4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Felix Fietkau <n...@nbd.name>
commit 6fe04128f158c5ad27e7504bfdf1b12e63331bc9 upstream.
The header field is defined as u8[] but also accessed as struct
ieee80211_hdr. Enforce an alignment of 2 to prevent unnecessary
unaligned accesses, which can be very harmful for performance on many
platforms.
Fixes: e495c24731a2 ("mac80211: extend fast-xmit for more ciphers")
Signed-off-by: Felix Fietkau <n...@nbd.name>
Signed-off-by: Johannes Berg <johannes.b...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/mac80211/sta_info.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -269,7 +269,7 @@ struct ieee80211_fast_tx {
u8 sa_offs, da_offs, pn_offs;
u8 band;
u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
- sizeof(rfc1042_header)];
+ sizeof(rfc1042_header)] __aligned(2);
struct rcu_head rcu_head;
};
