In drivers/infiniband/core/addr.c:
neigh = dst->neighbour;
if (!neigh || !(neigh->nud_state & NUD_VALID)) {
neigh_event_send(dst->neighbour, NULL);
ret = -ENODATA;
goto put;
}
neigh_event_send() can be passed a NULL pointer, and it will
OOPS when this happens.
Probably you want to just guard the neigh_event_send() call with a
NULL check, and actually use 'neigh' instead of reloading
dst->neighbour unnecessarily.
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