CrowdStrike's Falcon Sensor also linked to Linux kernel panics and crashes

The redhat kernel panics were caused by a bug in the kernel ebpf implementation, likely a regression introduced by a rhel-specific patch. Blaming crowdstrike for this is stupid (just like blaming microsoft for the crowdstrike bsod is stupid).

For background, I also work on a product using eBPFs, and had kernel updates cause kernel panics in my eBPF probes.

In my case, the panic happened because the kernel decided to change an LSM hook interface, adding a new argument in front of the others. When the probe gets loaded, the kernel doesn’t typecheck the arguments, and so doesn’t realise the probe isn’t compatible with the new kernel. When the probe runs, shit happens and you end up with a kernel panic.

eBPF probes causing kernel panics are almost always indication of a kernel bug, not a bug in the ebpf vendor. There are exceptions of course (such as an ebpf denying access to a resource causing pid1 to crash). But they’re very few.

Wait, how is this stupid? Unless I'm missing something, wasn't the patch part of a Microsoft payload that included an update to Crowdstrike? Surely Crowdstrike is culpable, but that doesn't completely absolve Microsoft of any responsibility, as its their payload.