linux-kernel - [PATCH 5.1 072/155] vfio-pci/nvlink2: Fix potential VMA leak

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Message-Id: <20190613075657.001361799@linuxfoundation.org>
Date:   Thu, 13 Jun 2019 10:33:04 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Greg Kurz <groug@...d.org>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Alex Williamson <alex.williamson@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.1 072/155] vfio-pci/nvlink2: Fix potential VMA leak

[ Upstream commit 2c85f2bd519457073444ec28bbb4743a4e4237a7 ]

If vfio_pci_register_dev_region() fails then we should rollback
previous changes, ie. unmap the ATSD registers.

Fixes: 7f92891778df ("vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver")
Signed-off-by: Greg Kurz <groug@...d.org>
Reviewed-by: Alexey Kardashevskiy <aik@...abs.ru>
Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/vfio/pci/vfio_pci_nvlink2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/vfio/pci/vfio_pci_nvlink2.c b/drivers/vfio/pci/vfio_pci_nvlink2.c
index 32f695ffe128..50fe3c4f7feb 100644
--- a/drivers/vfio/pci/vfio_pci_nvlink2.c
+++ b/drivers/vfio/pci/vfio_pci_nvlink2.c
@@ -472,6 +472,8 @@ int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev)
 	return 0;
 
 free_exit:
+	if (data->base)
+		memunmap(data->base);
 	kfree(data);
 
 	return ret;
-- 
2.20.1