From 73af07de3e32b9ac328c3d1417258bb98a9b0a9b Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Sun, 24 Sep 2006 09:30:19 +1000 Subject: [CRYPTO] hmac: Fix error truncation by unlikely() The error return values are truncated by unlikely so we need to save it first. Thanks to Kyle Moffett for spotting this. Signed-off-by: Herbert Xu Signed-off-by: Linus Torvalds --- crypto/hmac.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) (limited to 'crypto/hmac.c') diff --git a/crypto/hmac.c b/crypto/hmac.c index d52b234835cf..b521bcd2b2c6 100644 --- a/crypto/hmac.c +++ b/crypto/hmac.c @@ -92,13 +92,17 @@ static int hmac_init(struct hash_desc *pdesc) struct hmac_ctx *ctx = align_ptr(ipad + bs * 2 + ds, sizeof(void *)); struct hash_desc desc; struct scatterlist tmp; + int err; desc.tfm = ctx->child; desc.flags = pdesc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; sg_set_buf(&tmp, ipad, bs); - return unlikely(crypto_hash_init(&desc)) ?: - crypto_hash_update(&desc, &tmp, bs); + err = crypto_hash_init(&desc); + if (unlikely(err)) + return err; + + return crypto_hash_update(&desc, &tmp, bs); } static int hmac_update(struct hash_desc *pdesc, @@ -123,13 +127,17 @@ static int hmac_final(struct hash_desc *pdesc, u8 *out) struct hmac_ctx *ctx = align_ptr(digest + ds, sizeof(void *)); struct hash_desc desc; struct scatterlist tmp; + int err; desc.tfm = ctx->child; desc.flags = pdesc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; sg_set_buf(&tmp, opad, bs + ds); - return unlikely(crypto_hash_final(&desc, digest)) ?: - crypto_hash_digest(&desc, &tmp, bs + ds, out); + err = crypto_hash_final(&desc, digest); + if (unlikely(err)) + return err; + + return crypto_hash_digest(&desc, &tmp, bs + ds, out); } static int hmac_digest(struct hash_desc *pdesc, struct scatterlist *sg, @@ -145,6 +153,7 @@ static int hmac_digest(struct hash_desc *pdesc, struct scatterlist *sg, struct hash_desc desc; struct scatterlist sg1[2]; struct scatterlist sg2[1]; + int err; desc.tfm = ctx->child; desc.flags = pdesc->flags & CRYPTO_TFM_REQ_MAY_SLEEP; @@ -154,8 +163,11 @@ static int hmac_digest(struct hash_desc *pdesc, struct scatterlist *sg, sg1[1].length = 0; sg_set_buf(sg2, opad, bs + ds); - return unlikely(crypto_hash_digest(&desc, sg1, nbytes + bs, digest)) ?: - crypto_hash_digest(&desc, sg2, bs + ds, out); + err = crypto_hash_digest(&desc, sg1, nbytes + bs, digest); + if (unlikely(err)) + return err; + + return crypto_hash_digest(&desc, sg2, bs + ds, out); } static int hmac_init_tfm(struct crypto_tfm *tfm) -- cgit v1.2.3-58-ga151