From: Aaron Conole <aconole@xxxxxxxxxx>
[ Upstream commit fd954cc1919e35cb92f78671cab6e42d661945a3 ]
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@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 44da5ae5fbea ("openvswitch: Drop user features if old user space attempted to create datapath")
Cc: Thomas Graf <tgraf@xxxxxxx>
Signed-off-by: Aaron Conole <aconole@xxxxxxxxxx>
Acked-by: Ilya Maximets <i.maximets@xxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 46ef1525b2e5..94c48122fdc3 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1605,7 +1605,8 @@ 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;
}
--
2.35.1
