6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jakub Kicinski <kuba@xxxxxxxxxx>
[ Upstream commit cbeb989e41f4094f54bec2cecce993f26f547bea ]
The default dump handler needs to clear ret before returning.
Otherwise if the last interface returns an inconsequential
error this error will propagate to user space.
This may confuse user space (ethtool CLI seems to ignore it,
but YNL doesn't). It will also terminate the dump early
for mutli-skb dump, because netlink core treats EOPNOTSUPP
as a real error.
Fixes: 728480f12442 ("ethtool: default handlers for GET requests")
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231126225806.2143528-1-kuba@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/ethtool/netlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 1a4c11356c96c..fc4ccecf9495c 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -509,7 +509,7 @@ static int ethnl_default_dumpit(struct sk_buff *skb,
cont:
idx++;
}
-
+ ret = 0;
}
rtnl_unlock();
--
2.43.0
