From: Lv Yunlong Date: Fri, 2 Apr 2021 17:13:48 +0000 (-0700) Subject: crypto: qat - Fix a double free in adf_create_ring X-Git-Tag: v4.4.269~95 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8cbd176bf6ae5262c1e3f41459c50490b37ba698;p=thirdparty%2Fkernel%2Fstable.git crypto: qat - Fix a double free in adf_create_ring [ Upstream commit f7cae626cabb3350b23722b78fe34dd7a615ca04 ] In adf_create_ring, if the callee adf_init_ring() failed, the callee will free the ring->base_addr by dma_free_coherent() and return -EFAULT. Then adf_create_ring will goto err and the ring->base_addr will be freed again in adf_cleanup_ring(). My patch sets ring->base_addr to NULL after the first freed to avoid the double free. Fixes: a672a9dc872ec ("crypto: qat - Intel(R) QAT transport code") Signed-off-by: Lv Yunlong Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- diff --git a/drivers/crypto/qat/qat_common/adf_transport.c b/drivers/crypto/qat/qat_common/adf_transport.c index 3865ae8d96d9c..78f0942a32703 100644 --- a/drivers/crypto/qat/qat_common/adf_transport.c +++ b/drivers/crypto/qat/qat_common/adf_transport.c @@ -198,6 +198,7 @@ static int adf_init_ring(struct adf_etr_ring_data *ring) dev_err(&GET_DEV(accel_dev), "Ring address not aligned\n"); dma_free_coherent(&GET_DEV(accel_dev), ring_size_bytes, ring->base_addr, ring->dma_addr); + ring->base_addr = NULL; return -EFAULT; }