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authorBen Hutchings <ben@decadent.org.uk>2010-08-01 17:37:03 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-08-16 15:26:38 -0400
commit1ac62ba7c985109868a18d959986425148481f47 (patch)
tree35504e08e075978f7dcdd791bdfa2fab132b778a
parenta85d7cca1204f2dba86d2f61693f0fe8c48f0fa5 (diff)
downloadop-kernel-dev-1ac62ba7c985109868a18d959986425148481f47.zip
op-kernel-dev-1ac62ba7c985109868a18d959986425148481f47.tar.gz
mac80211: Don't squash error codes in key setup functions
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>
-rw-r--r--net/mac80211/aes_ccm.c6
-rw-r--r--net/mac80211/aes_cmac.c6
-rw-r--r--net/mac80211/cfg.c4
-rw-r--r--net/mac80211/key.c14
4 files changed, 14 insertions, 16 deletions
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index a87cb3b..d2b03e0 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c
@@ -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;
}
diff --git a/net/mac80211/aes_cmac.c b/net/mac80211/aes_cmac.c
index 3d097b3..b4d66cc 100644
--- a/net/mac80211/aes_cmac.c
+++ b/net/mac80211/aes_cmac.c
@@ -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;
}
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 29ac8e1..19c6146 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -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);
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 1b9d87e..d6dbc8e 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -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);
}
}
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