From 088c87262bbc39a01ebcd70817d35616785908b1 Mon Sep 17 00:00:00 2001 From: "John W. Linville" Date: Thu, 15 Jul 2010 16:16:17 -0400 Subject: [PATCH] mac80211: improve error checking if WEP fails to init Do this by poisoning the values of wep_tx_tfm and wep_rx_tfm if either crypto allocation fails. Reported-by: Stanislaw Gruszka Signed-off-by: John W. Linville --- net/mac80211/wep.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/net/mac80211/wep.c b/net/mac80211/wep.c index 6d133b6efce5..9ebc8d8a1f5b 100644 --- a/net/mac80211/wep.c +++ b/net/mac80211/wep.c @@ -32,13 +32,16 @@ int ieee80211_wep_init(struct ieee80211_local *local) local->wep_tx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC); - if (IS_ERR(local->wep_tx_tfm)) + if (IS_ERR(local->wep_tx_tfm)) { + local->wep_rx_tfm = ERR_PTR(-EINVAL); return PTR_ERR(local->wep_tx_tfm); + } local->wep_rx_tfm = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC); if (IS_ERR(local->wep_rx_tfm)) { crypto_free_blkcipher(local->wep_tx_tfm); + local->wep_tx_tfm = ERR_PTR(-EINVAL); return PTR_ERR(local->wep_rx_tfm); } -- 2.39.5