• J
    usb: initialize libusb_device to avoid crash · 3ce21445
    Jincheng Miao 提交于
    If libusb_get_device_list() fails, the uninitialized local variable
    libusb_device would be passed to libusb_free_device_list(), that
    will cause a crash, like:
    (gdb) bt
     #0  0x00007fbbb4bafc10 in pthread_mutex_lock () from /lib64/libpthread.so.0
     #1  0x00007fbbb233e653 in libusb_unref_device (dev=0x6275682d627375)
         at core.c:902
     #2  0x00007fbbb233e739 in libusb_free_device_list (list=0x7fbbb6e8436e,
         unref_devices=<optimized out>) at core.c:653
     #3  0x00007fbbb6cd80a4 in usb_host_auto_check (unused=unused@entry=0x0)
         at hw/usb/host-libusb.c:1446
     #4  0x00007fbbb6cd8525 in usb_host_initfn (udev=0x7fbbbd3c5670)
         at hw/usb/host-libusb.c:912
     #5  0x00007fbbb6cc123b in usb_device_init (dev=0x7fbbbd3c5670)
         at hw/usb/bus.c:106
     ...
    
    So initialize libusb_device at the begin time.
    Signed-off-by: NJincheng Miao <jmiao@redhat.com>
    Reviewed-by: NGonglei <arei.gonglei@huawei.com>
    Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
    3ce21445
host-libusb.c 48.8 KB