diff options
| author | Christian Lamparter <chunkeey@gmail.com> | 2019-10-31 17:14:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-13 08:43:04 +0100 |
| commit | 1e863b723ee08ecf0ec650a34a94cd54a232bfde (patch) | |
| tree | 6edc9f8fe5ea2f1a0c207934c31260a77e6150eb | |
| parent | d61ce964332add7ea55ac41173000f3527a25e1f (diff) | |
crypto: crypto4xx - fix double-free in crypto4xx_destroy_sdr
commit 746c908c4d72e49068ab216c3926d2720d71a90d upstream.
This patch fixes a crash that can happen during probe
when the available dma memory is not enough (this can
happen if the crypto4xx is built as a module).
The descriptor window mapping would end up being free'd
twice, once in crypto4xx_build_pdr() and the second time
in crypto4xx_destroy_sdr().
Fixes: 5d59ad6eea82 ("crypto: crypto4xx - fix crypto4xx_build_pdr, crypto4xx_build_sdr leak")
Cc: <stable@vger.kernel.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/crypto/amcc/crypto4xx_core.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/crypto/amcc/crypto4xx_core.c b/drivers/crypto/amcc/crypto4xx_core.c index de5e9352e920..7d6b695c4ab3 100644 --- a/drivers/crypto/amcc/crypto4xx_core.c +++ b/drivers/crypto/amcc/crypto4xx_core.c @@ -365,12 +365,8 @@ static u32 crypto4xx_build_sdr(struct crypto4xx_device *dev) dma_alloc_coherent(dev->core_dev->device, PPC4XX_SD_BUFFER_SIZE * PPC4XX_NUM_SD, &dev->scatter_buffer_pa, GFP_ATOMIC); - if (!dev->scatter_buffer_va) { - dma_free_coherent(dev->core_dev->device, - sizeof(struct ce_sd) * PPC4XX_NUM_SD, - dev->sdr, dev->sdr_pa); + if (!dev->scatter_buffer_va) return -ENOMEM; - } for (i = 0; i < PPC4XX_NUM_SD; i++) { dev->sdr[i].ptr = dev->scatter_buffer_pa + |