Commit 8ade538bf39b ("mac80111: Add BIP-GMAC-128 and BIP-GMAC-256
ciphers") had the success return in incorrect place before the
crypto_aead_setauthsize() call which practically ended up skipping that
call unconditionally.

The missing call did not actually change any functionality since
GMAC_MIC_LEN (16) is identical to the maxauthsize in gcm(aes) and as
such, the default value used for the authsize parameter.

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Jouni Malinen <[email protected]>
---
 net/mac80211/aes_gmac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/mac80211/aes_gmac.c b/net/mac80211/aes_gmac.c
index 1c72edc..f1321b7 100644
--- a/net/mac80211/aes_gmac.c
+++ b/net/mac80211/aes_gmac.c
@@ -69,10 +69,10 @@ struct crypto_aead *ieee80211_aes_gmac_key_setup(const u8 
key[],
                return tfm;
 
        err = crypto_aead_setkey(tfm, key, key_len);
-       if (!err)
-               return tfm;
        if (!err)
                err = crypto_aead_setauthsize(tfm, GMAC_MIC_LEN);
+       if (!err)
+               return tfm;
 
        crypto_free_aead(tfm);
        return ERR_PTR(err);
-- 
1.9.1

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