diff mbox series

[5.12,285/677] crypto: qat - Fix a double free in adf_create_ring

Message ID 20210512144846.680338710@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH May 12, 2021, 2:45 p.m. UTC 
From: Lv Yunlong <lyl2019@mail.ustc.edu.cn>

[ 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 <lyl2019@mail.ustc.edu.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/qat/qat_common/adf_transport.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/crypto/qat/qat_common/adf_transport.c b/drivers/crypto/qat/qat_common/adf_transport.c
index 888c1e047295..8ba28409fb74 100644
--- a/drivers/crypto/qat/qat_common/adf_transport.c
+++ b/drivers/crypto/qat/qat_common/adf_transport.c
@@ -172,6 +172,7 @@  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;
 	}