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net: use NLMSG_DEFAULT_SIZE in nlmsg_new() allocations
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nlmsg_new() adds the size of the netlink header to the value
that has been passed as parameter. If NLMSG_GOODSIZE is selected,
we request an allocation of one memory page plus the size of the
header. Instead, NLMSG_DEFAULT_SIZE should be used since it
already substracts the size of the Netlink header.

I have the impression that the similar naming in both constant
is error prone when using it with nlmsg_new(). This is already
documented in include/net/netlink.h

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso authored and David S. Miller committed May 19, 2009
1 parent e5488ce commit fd2120c
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Showing 2 changed files with 17 additions and 17 deletions.
2 changes: 1 addition & 1 deletion net/irda/irnetlink.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ static int irda_nl_get_mode(struct sk_buff *skb, struct genl_info *info)
if (!dev)
return -ENODEV;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
dev_put(dev);
return -ENOMEM;
Expand Down
32 changes: 16 additions & 16 deletions net/wireless/nl80211.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -388,7 +388,7 @@ static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
if (IS_ERR(dev))
return PTR_ERR(dev);

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_err;

Expand Down Expand Up @@ -716,7 +716,7 @@ static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
if (err)
return err;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out_err;

Expand Down Expand Up @@ -989,7 +989,7 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
goto out;
}

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOMEM;
goto out;
Expand Down Expand Up @@ -1600,7 +1600,7 @@ static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
if (err)
goto out;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out;

Expand Down Expand Up @@ -1994,7 +1994,7 @@ static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
if (err)
goto out;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
goto out;

Expand Down Expand Up @@ -2310,7 +2310,7 @@ static int nl80211_get_mesh_params(struct sk_buff *skb,
goto out;

/* Draw up a netlink message to send back */
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOBUFS;
goto out;
Expand Down Expand Up @@ -2488,7 +2488,7 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
if (!cfg80211_regdomain)
goto out;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg) {
err = -ENOBUFS;
goto out;
Expand Down Expand Up @@ -3541,7 +3541,7 @@ void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
{
struct sk_buff *msg;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;

Expand Down Expand Up @@ -3582,7 +3582,7 @@ void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
{
struct sk_buff *msg;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;

Expand All @@ -3600,7 +3600,7 @@ void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
{
struct sk_buff *msg;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;

Expand All @@ -3622,7 +3622,7 @@ void nl80211_send_reg_change_event(struct regulatory_request *request)
struct sk_buff *msg;
void *hdr;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;

Expand Down Expand Up @@ -3676,7 +3676,7 @@ static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return;

Expand Down Expand Up @@ -3739,7 +3739,7 @@ static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return;

Expand Down Expand Up @@ -3787,7 +3787,7 @@ void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;

msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
if (!msg)
return;

Expand Down Expand Up @@ -3822,7 +3822,7 @@ void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
struct sk_buff *msg;
void *hdr;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;

Expand Down Expand Up @@ -3862,7 +3862,7 @@ void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
void *hdr;
struct nlattr *nl_freq;

msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
if (!msg)
return;

Expand Down

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