diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 31d02e61e1e6766174ffc654199347735d1f60e8..d8544c766125cf633e02eb258990e3ea71380ac4 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -785,6 +785,9 @@ static int kfd_ioctl_get_process_apertures_new(struct file *filp, goto out_unlock; } + if (args->num_of_nodes > kfd_topology_get_num_devices()) + return -EINVAL; + /* Fill in process-aperture information for all available * nodes, but not more than args->num_of_nodes as that is * the amount of memory allocated by user diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index cb5696a63ecc477f02e1e2c7f89299cf1930b8f3..12de27f58edf06f9abddd8c632331c08112cce53 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -1148,6 +1148,7 @@ static inline struct kfd_node *kfd_node_by_irq_ids(struct amdgpu_device *adev, return NULL; } int kfd_topology_enum_kfd_devices(uint8_t idx, struct kfd_node **kdev); +uint32_t kfd_topology_get_num_devices(void); int kfd_numa_node_to_apic_id(int numa_node_id); /* Interrupts */ diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c index e079e272d5c78047bdc504bb1066aac5ddc02bc2..97a2b1d86e8579f37bf4ccbe0ce24d518feb3afc 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c @@ -2177,6 +2177,17 @@ int kfd_topology_remove_device(struct kfd_node *gpu) return res; } +uint32_t kfd_topology_get_num_devices(void) +{ + uint32_t num_devices; + + down_read(&topology_lock); + num_devices = sys_props.num_devices; + up_read(&topology_lock); + + return num_devices; +} + /* kfd_topology_enum_kfd_devices - Enumerate through all devices in KFD * topology. If GPU device is found @idx, then valid kfd_dev pointer is * returned through @kdev