diff options
| author | Jouni Malinen | 2011-08-11 10:46:22 +0200 |
|---|---|---|
| committer | John W. Linville | 2011-08-11 20:23:06 +0200 |
| commit | f612cedfe152b536197c0120f2e7779bc90219d0 (patch) | |
| tree | c1ad3b3a00a26eff4b78d81331c168faf901a4ba | |
| parent | cfg80211: fix a crash in nl80211_send_station (diff) | |
| download | kernel-qcow2-linux-f612cedfe152b536197c0120f2e7779bc90219d0.tar.gz kernel-qcow2-linux-f612cedfe152b536197c0120f2e7779bc90219d0.tar.xz kernel-qcow2-linux-f612cedfe152b536197c0120f2e7779bc90219d0.zip | |
nl80211/cfg80211: Make addition of new sinfo fields safer
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>
| -rw-r--r-- | include/net/cfg80211.h | 5 | ||||
| -rw-r--r-- | net/mac80211/sta_info.c | 1 | ||||
| -rw-r--r-- | net/wireless/nl80211.c | 1 |
3 files changed, 7 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 96876d366c6a..ab1244075925 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -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. + */ }; /** diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 3db78b696c5c..5eaa1673a8f5 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -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); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 253e56319d7e..080fd470fdec 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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) |