This bug is awaiting verification that the linux-azure/5.4.0-1092.97 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-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
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! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-azure in Ubuntu. https://bugs.launchpad.net/bugs/1990009 Title: Azure: Focal 5.4 kernel eBPF opensnoop does not display PATH Status in linux-azure package in Ubuntu: Fix Released Status in linux-azure source package in Focal: Fix Committed Bug description: SRU Justification [Impact] The actual kernel used on AKS arm64 (i.e. 5.4.1089) suffers from a known problem [1]. As a consequence, opensnoop does not display PATH: # Run the following from Canonical:UbuntuServer:18_04-daily-lts-arm64:18.04.202208290 $ uname -a Linux francis-vm-arm64-ubuntu18vm 5.4.0-1089-azure #94~18.04.1-Ubuntu SMP Fri Aug 5 12:36:48 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux $ lsb_release -rd Description: Ubuntu 18.04.6 LTS Release: 18.04 $ git clone --recurse-submodules https://github.com/iovisor/bcc Linux francis-vm-arm64-ubuntu18vm 5.4.0-1089-azure #94~18.04.1-Ubuntu SMP Fri Aug 5 12:36:48 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux $ sudo sh -c 'apt update && apt install -qy clang-10 llvm-10 make gcc pkg-config libelf-dev libz-dev' ... $ cd bcc/libbpf-tools $ CLANG=clang-10 LLVM_STRIP=llvm-strip-10 make -j opensnoop ... BINARY opensnoop $ sudo ./opensnoop PID COMM FD ERR PATH 1672 python3 3 0 9746 opensnoop 20 0 1672 python3 3 0 1672 python3 3 0 1672 python3 -1 2 1672 python3 3 0 1 systemd 18 0 1672 python3 6 0 1672 python3 3 0 1672 python3 3 0 1672 python3 3 0 1672 python3 3 0 1672 python3 3 0 ^C As you can see, nothing is printed for the PATH while normal behavior prints the path of the opened file: $ uname -a Linux pwmachine 5.15.0-46-generic #49~20.04.1-Ubuntu SMP Thu Aug 4 19:15:44 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux $ sudo ./opensnoop PID COMM FD ERR PATH 2704 systemd 23 0 virtual 2704 systemd 22 0 misc 2704 systemd 23 0 fuse 2704 systemd 22 0 /sys/devices/virtual/misc/fuse/uevent 2704 systemd 22 0 /run/udev/data/c10:229 2704 systemd 22 0 /proc/2704/status 2704 systemd 22 0 /proc/2704/status 2704 systemd 22 0 /proc/2704/status ^C This bug was fixed in upstream patch [2] Sadly, this patch was not back ported, so it is not present in stable kernels. [Test plan] Follow the above instructions [Where things could go wrong] Unknown [Other Info] Original RFC at https://lists.ubuntu.com/archives/kernel- team/2022-September/133038.html To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1990009/+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
