Commit 8cbe1d46 authored May 03, 2005 by Stephen Hemminger Committed by David S. Miller May 03, 2005

[PKT_SCHED]: netetm: trap infinite loop hange on qlen underflow



Due to bugs in netem (fixed by later patches), it is possible to get qdisc
qlen to go negative. If this happens the CPU ends up spinning forever
in qdisc_run(). So add a BUG_ON() to trap it.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent bd96535b

net/sched/sch_generic.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -179,6 +179,7 @@ int qdisc_restart(struct net_device *dev)
		netif_schedule(dev);
		return 1;
		}
		BUG_ON((int) q->q.qlen < 0);
		return q->q.qlen;
		}