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authorHerbert Xu <herbert@gondor.apana.org.au>2005-11-29 11:04:41 (GMT)
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-09 22:15:49 (GMT)
commit827c3911d8551842900f44c9a139382bcae68e6e (patch)
tree94a273158e4e343ac71cab555ff32477dad61431 /crypto/cipher.c
parentfa9b98fdab5b57ecb4dd3d6c2489e262af458c44 (diff)
[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>
Diffstat (limited to 'crypto/cipher.c')
-rw-r--r--crypto/cipher.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/crypto/cipher.c b/crypto/cipher.c
index dfd4bcf..65bcea0 100644
--- a/crypto/cipher.c
+++ b/crypto/cipher.c
@@ -212,9 +212,10 @@ static unsigned int cbc_process_decrypt(const struct cipher_desc *desc,
struct crypto_tfm *tfm = desc->tfm;
void (*xor)(u8 *, const u8 *) = tfm->crt_u.cipher.cit_xor_block;
int bsize = crypto_tfm_alg_blocksize(tfm);
+ unsigned long alignmask = crypto_tfm_alg_alignmask(desc->tfm);
- u8 stack[src == dst ? bsize : 0];
- u8 *buf = stack;
+ u8 stack[src == dst ? bsize + alignmask : 0];
+ u8 *buf = (u8 *)ALIGN((unsigned long)stack, alignmask + 1);
u8 **dst_p = src == dst ? &buf : &dst;
void (*fn)(void *, u8 *, const u8 *) = desc->crfn;

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