[libvirt] [PATCH] udev_device_get_devpath might return NULL

Fix crash on daemon strdup in that case. udev_device_get_devpath returs NULL for '/sys/devices/virtual/block/dm-*' devices. In that case the later strdup segfaults. O.k. to apply? 19:12:46.319: info : udevGetDeviceProperty:111 : udev reports device 'dm-0' does not have property 'DRIVER' 19:12:46.319: debug : udevProcessStorage:954 : No devnode for '/devices/virtual/block/dm-0' 19:12:46.319: info : udevProcessDeviceListEntry:1261 : Failed to create node device for udev device '/sys/devices/virtual/block/dm-0' --- src/node_device/node_device_udev.c | 8 +++++++- 1 files changed, 7 insertions(+), 1 deletions(-) diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c index 9b48052..c7238fc 100644 --- a/src/node_device/node_device_udev.c +++ b/src/node_device/node_device_udev.c @@ -947,8 +947,14 @@ static int udevProcessStorage(struct udev_device *device, { union _virNodeDevCapData *data = &def->caps->data; int ret = -1; + const char* devnode; - data->storage.block = strdup(udev_device_get_devnode(device)); + devnode = udev_device_get_devnode(device); + if(!devnode) { + VIR_DEBUG("No devnode for '%s'\n", udev_device_get_devpath(device)); + goto out; + } + data->storage.block = strdup(devnode); if (udevGetStringProperty(device, "DEVNAME", &data->storage.block) == PROPERTY_ERROR) { -- 1.6.5.3