With the introduction of commit e42ac1418055 ("bpf: Check unsupported ops from the bpf_struct_ops's cfi_stubs"), a HID-BPF struct_ops containing a .hid_hw_request() or a .hid_hw_output_report() was failing to load as the cfi stubs were not defined.

Fix that by defining those simple static functions and restore HID-BPF functionality.

This was detected with the HID selftests suddenly failing on Linus' tree.

Cc: stable@vger.kernel.org # v6.11+ Fixes: 9286675a2aed ("HID: bpf: add HID-BPF hooks for hid_hw_output_report") Fixes: 8bd0488b5ea5 ("HID: bpf: add HID-BPF hooks for hid_hw_raw_requests") Signed-off-by: Benjamin Tissoires bentiss@kernel.org --- Hi,

This commit should directly go in Linus tree before we start creating topic branches for 6.13 given that the CI is now failing on our HID master branch.

Cheers, Benjamin --- drivers/hid/bpf/hid_bpf_struct_ops.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)

diff --git a/drivers/hid/bpf/hid_bpf_struct_ops.c b/drivers/hid/bpf/hid_bpf_struct_ops.c index cd696c59ba0f..702c22fae136 100644 --- a/drivers/hid/bpf/hid_bpf_struct_ops.c +++ b/drivers/hid/bpf/hid_bpf_struct_ops.c @@ -276,9 +276,23 @@ static int __hid_bpf_rdesc_fixup(struct hid_bpf_ctx *ctx) return 0; }

+static int __hid_bpf_hw_request(struct hid_bpf_ctx *ctx, unsigned char reportnum, + enum hid_report_type rtype, enum hid_class_request reqtype, + u64 source) +{ + return 0; +} + +static int __hid_bpf_hw_output_report(struct hid_bpf_ctx *ctx, u64 source) +{ + return 0; +} + static struct hid_bpf_ops __bpf_hid_bpf_ops = { .hid_device_event = __hid_bpf_device_event, .hid_rdesc_fixup = __hid_bpf_rdesc_fixup, + .hid_hw_request = __hid_bpf_hw_request, + .hid_hw_output_report = __hid_bpf_hw_output_report, };

static struct bpf_struct_ops bpf_hid_bpf_ops = {

--- base-commit: 13882369ceb9b0953f9f5ff8563bbccfd80d0ffd change-id: 20240927-fix-hid-bpf-stubs-f80591a673c2

Best regards,