| Message ID | 20221019183054.105815-2-aconole@redhat.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | openvswitch: syzbot splat fix and introduce selftest | expand |
On 10/19/22 20:30, Aaron Conole wrote: > As noted by Paolo Abeni, pr_warn doesn't generate any splat and can still > preserve the warning to the user that feature downgrade occurred. We > likely cannot introduce other kinds of checks / enforcement here because > syzbot can generate different genl versions to the datapath. > > Reported-by: syzbot+31cde0bef4bbf8ba2d86@syzkaller.appspotmail.com > Fixes: 44da5ae5fbea ("openvswitch: Drop user features if old user space attempted to create datapath") > Cc: Thomas Graf <tgraf@suug.ch> > Signed-off-by: Aaron Conole <aconole@redhat.com> > --- > net/openvswitch/datapath.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c > index c8a9075ddd0a..155263e73512 100644 > --- a/net/openvswitch/datapath.c > +++ b/net/openvswitch/datapath.c > @@ -1616,7 +1616,8 @@ static void ovs_dp_reset_user_features(struct sk_buff *skb, > if (IS_ERR(dp)) > return; > > - WARN(dp->user_features, "Dropping previously announced user features\n"); > + pr_warn("%s: Dropping previously announced user features\n", > + ovs_dp_name(dp)); > dp->user_features = 0; > } > Works fine. Thanks! Acked-by: Ilya Maximets <i.maximets@ovn.org>
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index c8a9075ddd0a..155263e73512 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1616,7 +1616,8 @@ static void ovs_dp_reset_user_features(struct sk_buff *skb, if (IS_ERR(dp)) return; - WARN(dp->user_features, "Dropping previously announced user features\n"); + pr_warn("%s: Dropping previously announced user features\n", + ovs_dp_name(dp)); dp->user_features = 0; }
As noted by Paolo Abeni, pr_warn doesn't generate any splat and can still preserve the warning to the user that feature downgrade occurred. We likely cannot introduce other kinds of checks / enforcement here because syzbot can generate different genl versions to the datapath. Reported-by: syzbot+31cde0bef4bbf8ba2d86@syzkaller.appspotmail.com Fixes: 44da5ae5fbea ("openvswitch: Drop user features if old user space attempted to create datapath") Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by: Aaron Conole <aconole@redhat.com> --- net/openvswitch/datapath.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)