diff options
| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2017-08-19 12:37:07 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-30 08:21:42 (GMT) |
| commit | 7fa2fdf9f19e3b4bc71051c115271741369b5e7f (patch) | |
| tree | 0731370394acb339b7469408cad02d865128f199 /kernel | |
| parent | 3e00bf91fefced104ba91721674efe4502cb416a (diff) | |
| download | linux-7fa2fdf9f19e3b4bc71051c115271741369b5e7f.tar.xz | |
net_sched: fix order of queue length updates in qdisc_replace()
[ Upstream commit 68a66d149a8c78ec6720f268597302883e48e9fa ]
This important to call qdisc_tree_reduce_backlog() after changing queue
length. Parent qdisc should deactivate class in ->qlen_notify() called from
qdisc_tree_reduce_backlog() but this happens only if qdisc->q.qlen in zero.
Missed class deactivations leads to crashes/warnings at picking packets
from empty qdisc and corrupting state at reactivating this class in future.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Fixes: 86a7996cc8a0 ("net_sched: introduce qdisc_replace() helper")
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions