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mac80211: aes_cmac: check crypto_shash_setkey() return value 

As crypto_shash_setkey() can fail, we should check the return value.

Addresses-Coverity-ID: 1401813 ("Unchecked return value")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210409123755.533ff7acf1d2.I034bafa201c4a6823333f8410aeaa60cca5ee9e0@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2021-04-09 12:40:28 +03:00
parent bab7f5ca81
commit 8de8570489
1 changed files with 9 additions and 2 deletions
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11
net/mac80211/aes_cmac.c
View File

@ -2,6 +2,7 @@
/*
* AES-128-CMAC with TLen 16 for IEEE 802.11w BIP
* Copyright 2008, Jouni Malinen <j@w1.fi>
* Copyright (C) 2020 Intel Corporation
*/
#include <linux/kernel.h>
@ -73,8 +74,14 @@ struct crypto_shash *ieee80211_aes_cmac_key_setup(const u8 key[],
struct crypto_shash *tfm;
tfm = crypto_alloc_shash("cmac(aes)", 0, 0);
if (!IS_ERR(tfm))
crypto_shash_setkey(tfm, key, key_len);
if (!IS_ERR(tfm)) {
int err = crypto_shash_setkey(tfm, key, key_len);
if (err) {
crypto_free_shash(tfm);
return ERR_PTR(err);
}
}
return tfm;
}