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| author | Kalle Valo <kalle.valo@iki.fi> | 2010-01-23 20:27:14 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2010-01-23 16:47:00 -0500 |
| commit | 3b43a18743421cccd33902e29016fa49b2d52dbb (patch) | |
| tree | eaaab22a16260625854a51076fe64d5787e98ac4 /net | |
| parent | f12553ebe045a8a40ab33fa500fb57d10706e226 (diff) | |
| download | linux-3b43a18743421cccd33902e29016fa49b2d52dbb.tar.gz linux-3b43a18743421cccd33902e29016fa49b2d52dbb.tar.bz2 linux-3b43a18743421cccd33902e29016fa49b2d52dbb.zip | |
mac80211: fix tx select key null pointer crash with hostapd
Pavel Roskin reported a crash in ieee80211_tx_h_select_key():
http://marc.info/?l=linux-wireless&m=126419655108528&w=2
This is a regression from patch "mac80211: move control.hw_key assignment".
Fix it as suggested by Johannes, adding an else statement to make sure
that tx->key is not accessed when it's null.
Compile-tested only.
Reported-by: Pavel Roskin <proski@gnu.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Kalle Valo <kalle.valo@iki.fi>
Tested-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/tx.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index fcfa988a37a3..d017b3530d4d 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -547,9 +547,10 @@ ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx) !ieee80211_use_mfp(hdr->frame_control, tx->sta, tx->skb)) tx->key = NULL; - skip_hw = (tx->key->conf.flags & - IEEE80211_KEY_FLAG_SW_MGMT) && - ieee80211_is_mgmt(hdr->frame_control); + else + skip_hw = (tx->key->conf.flags & + IEEE80211_KEY_FLAG_SW_MGMT) && + ieee80211_is_mgmt(hdr->frame_control); break; case ALG_AES_CMAC: if (!ieee80211_is_mgmt(hdr->frame_control)) |