diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2011-07-06 21:59:39 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-07-08 11:11:19 -0400 |
| commit | aba83a0b301c32dbb91c017f33307611e1a1d384 (patch) | |
| tree | 9f8478ddf2160c9b4c50666e037e6239ea52e274 /net/mac80211/key.h | |
| parent | 523b02ea23b175dd3e46e3daf1bc9354376640a3 (diff) | |
mac80211: fix CCMP races
Since we can process multiple packets at the
same time for different ACs, but the PN is
allocated from a single counter, we need to
use an atomic value there. Use atomic64_t to
make this cheaper on 64-bit platforms, other
platforms will support this through software
emulation, see lib/atomic64.c.
We also need to use an on-stack scratch buf
so that multiple packets won't corrupt each
others scratch buffers.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/key.h')
| -rw-r--r-- | net/mac80211/key.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/net/mac80211/key.h b/net/mac80211/key.h index 1493c3e56b9f..05ce4c0203fc 100644 --- a/net/mac80211/key.h +++ b/net/mac80211/key.h @@ -82,7 +82,7 @@ struct ieee80211_key { struct tkip_ctx rx[NUM_RX_DATA_QUEUES]; } tkip; struct { - u8 tx_pn[6]; + atomic64_t tx_pn; /* * Last received packet number. The first * NUM_RX_DATA_QUEUES counters are used with Data @@ -92,12 +92,9 @@ struct ieee80211_key { u8 rx_pn[NUM_RX_DATA_QUEUES + 1][6]; struct crypto_cipher *tfm; u32 replays; /* dot11RSNAStatsCCMPReplays */ - /* scratch buffers for virt_to_page() (crypto API) */ #ifndef AES_BLOCK_LEN #define AES_BLOCK_LEN 16 #endif - u8 tx_crypto_buf[6 * AES_BLOCK_LEN]; - u8 rx_crypto_buf[6 * AES_BLOCK_LEN]; } ccmp; struct { u8 tx_pn[6]; |