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staging: ccree: fix leak of import() after init() 

crypto_ahash_import() may be called either after
crypto_ahash_init() or without such call. Right now
we always internally call init() as part of
import(), thus leaking memory and mappings if the
user has already called init() herself.

Fix this by only calling init() internally if the
state is not already initialized.

Fixes: commit 454527d0d9 ("staging: ccree: fix hash import/export")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gilad Ben-Yossef 2017-11-09 09:16:09 +00:00 committed by Greg Kroah-Hartman
parent 02d69c0359
commit c5f39d0786
1 changed files with 6 additions and 3 deletions
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9
drivers/staging/ccree/ssi_hash.c
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@ -1778,9 +1778,12 @@ static int ssi_ahash_import(struct ahash_request *req, const void *in)
}
in += sizeof(u32);
rc = ssi_hash_init(state, ctx);
if (rc)
goto out;
/* call init() to allocate bufs if the user hasn't */
if (!state->digest_buff) {
rc = ssi_hash_init(state, ctx);
if (rc)
goto out;
}
dma_sync_single_for_cpu(dev, state->digest_buff_dma_addr,
ctx->inter_digestsize, DMA_BIDIRECTIONAL);