Bug 218320
| Summary: | HID-BPF fails to initialise, EINVAL | ||
|---|---|---|---|
| Product: | Linux | Reporter: | Chris Rankin (rankincj) |
| Component: | Kernel | Assignee: | Virtual assignee for kernel bugs (linux-kernel) |
| Status: | NEW --- | ||
| Severity: | normal | ||
| Priority: | P3 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 6.6.8 | Subsystem: | hid-bpf |
| Regression: | No | Bisected commit-id: | |
| Attachments: | Kernel config for 6.6.8 | ||
FWIW I have discovered that my kernel was missing CONFIG_DEBUG_INFO_BTF, and I also hadn't installed the pahole tool on my build machine. Perhaps the Kconfig rules need updating? |
Created attachment 305655 [details] Kernel config for 6.6.8 Trying to configure a 6.6.8 kernel to use HID-BPF, but it fails to initialise: [ 3.210054] hid_bpf: error while preloading HID BPF dispatcher: -22 The issue appears to relate to entrypoints_bpf__load(), specifically the "run" stage of bpf_load_and_run(). This is almost certainly a configuration issue, and so I have attached my kernel config. I suspect that hid-bpf has a missing extra dependency beyond CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y.