virt/sev-guest: Remove unnecessary free in init_crypto()

If the memory allocation for the auth tag fails, then there is no need
to free it.

Fixes: fce96cf ("virt: Add SEV-SNP guest driver")
Signed-off-by: Rafael Mendonca <rafaelmendsr@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20221018015425.887891-1-rafaelmendsr@gmail.com

Author: rafaelmsoares

drivers/virt/coco/sev-guest/sev-guest.c

@@ -152,12 +152,10 @@ static struct snp_guest_crypto *init_crypto(struct snp_guest_dev *snp_dev, u8 *k
 	crypto->a_len = crypto_aead_authsize(crypto->tfm);
 	crypto->authtag = kmalloc(crypto->a_len, GFP_KERNEL_ACCOUNT);
 	if (!crypto->authtag)
-		goto e_free_auth;
+		goto e_free_iv;
 
 	return crypto;
 
-e_free_auth:
-	kfree(crypto->authtag);
 e_free_iv:
 	kfree(crypto->iv);
 e_free_crypto: