diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 7 | ||||
| -rw-r--r-- | drivers/pci/probe.c | 6 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 0a2eeb82cebd..6c250eb214e8 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -756,6 +756,13 @@ static ssize_t pci_write_config(struct file *filp, struct kobject *kobj, if (ret) return ret; + if (resource_is_exclusive(&dev->driver_exclusive_resource, off, + count)) { + pci_warn_once(dev, "%s: Unexpected write to kernel-exclusive config offset %llx", + current->comm, off); + add_taint(TAINT_USER, LOCKDEP_STILL_OK); + } + if (off > dev->cfg_size) return 0; if (off + count > dev->cfg_size) { diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index b66fa42c4b1f..2f4e88a44e8b 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2307,6 +2307,12 @@ struct pci_dev *pci_alloc_dev(struct pci_bus *bus) INIT_LIST_HEAD(&dev->bus_list); dev->dev.type = &pci_dev_type; dev->bus = pci_bus_get(bus); + dev->driver_exclusive_resource = (struct resource) { + .name = "PCI Exclusive", + .start = 0, + .end = -1, + }; + #ifdef CONFIG_PCI_MSI raw_spin_lock_init(&dev->msi_lock); #endif |