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authorJakub Kicinski <jakub.kicinski@netronome.com>2018-10-26 15:51:06 -0700
committerDavid S. Miller <davem@davemloft.net>2018-10-28 19:23:26 -0700
commit38b4f18d56372e1e21771ab7b0357b853330186c (patch)
tree56f57add90b4f0fbdccd6b5cca4e953f78a92e20 /net
parent822c5f7341366bef761e5e49f05bb8b1b0afccee (diff)
downloadlinux-38b4f18d56372e1e21771ab7b0357b853330186c.tar.gz
net: sched: gred: pass the right attribute to gred_change_table_def()
gred_change_table_def() takes a pointer to TCA_GRED_DPS attribute, and expects it will be able to interpret its contents as struct tc_gred_sopt. Pass the correct gred attribute, instead of TCA_OPTIONS. This bug meant the table definition could never be changed after Qdisc was initialized (unless whatever TCA_OPTIONS contained both passed netlink validation and was a valid struct tc_gred_sopt...). Old behaviour: $ ip link add type dummy $ tc qdisc replace dev dummy0 parent root handle 7: \ gred setup vqs 4 default 0 $ tc qdisc replace dev dummy0 parent root handle 7: \ gred setup vqs 4 default 0 RTNETLINK answers: Invalid argument Now: $ ip link add type dummy $ tc qdisc replace dev dummy0 parent root handle 7: \ gred setup vqs 4 default 0 $ tc qdisc replace dev dummy0 parent root handle 7: \ gred setup vqs 4 default 0 $ tc qdisc replace dev dummy0 parent root handle 7: \ gred setup vqs 4 default 0 Fixes: f62d6b936df5 ("[PKT_SCHED]: GRED: Use central VQ change procedure") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/sch_gred.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c
index cbe4831f46f4..4a042abf844c 100644
--- a/net/sched/sch_gred.c
+++ b/net/sched/sch_gred.c
@@ -413,7 +413,7 @@ static int gred_change(struct Qdisc *sch, struct nlattr *opt,
if (tb[TCA_GRED_PARMS] == NULL && tb[TCA_GRED_STAB] == NULL) {
if (tb[TCA_GRED_LIMIT] != NULL)
sch->limit = nla_get_u32(tb[TCA_GRED_LIMIT]);
- return gred_change_table_def(sch, opt);
+ return gred_change_table_def(sch, tb[TCA_GRED_DPS]);
}
if (tb[TCA_GRED_PARMS] == NULL ||