From: Paolo Abeni <[email protected]> Date: Fri, 18 May 2018 14:51:44 +0200
> Hangbin reported an Oops triggered by the syzkaller qdisc rules: ... > When a red qdisc is updated with a 0 limit, the child qdisc is left > unmodified, no additional scheduler is created in red_change(), > the 'child' local variable is rightfully NULL and must not add it > to the hash table. > > This change addresses the above issue moving qdisc_hash_add() right > after the child qdisc creation. It additionally removes unneeded checks > for noop_qdisc. > > Reported-by: Hangbin Liu <[email protected]> > Fixes: 49b499718fa1 ("net: sched: make default fifo qdiscs appear in the > dump") > Signed-off-by: Paolo Abeni <[email protected]> Applied and queued up for -stable, thanks Paolo.
