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[CRYPTO] cipher: Align temporary buffer in cbc_process_decrypt 

Since the temporary buffer is used as an argument to cia_decrypt, it must be
aligned by cra_alignmask.  This bug was found by linux@horizon.com.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2005-11-29 22:04:41 +11:00 committed by David S. Miller
parent fa9b98fdab
commit 827c3911d8
1 changed files with 3 additions and 2 deletions
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5
crypto/cipher.c
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@ -212,9 +212,10 @@ static unsigned int cbc_process_decrypt(const struct cipher_desc *desc,
struct crypto_tfm *tfm = desc->tfm; struct crypto_tfm *tfm = desc->tfm;
void (*xor)(u8 *, const u8 *) = tfm->crt_u.cipher.cit_xor_block; void (*xor)(u8 *, const u8 *) = tfm->crt_u.cipher.cit_xor_block;
int bsize = crypto_tfm_alg_blocksize(tfm); int bsize = crypto_tfm_alg_blocksize(tfm);
unsigned long alignmask = crypto_tfm_alg_alignmask(desc->tfm);
u8 stack[src == dst ? bsize : 0]; u8 stack[src == dst ? bsize + alignmask : 0];
u8 *buf = stack; u8 *buf = (u8 *)ALIGN((unsigned long)stack, alignmask + 1);
u8 **dst_p = src == dst ? &buf : &dst; u8 **dst_p = src == dst ? &buf : &dst;
void (*fn)(void *, u8 *, const u8 *) = desc->crfn; void (*fn)(void *, u8 *, const u8 *) = desc->crfn;