linux-kernel - [PATCH AUTOSEL 4.4 32/40] vfio/pci: Fix potential memory leak in vfio_msi_cap

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Message-Id: <20191110025032.827-32-sashal@kernel.org>
Date:   Sat,  9 Nov 2019 21:50:24 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Li Qiang <liq3ea@...il.com>, Eric Auger <eric.auger@...hat.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Sasha Levin <sashal@...nel.org>, kvm@...r.kernel.org
Subject: [PATCH AUTOSEL 4.4 32/40] vfio/pci: Fix potential memory leak in vfio_msi_cap_len

From: Li Qiang <liq3ea@...il.com>

[ Upstream commit 30ea32ab1951c80c6113f300fce2c70cd12659e4 ]

Free allocated vdev->msi_perm in error path.

Signed-off-by: Li Qiang <liq3ea@...il.com>
Reviewed-by: Eric Auger <eric.auger@...hat.com>
Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/vfio/pci/vfio_pci_config.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index c55c632a3b249..ad5929fbceb16 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -1130,8 +1130,10 @@ static int vfio_msi_cap_len(struct vfio_pci_device *vdev, u8 pos)
 		return -ENOMEM;
 
 	ret = init_pci_cap_msi_perm(vdev->msi_perm, len, flags);
-	if (ret)
+	if (ret) {
+		kfree(vdev->msi_perm);
 		return ret;
+	}
 
 	return len;
 }
-- 
2.20.1