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| author | Eric Dumazet <edumazet@google.com> | 2018-10-09 15:20:50 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-24 08:21:02 +0100 |
| commit | e6c540bf97860b1256ea623f4257743ea22268df (patch) | |
| tree | bb2e401f3d30b86e8ebb8c21a81f13c70042380b /net | |
| parent | b80939a47413c08e1756e437c435e57ffe4b87d9 (diff) | |
| download | linux-stable-e6c540bf97860b1256ea623f4257743ea22268df.tar.gz linux-stable-e6c540bf97860b1256ea623f4257743ea22268df.tar.bz2 linux-stable-e6c540bf97860b1256ea623f4257743ea22268df.zip | |
net: sched: avoid writing on noop_qdisc
[ Upstream commit f98ebd47fd0da1717267ce1583a105d8cc29a16a ]
While noop_qdisc.gso_skb and noop_qdisc.skb_bad_txq are not used
in other places, it seems not correct to overwrite their fields
in dev_init_scheduler_queue().
noop_qdisc is essentially a shared and read-only object, even if
it is not marked as const because of some implementation detail.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/sch_generic.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index 30e32df5f84a..8a4d01e427a2 100644 --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c @@ -577,6 +577,18 @@ struct Qdisc noop_qdisc = { .dev_queue = &noop_netdev_queue, .running = SEQCNT_ZERO(noop_qdisc.running), .busylock = __SPIN_LOCK_UNLOCKED(noop_qdisc.busylock), + .gso_skb = { + .next = (struct sk_buff *)&noop_qdisc.gso_skb, + .prev = (struct sk_buff *)&noop_qdisc.gso_skb, + .qlen = 0, + .lock = __SPIN_LOCK_UNLOCKED(noop_qdisc.gso_skb.lock), + }, + .skb_bad_txq = { + .next = (struct sk_buff *)&noop_qdisc.skb_bad_txq, + .prev = (struct sk_buff *)&noop_qdisc.skb_bad_txq, + .qlen = 0, + .lock = __SPIN_LOCK_UNLOCKED(noop_qdisc.skb_bad_txq.lock), + }, }; EXPORT_SYMBOL(noop_qdisc); @@ -1253,8 +1265,6 @@ static void dev_init_scheduler_queue(struct net_device *dev, rcu_assign_pointer(dev_queue->qdisc, qdisc); dev_queue->qdisc_sleeping = qdisc; - __skb_queue_head_init(&qdisc->gso_skb); - __skb_queue_head_init(&qdisc->skb_bad_txq); } void dev_init_scheduler(struct net_device *dev) |