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netdev: Check that netdev->device is not NULL

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Check that netdev->device is not NULL before doing device_remove()
(which would crash) and emitting NETDEV_WATCH_EVENT_DEL.  It may be
NULL if the initial RTM_SETLINK has failed to bring device UP.
This commit is contained in:
Andrew Zaborowski 2018-10-05 03:53:14 +02:00 committed by Denis Kenzior
parent d7dbbf66a0
commit fb85b1d1a7
1 changed files with 5 additions and 3 deletions
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8
src/netdev.c
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@ -612,9 +612,11 @@ static void netdev_free(void *data)
netdev->set_powered_cmd_id = 0;
}
WATCHLIST_NOTIFY(&netdev_watches, netdev_watch_func_t,
netdev, NETDEV_WATCH_EVENT_DEL);
device_remove(netdev->device);
if (netdev->device) {
WATCHLIST_NOTIFY(&netdev_watches, netdev_watch_func_t,
netdev, NETDEV_WATCH_EVENT_DEL);
device_remove(netdev->device);
}
watchlist_destroy(&netdev->frame_watches);
watchlist_destroy(&netdev->station_watches);