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crypto: drbg - fix freeing of resources 

During the change to use aligned buffers, the deallocation code path was
not updated correctly. The current code tries to free the aligned buffer
pointer and not the original buffer pointer as it is supposed to.

Thus, the code is updated to free the original buffer pointer and set
the aligned buffer pointer that is used throughout the code to NULL.

Fixes: 3cfc3b9721 ("crypto: drbg - use aligned buffers")
CC: <stable@vger.kernel.org>
CC: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Stephan Mueller 2017-09-14 17:10:28 +02:00 committed by Herbert Xu
parent 2bd6bf03f4
commit bd6227a150
1 changed files with 4 additions and 4 deletions
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8
crypto/drbg.c
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@ -1133,10 +1133,10 @@ static inline void drbg_dealloc_state(struct drbg_state *drbg)
{
if (!drbg)
return;
kzfree(drbg->V);
drbg->Vbuf = NULL;
kzfree(drbg->C);
drbg->Cbuf = NULL;
kzfree(drbg->Vbuf);
drbg->V = NULL;
kzfree(drbg->Cbuf);
drbg->C = NULL;
kzfree(drbg->scratchpadbuf);
drbg->scratchpadbuf = NULL;
drbg->reseed_ctr = 0;