From 32bec973a8435afc0b032da22174701f836549b2 Mon Sep 17 00:00:00 2001 From: Jussi Kivilinna Date: Thu, 18 Oct 2012 23:24:57 +0300 Subject: [PATCH] crypto: aesni - fix XTS mode on x86-32, add wrapper function for asmlinkage aesni_enc() Calling convention for internal functions and 'asmlinkage' functions is different on x86-32. Therefore do not directly cast aesni_enc as XTS tweak function, but use wrapper function in between. Fixes crash with "XTS + aesni_intel + x86-32" combination. Cc: stable@vger.kernel.org Reported-by: Krzysztof Kolasa Signed-off-by: Jussi Kivilinna Acked-by: David S. Miller Signed-off-by: Linus Torvalds --- arch/x86/crypto/aesni-intel_glue.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c index 7c04d0d..1b9c22b 100644 --- a/arch/x86/crypto/aesni-intel_glue.c +++ b/arch/x86/crypto/aesni-intel_glue.c @@ -515,6 +515,11 @@ static int xts_aesni_setkey(struct crypto_tfm *tfm, const u8 *key, } +static void aesni_xts_tweak(void *ctx, u8 *out, const u8 *in) +{ + aesni_enc(ctx, out, in); +} + static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes) { @@ -525,7 +530,7 @@ static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, .tbuflen = sizeof(buf), .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx), - .tweak_fn = XTS_TWEAK_CAST(aesni_enc), + .tweak_fn = aesni_xts_tweak, .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx), .crypt_fn = lrw_xts_encrypt_callback, }; @@ -550,7 +555,7 @@ static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, .tbuflen = sizeof(buf), .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx), - .tweak_fn = XTS_TWEAK_CAST(aesni_enc), + .tweak_fn = aesni_xts_tweak, .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx), .crypt_fn = lrw_xts_decrypt_callback, }; -- 2.7.4