From c120e5dbfc527f94f35257eafe7769a95d79b95b Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 20 Jul 2026 11:34:21 +1000
Subject: [PATCH] crypto: ccm - Set rfc4309 maxauthsize from child

[ Upstream commit 438f4896f78f69ec73d5f32d2c024193f1223569 ]

Set the maxauthsize of rfc4309 using that of the child algorithm.

Fixes: 4a49b499dfa0 ("[CRYPTO] ccm: Added CCM mode")
Reported-by: Seohyeon Maeng <bioloidgp@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 crypto/ccm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/ccm.c b/crypto/ccm.c
index 6b815ece51c6..30c8f10408a3 100644
--- a/crypto/ccm.c
+++ b/crypto/ccm.c
@@ -753,7 +753,7 @@ static int crypto_rfc4309_create(struct crypto_template *tmpl,
 
 	inst->alg.ivsize = 8;
 	inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
-	inst->alg.maxauthsize = 16;
+	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
 
 	inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);