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stating: ccree: revert "staging: ccree: fix leak of import() after init()"

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commit 293edc27f8 upstream

This reverts commit c5f39d0786 ("staging: ccree: fix leak of import()
after init()") and commit aece090244 ("staging: ccree: Uninitialized
return in ssi_ahash_import()").

This is the wrong solution and ends up relying on uninitialized memory,
although it was not obvious to me at the time.

Cc: stable@vger.kernel.org
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gilad Ben-Yossef
2018-01-07 12:14:22 +00:00
committed by Greg Kroah-Hartman
parent 56dbdae0c4
commit 83b4ccf2ae
1 changed files with 4 additions and 7 deletions
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11
drivers/staging/ccree/ssi_hash.c
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@@ -1781,7 +1781,7 @@ static int ssi_ahash_import(struct ahash_request *req, const void *in)
struct device *dev = &ctx->drvdata->plat_dev->dev;
struct ahash_req_ctx *state = ahash_request_ctx(req);
u32 tmp;
int rc = 0;
int rc;
memcpy(&tmp, in, sizeof(u32));
if (tmp != CC_EXPORT_MAGIC) {
@@ -1790,12 +1790,9 @@ static int ssi_ahash_import(struct ahash_request *req, const void *in)
}
in += sizeof(u32);
/* call init() to allocate bufs if the user hasn't */
if (!state->digest_buff) {
rc = ssi_hash_init(state, ctx);
if (rc)
goto out;
}
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);