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From: Eric Biggers <ebiggers@kernel.org>
To: linux-crypto@vger.kernel.org, Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ard Biesheuvel <ardb@kernel.org>
Subject: [PATCH] crypto: x86/chacha - only unregister algorithms if registered
Date: Sun, 17 Nov 2019 23:21:58 -0800	[thread overview]
Message-ID: <20191118072158.467616-1-ebiggers@kernel.org> (raw)

From: Eric Biggers <ebiggers@google.com>

It's not valid to call crypto_unregister_skciphers() without a prior
call to crypto_register_skciphers().

Fixes: 84e03fa39fbe ("crypto: x86/chacha - expose SIMD ChaCha routine as library function")
Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 arch/x86/crypto/chacha_glue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/crypto/chacha_glue.c b/arch/x86/crypto/chacha_glue.c
index b391e13a9e41..a94e30b6f941 100644
--- a/arch/x86/crypto/chacha_glue.c
+++ b/arch/x86/crypto/chacha_glue.c
@@ -304,7 +304,8 @@ static int __init chacha_simd_mod_init(void)
 
 static void __exit chacha_simd_mod_fini(void)
 {
-	crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
+	if (boot_cpu_has(X86_FEATURE_SSSE3))
+		crypto_unregister_skciphers(algs, ARRAY_SIZE(algs));
 }
 
 module_init(chacha_simd_mod_init);
-- 
2.24.0


             reply	other threads:[~2019-11-18  7:22 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18  7:21 Eric Biggers [this message]
2019-11-18  7:26 ` [PATCH] crypto: x86/chacha - only unregister algorithms if registered Ard Biesheuvel
2019-11-22 11:10 ` Herbert Xu

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