5.4-stable review patch. If anyone has any objections, please let me know.
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From: Herbert Xu herbert@gondor.apana.org.au
[ Upstream commit 6bb73db6948c2de23e407fe1b7ef94bf02b7529f ]
Move the ssize check to the start in essiv_aead_crypt so that it's also checked for decryption and in-place encryption.
Reported-by: Muhammad Alifa Ramdhan ramdhan@starlabs.sg Fixes: be1eb7f78aa8 ("crypto: essiv - create wrapper template for ESSIV generation") Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- crypto/essiv.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/crypto/essiv.c b/crypto/essiv.c index aa6b89e91ac80..8a74cc34ac50a 100644 --- a/crypto/essiv.c +++ b/crypto/essiv.c @@ -203,9 +203,14 @@ static int essiv_aead_crypt(struct aead_request *req, bool enc) const struct essiv_tfm_ctx *tctx = crypto_aead_ctx(tfm); struct essiv_aead_request_ctx *rctx = aead_request_ctx(req); struct aead_request *subreq = &rctx->aead_req; + int ivsize = crypto_aead_ivsize(tfm); + int ssize = req->assoclen - ivsize; struct scatterlist *src = req->src; int err;
+ if (ssize < 0) + return -EINVAL; + crypto_cipher_encrypt_one(tctx->essiv_cipher, req->iv, req->iv);
/* @@ -215,19 +220,12 @@ static int essiv_aead_crypt(struct aead_request *req, bool enc) */ rctx->assoc = NULL; if (req->src == req->dst || !enc) { - scatterwalk_map_and_copy(req->iv, req->dst, - req->assoclen - crypto_aead_ivsize(tfm), - crypto_aead_ivsize(tfm), 1); + scatterwalk_map_and_copy(req->iv, req->dst, ssize, ivsize, 1); } else { u8 *iv = (u8 *)aead_request_ctx(req) + tctx->ivoffset; - int ivsize = crypto_aead_ivsize(tfm); - int ssize = req->assoclen - ivsize; struct scatterlist *sg; int nents;
- if (ssize < 0) - return -EINVAL; - nents = sg_nents_for_len(req->src, ssize); if (nents < 0) return -EINVAL;