diff options
Diffstat (limited to 'drivers/hid/bpf')
| -rw-r--r-- | drivers/hid/bpf/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/hid/bpf/hid_bpf_struct_ops.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/hid/bpf/Kconfig b/drivers/hid/bpf/Kconfig index 83214bae6768..d65482e02a6c 100644 --- a/drivers/hid/bpf/Kconfig +++ b/drivers/hid/bpf/Kconfig @@ -3,7 +3,7 @@ menu "HID-BPF support" config HID_BPF bool "HID-BPF support" - depends on BPF + depends on BPF_JIT depends on BPF_SYSCALL depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS help diff --git a/drivers/hid/bpf/hid_bpf_struct_ops.c b/drivers/hid/bpf/hid_bpf_struct_ops.c index f59cce6e437f..cd696c59ba0f 100644 --- a/drivers/hid/bpf/hid_bpf_struct_ops.c +++ b/drivers/hid/bpf/hid_bpf_struct_ops.c @@ -183,6 +183,10 @@ static int hid_bpf_reg(void *kdata, struct bpf_link *link) struct hid_device *hdev; int count, err = 0; + /* prevent multiple attach of the same struct_ops */ + if (ops->hdev) + return -EINVAL; + hdev = hid_get_device(ops->hid_id); if (IS_ERR(hdev)) return PTR_ERR(hdev); @@ -248,6 +252,7 @@ static void hid_bpf_unreg(void *kdata, struct bpf_link *link) list_del_rcu(&ops->list); synchronize_srcu(&hdev->bpf.srcu); + ops->hdev = NULL; reconnect = hdev->bpf.rdesc_ops == ops; if (reconnect) |