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authorJohannes Berg <johannes.berg@intel.com>2012-11-29 01:25:20 +0100
committerJohannes Berg <johannes.berg@intel.com>2012-11-30 13:42:20 +0100
commit9caf03640279e64d0ba36539b42daa1b43a49486 (patch)
treecb094a4a577f61421d1b402e16f0e68f151d5726 /net/wireless/reg.c
parentb9a9ada14aab17f08c1d9735601f1097cdcfc6de (diff)
downloadlinux-9caf03640279e64d0ba36539b42daa1b43a49486.tar.bz2
cfg80211: fix BSS struct IE access races
When a BSS struct is updated, the IEs are currently overwritten or freed. This can lead to races if some other CPU is accessing the BSS struct and using the IEs concurrently. Fix this by always allocating the IEs in a new struct that holds the data and length and protecting access to this new struct with RCU. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/reg.c')
-rw-r--r--net/wireless/reg.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index bcc7d7ee5a51..b6c7ea6d98f8 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1797,7 +1797,7 @@ EXPORT_SYMBOL(regulatory_hint);
*/
void regulatory_hint_11d(struct wiphy *wiphy,
enum ieee80211_band band,
- u8 *country_ie,
+ const u8 *country_ie,
u8 country_ie_len)
{
char alpha2[2];