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mac80211: improve error checking if WEP fails to init

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Do this by poisoning the values of wep_tx_tfm and wep_rx_tfm if either
crypto allocation fails.

Reported-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
John W. Linville 2010-07-15 16:16:17 -04:00
parent 48d5548fc5
commit 088c87262b
1 changed files with 4 additions and 1 deletions
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5
net/mac80211/wep.c
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@ -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);
}