.5.0-14-generic 6.5.0-14.14~22.04.1
ProcVersionSignature: Ubuntu 6.5.0-14.14~22.04.1-generic 6.5.3
Uname: Linux
** Attachment added: "snapcraft_tcp_over_MSS.pcapng"
https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.5/+bug/2049993/+attachment/5741126/+files/snapcraft_tcp_over_MSS.pcapng
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"freeing initrd memory" pointed me in the right direction.
I have modified /etc/initramfs-tools/initramfs.conf short time before.
changed "COMPRESS=bzip2" and got a smaller file in the file-system
moved back to "COMPRESS=zstd" , update-initramfs -u and got the original
filesize.
after reboot
Public bug reported:
root@prod:/home/bernie22/fw# journalctl -b |grep finished
Jul 25 09:56:31 prod systemd[1]: Startup finished in 14.256s (kernel) + 3.272s
(userspace) = 17.529s.
Jul 25 09:56:33 prod systemd[867]: Startup finished in 1.485s.
Jul 25 09:56:50 prod systemd[1222]: Startup finished
apport information
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676623/+files/acpidump.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676620/+files/ProcModules.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676622/+files/WifiSyslog.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676619/+files/ProcInterrupts.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676621/+files/UdevDb.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676616/+files/ProcCpuinfo.txt
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** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676617/+files/ProcCpuinfoMinimal.txt
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** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676618/+files/ProcEnviron.txt
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** Attachment added: "PaInfo.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676615/+files/PaInfo.txt
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apport information
** Attachment added: "Lsusb-v.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676614/+files/Lsusb-v.txt
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** Attachment added: "Lsusb-t.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676613/+files/Lsusb-t.txt
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** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676612/+files/Lsusb.txt
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apport information
** Attachment added: "Lspci-vt.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676611/+files/Lspci-vt.txt
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** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676610/+files/Lspci.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676608/+files/CurrentDmesg.txt
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** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676609/+files/IwConfig.txt
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** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/2021563/+attachment/5676607/+files/CRDA.txt
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apport information
** Tags added: apport-collected
** Description changed:
oot@prod:/home/bernie22# journalctl -b |grep lockdown
Mai 30 08:25:44 prod kernel: Command line:
BOOT_IMAGE=/boot/vmlinuz-5.19.0-42-generic
root=UUID=6f01374f-146b-402e-b36b-23f040ef48d2 ro
Hi all,
I am using Ubuntu 22.04LTS with kernel 5.19.0-41 and have this at bootup
journalctl:[8.778039] prod kernel: snd_hda_intel :00:1b.0: Too many BDL
entries: buffer=2097152, period=65536
journalctl:[ 19.134032] prod kernel: snd_hda_intel :00:1b.0: Too many BDL
entries:
looked into the source code of the kernel
there is include/uapi/linux/if_ether.h
inside are defines ETH_P_*
this brings me to the general question for nftables
how to build "ethernet level" firewall controlling all possible "ether
type" at hook "ingress" ?
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apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605731/+files/IwConfig.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605730/+files/CurrentDmesg.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605732/+files/Lspci.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605742/+files/ProcModules.txt
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and here is the catch of today
** Attachment added: "ether_type_0x800_miss_2022-07-28 08-28-24.png"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1980590/+attachment/5605746/+files/ether_type_0x800_miss_2022-07-28%2008-28-24.png
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605743/+files/UdevDb.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605741/+files/ProcInterrupts.txt
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apport information
** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605740/+files/ProcEnviron.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605738/+files/ProcCpuinfo.txt
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apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605739/+files/ProcCpuinfoMinimal.txt
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** Attachment added: "PaInfo.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605737/+files/PaInfo.txt
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apport information
** Attachment added: "Lsusb-v.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605736/+files/Lsusb-v.txt
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** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605734/+files/Lsusb.txt
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apport information
** Attachment added: "Lsusb-t.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605735/+files/Lsusb-t.txt
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apport information
** Attachment added: "Lspci-vt.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605733/+files/Lspci-vt.txt
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apport information
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605745/+files/acpidump.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605744/+files/WifiSyslog.txt
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apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1980590/+attachment/5605729/+files/CRDA.txt
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https://bugs.launchpad.net/bugs/1980590
apport information
** Tags added: apport-collected jammy
** Description changed:
an android app is sending big UDP datagrams, this generates IPv4 fragments
this IPv4 fragments can not be controlled in firewall nftables family netdev
hook ingress.
platform: Ubuntu 22.04LTS, latest
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