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staging: ccree: NULLify backup_info when unused

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backup_info field is only allocated for decrypt code path.
The field was not nullified when not used causing a kfree
in an error handling path to attempt to free random
addresses as uncovered in stress testing.

Fixes: 737aed947f ("staging: ccree: save ciphertext for CTS IV")
Cc: stable@vger.kernel.org
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gilad Ben-Yossef 2017-12-03 13:58:19 +00:00 committed by Greg Kroah-Hartman
parent 0d527ecc48
commit 46df882498
1 changed files with 1 additions and 0 deletions
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drivers/staging/ccree/ssi_cipher.c
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@ -907,6 +907,7 @@ static int ssi_ablkcipher_encrypt(struct ablkcipher_request *req)
unsigned int ivsize = crypto_ablkcipher_ivsize(ablk_tfm);
req_ctx->is_giv = false;
req_ctx->backup_info = NULL;
return ssi_blkcipher_process(tfm, req_ctx, req->dst, req->src,
req->nbytes, req->info, ivsize,