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Date: Tue, 14 Dec 2021 00:42:30 -0800
From: Eric Dumazet <eric.dumazet@...il.com>
To: "David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
Cc: netdev <netdev@...r.kernel.org>,
Eric Dumazet <edumazet@...gle.com>,
Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next] ethtool: use ethnl_parse_header_dev_put()
From: Eric Dumazet <edumazet@...gle.com>
It seems I missed that most ethnl_parse_header_dev_get() callers
declare an on-stack struct ethnl_req_info, and that they simply call
dev_put(req_info.dev) when about to return.
Add ethnl_parse_header_dev_put() helper to properly untrack
reference taken by ethnl_parse_header_dev_get().
Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
net/ethtool/cabletest.c | 4 ++--
net/ethtool/channels.c | 2 +-
net/ethtool/coalesce.c | 2 +-
net/ethtool/debug.c | 2 +-
net/ethtool/eee.c | 2 +-
net/ethtool/features.c | 2 +-
net/ethtool/fec.c | 2 +-
net/ethtool/linkinfo.c | 2 +-
net/ethtool/linkmodes.c | 2 +-
net/ethtool/module.c | 2 +-
net/ethtool/netlink.h | 5 +++++
net/ethtool/pause.c | 2 +-
net/ethtool/privflags.c | 2 +-
net/ethtool/rings.c | 2 +-
net/ethtool/tunnels.c | 6 +++---
net/ethtool/wol.c | 2 +-
16 files changed, 23 insertions(+), 18 deletions(-)
diff --git a/net/ethtool/cabletest.c b/net/ethtool/cabletest.c
index 63560bbb7d1f0b4a4ca76b2986e896d922bd7745..920aac02fe390edcc512ca1beaafd874a2fdb937 100644
--- a/net/ethtool/cabletest.c
+++ b/net/ethtool/cabletest.c
@@ -96,7 +96,7 @@ int ethnl_act_cable_test(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev_put:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
@@ -353,7 +353,7 @@ int ethnl_act_cable_test_tdr(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev_put:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 6a070dc8e4b0dba90656d92f742320200c6bdfe3..403158862011588ded7a448b13e39702551b2df4 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -219,6 +219,6 @@ int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/coalesce.c b/net/ethtool/coalesce.c
index 46776ea42a92e1daf2982f06287b2227d9b045f7..487bdf345541ad1966702e600335a015edd9feda 100644
--- a/net/ethtool/coalesce.c
+++ b/net/ethtool/coalesce.c
@@ -336,6 +336,6 @@ int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/debug.c b/net/ethtool/debug.c
index f99912d7957ead331a772dbdd70a64f0e374b7ae..d73888c7d19ca71eb384cf89aa2ffc786c6a3f30 100644
--- a/net/ethtool/debug.c
+++ b/net/ethtool/debug.c
@@ -123,6 +123,6 @@ int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/eee.c b/net/ethtool/eee.c
index e10bfcc0785317f3b19e2ee2d0513c60a495151b..45c42b2d5f1785c4ff3492b6d78e0c826c583ba9 100644
--- a/net/ethtool/eee.c
+++ b/net/ethtool/eee.c
@@ -185,6 +185,6 @@ int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index 2e7331b23996aa7b09b2eb5d4d34b9b407c98b74..55d449a2d3fcb35d0b3952a8184f3079e3403cde 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -283,6 +283,6 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/fec.c b/net/ethtool/fec.c
index 8738dafd5417227724cba9e36dd3dff4dd44d636..9f5a134e2e01361bfb9edf44f982f821f0fdefb1 100644
--- a/net/ethtool/fec.c
+++ b/net/ethtool/fec.c
@@ -305,6 +305,6 @@ int ethnl_set_fec(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/linkinfo.c b/net/ethtool/linkinfo.c
index b91839870efc990119a51fc5ff63e62f35643491..efa0f7f488366c14bd44a03f8568f28fad017fed 100644
--- a/net/ethtool/linkinfo.c
+++ b/net/ethtool/linkinfo.c
@@ -149,6 +149,6 @@ int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c
index f9eda596f301408ce145d2cb996023dd37b1a0f6..99b29b4fe9472f5e2de1c10ecd33d8248cd1687c 100644
--- a/net/ethtool/linkmodes.c
+++ b/net/ethtool/linkmodes.c
@@ -358,6 +358,6 @@ int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/module.c b/net/ethtool/module.c
index bc2cef11bbdad6649948289c47bc4fe0b6c4579b..898ed436b9e41db688a70e65e47b18ae1176d275 100644
--- a/net/ethtool/module.c
+++ b/net/ethtool/module.c
@@ -175,6 +175,6 @@ int ethnl_set_module(struct sk_buff *skb, struct genl_info *info)
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index a779bbb0c524f00e7a798bc8448bebbd43b65488..75856db299e9d3d2d1ba041ee8c9c32abe37ca53 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -235,6 +235,11 @@ struct ethnl_req_info {
u32 flags;
};
+static inline void ethnl_parse_header_dev_put(struct ethnl_req_info *req_info)
+{
+ dev_put_track(req_info->dev, &req_info->dev_tracker);
+}
+
/**
* struct ethnl_reply_data - base type of reply data for GET requests
* @dev: device for current reply message; in single shot requests it is
diff --git a/net/ethtool/pause.c b/net/ethtool/pause.c
index ee1e5806bc93a4bf60fe18bf15ee9b01af190b62..a8c113d244db9c4e13f089ddb40e3d390f620148 100644
--- a/net/ethtool/pause.c
+++ b/net/ethtool/pause.c
@@ -181,6 +181,6 @@ int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index fc9f3be23a19d82236bd001024237fb191d0e53c..4c7bfa81e4abf4c0478a9eae9892418113c87f09 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -196,6 +196,6 @@ int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 450b8866373d17d9318ca7802f946d36e646fc1e..c1d5f5e0fdc98e58de88e77d3c783be15022dc43 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -196,6 +196,6 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
diff --git a/net/ethtool/tunnels.c b/net/ethtool/tunnels.c
index e7f2ee0d2471977a57761a89f0a1764a7dce82b1..efde3353668734d7d0457d721f8ecd7a4e0bc551 100644
--- a/net/ethtool/tunnels.c
+++ b/net/ethtool/tunnels.c
@@ -195,7 +195,7 @@ int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info)
if (ret)
goto err_free_msg;
rtnl_unlock();
- dev_put(req_info.dev);
+ ethnl_parse_header_dev_put(&req_info);
genlmsg_end(rskb, reply_payload);
return genlmsg_reply(rskb, info);
@@ -204,7 +204,7 @@ int ethnl_tunnel_info_doit(struct sk_buff *skb, struct genl_info *info)
nlmsg_free(rskb);
err_unlock_rtnl:
rtnl_unlock();
- dev_put(req_info.dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
@@ -230,7 +230,7 @@ int ethnl_tunnel_info_start(struct netlink_callback *cb)
sock_net(cb->skb->sk), cb->extack,
false);
if (ctx->req_info.dev) {
- dev_put(ctx->req_info.dev);
+ ethnl_parse_header_dev_put(&ctx->req_info);
ctx->req_info.dev = NULL;
}
diff --git a/net/ethtool/wol.c b/net/ethtool/wol.c
index ada7df2331d20d088a75ffcc1c210aff69c99791..88f435e76481d780f531c0e1eda5d29c4ae25a10 100644
--- a/net/ethtool/wol.c
+++ b/net/ethtool/wol.c
@@ -165,6 +165,6 @@ int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info)
out_rtnl:
rtnl_unlock();
out_dev:
- dev_put(dev);
+ ethnl_parse_header_dev_put(&req_info);
return ret;
}
--
2.34.1.173.g76aa8bc2d0-goog
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