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nl80211/cfg80211: Make addition of new sinfo fields safer

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Add a comment pointing out the use of enum station_info_flags for
all new struct station_info fields. In addition, memset the sinfo
buffer to zero before use on all paths in the current tree to avoid
leaving uninitialized pointers in the data.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jouni Malinen 2011-08-11 11:46:22 +03:00 committed by John W. Linville
parent 040bdf713d
commit f612cedfe1
3 changed files with 7 additions and 0 deletions
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5
include/net/cfg80211.h
View file

@ -563,6 +563,11 @@ struct station_info {
const u8 *assoc_req_ies;
size_t assoc_req_ies_len;
/*
* Note: Add a new enum station_info_flags value for each new field and
* use it to check which fields are initialized.
*/
};
/**

1
net/mac80211/sta_info.c
View file

@ -330,6 +330,7 @@ static int sta_info_finish_insert(struct sta_info *sta, bool async)
ieee80211_sta_debugfs_add(sta);
rate_control_add_sta_debugfs(sta);
memset(&sinfo, 0, sizeof(sinfo));
sinfo.filled = 0;
sinfo.generation = local->sta_generation;
cfg80211_new_sta(sdata->dev, sta->sta.addr, &sinfo, GFP_KERNEL);

1
net/wireless/nl80211.c
View file

@ -2267,6 +2267,7 @@ static int nl80211_dump_station(struct sk_buff *skb,
}
while (1) {
memset(&sinfo, 0, sizeof(sinfo));
err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
mac_addr, &sinfo);
if (err == -ENOENT)