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| author | Eric Biggers <ebiggers@google.com> | 2022-12-20 06:40:40 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-12-30 10:57:42 +0100 |
| commit | 116db2704c193fff6d73ea6c2219625f0c9bdfc8 (patch) | |
| tree | 353320f16e49bceebcff8197a75ede8294bfef47 /arch/x86/crypto/ghash-clmulni-intel_glue.c | |
| parent | crypto: arm64/sm4 - fix possible crash with CFI enabled (diff) | |
| download | linux-116db2704c193fff6d73ea6c2219625f0c9bdfc8.tar.xz linux-116db2704c193fff6d73ea6c2219625f0c9bdfc8.zip | |
crypto: x86/ghash - fix unaligned access in ghash_setkey()
The key can be unaligned, so use the unaligned memory access helpers.
Fixes: 8ceee72808d1 ("crypto: ghash-clmulni-intel - use C implementation for setkey()")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/x86/crypto/ghash-clmulni-intel_glue.c')
| -rw-r--r-- | arch/x86/crypto/ghash-clmulni-intel_glue.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/crypto/ghash-clmulni-intel_glue.c b/arch/x86/crypto/ghash-clmulni-intel_glue.c index 1f1a95f3dd0c..c0ab0ff4af65 100644 --- a/arch/x86/crypto/ghash-clmulni-intel_glue.c +++ b/arch/x86/crypto/ghash-clmulni-intel_glue.c @@ -19,6 +19,7 @@ #include <crypto/internal/simd.h> #include <asm/cpu_device_id.h> #include <asm/simd.h> +#include <asm/unaligned.h> #define GHASH_BLOCK_SIZE 16 #define GHASH_DIGEST_SIZE 16 @@ -54,15 +55,14 @@ static int ghash_setkey(struct crypto_shash *tfm, const u8 *key, unsigned int keylen) { struct ghash_ctx *ctx = crypto_shash_ctx(tfm); - be128 *x = (be128 *)key; u64 a, b; if (keylen != GHASH_BLOCK_SIZE) return -EINVAL; /* perform multiplication by 'x' in GF(2^128) */ - a = be64_to_cpu(x->a); - b = be64_to_cpu(x->b); + a = get_unaligned_be64(key); + b = get_unaligned_be64(key + 8); ctx->shash.a = (b << 1) | (a >> 63); ctx->shash.b = (a << 1) | (b >> 63); |