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author | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-08 14:40:43 +0200 |
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committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-08 14:40:43 +0200 |
commit | 5f54c8b2d4fad95d1f8ecbe023ebe6038e6d3760 (patch) | |
tree | daca83ea5f9af1bd158504bd0b5af89c5a99b7fa /net/sched/sch_sfq.c | |
parent | Merge branch 'kvm-ppc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc (diff) | |
parent | KVM: PPC: Book3S HV: Protect updates to spapr_tce_tables list (diff) | |
download | linux-dev-5f54c8b2d4fad95d1f8ecbe023ebe6038e6d3760.tar.xz linux-dev-5f54c8b2d4fad95d1f8ecbe023ebe6038e6d3760.zip |
Merge branch 'kvm-ppc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
This fix was intended for 4.13, but didn't get in because both
maintainers were on vacation.
Paul Mackerras:
"It adds mutual exclusion between list_add_rcu and list_del_rcu calls
on the kvm->arch.spapr_tce_tables list. Without this, userspace could
potentially trigger corruption of the list and cause a host crash or
worse."
Diffstat (limited to 'net/sched/sch_sfq.c')
-rw-r--r-- | net/sched/sch_sfq.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c index f80ea2cc5f1f..82469ef9655e 100644 --- a/net/sched/sch_sfq.c +++ b/net/sched/sch_sfq.c @@ -437,6 +437,7 @@ congestion_drop: qdisc_drop(head, sch, to_free); slot_queue_add(slot, skb); + qdisc_tree_reduce_backlog(sch, 0, delta); return NET_XMIT_CN; } @@ -468,8 +469,10 @@ enqueue: /* Return Congestion Notification only if we dropped a packet * from this flow. */ - if (qlen != slot->qlen) + if (qlen != slot->qlen) { + qdisc_tree_reduce_backlog(sch, 0, dropped - qdisc_pkt_len(skb)); return NET_XMIT_CN; + } /* As we dropped a packet, better let upper stack know this */ qdisc_tree_reduce_backlog(sch, 1, dropped); |