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mac80211: Don't squash error codes in key setup functions

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ieee80211_add_key() currently returns -ENOMEM in case of any error,
including a missing crypto algorithm.  Change ieee80211_key_alloc()
and ieee80211_aes_{key_setup_encrypt,cmac_key_setup}() to encode
errors with ERR_PTR() rather than returning NULL, and change
ieee80211_add_key() accordingly.

Compile-tested only.

Reported-by: Marcin Owsiany <porridge@debian.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ben Hutchings 2010-08-01 17:37:03 +01:00 committed by John W. Linville
parent a85d7cca12
commit 1ac62ba7c9
4 changed files with 14 additions and 16 deletions
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6
net/mac80211/aes_ccm.c
View File

@ -138,10 +138,8 @@ struct crypto_cipher *ieee80211_aes_key_setup_encrypt(const u8 key[])
struct crypto_cipher *tfm;
tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm))
return NULL;
crypto_cipher_setkey(tfm, key, ALG_CCMP_KEY_LEN);
if (!IS_ERR(tfm))
crypto_cipher_setkey(tfm, key, ALG_CCMP_KEY_LEN);
return tfm;
}

6
net/mac80211/aes_cmac.c
View File

@ -119,10 +119,8 @@ struct crypto_cipher * ieee80211_aes_cmac_key_setup(const u8 key[])
struct crypto_cipher *tfm;
tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm))
return NULL;
crypto_cipher_setkey(tfm, key, AES_CMAC_KEY_LEN);
if (!IS_ERR(tfm))
crypto_cipher_setkey(tfm, key, AES_CMAC_KEY_LEN);
return tfm;
}

4
net/mac80211/cfg.c
View File

@ -150,8 +150,8 @@ static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,
key = ieee80211_key_alloc(alg, key_idx, params->key_len, params->key,
params->seq_len, params->seq);
if (!key)
return -ENOMEM;
if (IS_ERR(key))
return PTR_ERR(key);
mutex_lock(&sdata->local->sta_mtx);

14
net/mac80211/key.c
View File

@ -234,13 +234,13 @@ struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
size_t seq_len, const u8 *seq)
{
struct ieee80211_key *key;
int i, j;
int i, j, err;
BUG_ON(idx < 0 || idx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS);
key = kzalloc(sizeof(struct ieee80211_key) + key_len, GFP_KERNEL);
if (!key)
return NULL;
return ERR_PTR(-ENOMEM);
/*
* Default to software encryption; we'll later upload the
@ -296,9 +296,10 @@ struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
* it does not need to be initialized for every packet.
*/
key->u.ccmp.tfm = ieee80211_aes_key_setup_encrypt(key_data);
if (!key->u.ccmp.tfm) {
if (IS_ERR(key->u.ccmp.tfm)) {
err = PTR_ERR(key->u.ccmp.tfm);
kfree(key);
return NULL;
key = ERR_PTR(err);
}
}
@ -309,9 +310,10 @@ struct ieee80211_key *ieee80211_key_alloc(enum ieee80211_key_alg alg,
*/
key->u.aes_cmac.tfm =
ieee80211_aes_cmac_key_setup(key_data);
if (!key->u.aes_cmac.tfm) {
if (IS_ERR(key->u.aes_cmac.tfm)) {
err = PTR_ERR(key->u.aes_cmac.tfm);
kfree(key);
return NULL;
key = ERR_PTR(err);
}
}