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mac80211: Allocate a sync skcipher explicitly for FILS AEAD 

The skcipher could have been of the async variant which may return from
skcipher_encrypt() with -EINPROGRESS after having queued the request.
The FILS AEAD implementation here does not have code for dealing with
that possibility, so allocate a sync cipher explicitly to avoid
potential issues with hardware accelerators.

This is based on the patch sent out by Ard.

Fixes: 39404feee6 ("mac80211: FILS AEAD protection for station mode association frames")
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Jouni Malinen 2017-02-04 18:08:42 +02:00 committed by Johannes Berg
parent e479ab651f
commit 01fba20b59
1 changed files with 2 additions and 2 deletions
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4
net/mac80211/fils_aead.c
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@ -124,7 +124,7 @@ static int aes_siv_encrypt(const u8 *key, size_t key_len,
/* CTR */
tfm2 = crypto_alloc_skcipher("ctr(aes)", 0, 0);
tfm2 = crypto_alloc_skcipher("ctr(aes)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm2)) {
kfree(tmp);
return PTR_ERR(tfm2);
@ -183,7 +183,7 @@ static int aes_siv_decrypt(const u8 *key, size_t key_len,
/* CTR */
tfm2 = crypto_alloc_skcipher("ctr(aes)", 0, 0);
tfm2 = crypto_alloc_skcipher("ctr(aes)", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm2))
return PTR_ERR(tfm2);
/* K2 for CTR */