Hi,
maybe some additional information.
The eBPF program is of type BPF_PROG_TYPE_PERF_EVENT and attached to all
CPUs via the perf subsystem and the use of PERF_COUNT_SW_CPU_CLOCK. It
is executed on a constant sampling frequency (usually 20 Hz).
We also do have qemus guest memory dumps available if this would help
investigate the issue.
- florian
On Fri, 24 Mar 2023 12:44:33 +0100 =?utf-8?q?Tim_R=C3=BChsen?=
<tim.rueh...@gmx.de> wrote:
Package: linux-image-amd64
Version: 6.1.20-1
Severity: important
X-Debbugs-Cc: tim.rueh...@gmx.de
Dear Maintainer,
* What led up to the situation?
We run a priviledged eBPF based tool with a communication between kernel and
user space.
It runs without issues on kernels 4.15 to 5.18.
On kernels 5.19+, the whole system freezes after a few minutes.
It seems that with more system activities (load, forks) the freeze happens
earlier.
The underlying hardware seems to play no role, we could reproduce this on
different
bare metal systems as well as within a qemu based VM.
Since the running program is rather complex, it is not easily possible to carve
out a small reproducer.
We can provide gdb backtraces from freezes inside qemu.
-- System Information:
Debian Release: 12.0
APT prefers testing-security
APT policy: (500, 'testing-security'), (500, 'testing-debug'), (500,
'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 6.1.0-7-amd64 (SMP w/20 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=locale: Cannot set
LC_ALL to default locale: No such file or directory
UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages linux-image-amd64 depends on:
ii linux-image-6.1.0-7-amd64 6.1.20-1
linux-image-amd64 recommends no packages.
linux-image-amd64 suggests no packages.
-- debconf information:
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_TIME = "en_DE.UTF-8",
LC_MONETARY = "en_DE.UTF-8",
LC_COLLATE = "en_DE.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
locale: Cannot set LC_ALL to default locale: No such file or directory
