linux-kernel - [PATCH 5.10 012/252] iommu/vt-d: Fix sysfs leak in alloc

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Message-Id: <20210531130658.395395581@linuxfoundation.org>
Date:   Mon, 31 May 2021 15:11:17 +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, Rolf Eike Beer <eb@...ix.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 5.10 012/252] iommu/vt-d: Fix sysfs leak in alloc_iommu()

From: Rolf Eike Beer <eb@...ix.com>

commit 0ee74d5a48635c848c20f152d0d488bf84641304 upstream.

iommu_device_sysfs_add() is called before, so is has to be cleaned on subsequent
errors.

Fixes: 39ab9555c2411 ("iommu: Add sysfs bindings for struct iommu_device")
Cc: stable@...r.kernel.org # 4.11.x
Signed-off-by: Rolf Eike Beer <eb@...ix.com>
Acked-by: Lu Baolu <baolu.lu@...ux.intel.com>
Link: https://lore.kernel.org/r/17411490.HIIP88n32C@mobilepool36.emlix.com
Link: https://lore.kernel.org/r/20210525070802.361755-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/iommu/intel/dmar.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1137,7 +1137,7 @@ static int alloc_iommu(struct dmar_drhd_
 
 		err = iommu_device_register(&iommu->iommu);
 		if (err)
-			goto err_unmap;
+			goto err_sysfs;
 	}
 
 	drhd->iommu = iommu;
@@ -1145,6 +1145,8 @@ static int alloc_iommu(struct dmar_drhd_
 
 	return 0;
 
+err_sysfs:
+	iommu_device_sysfs_remove(&iommu->iommu);
 err_unmap:
 	unmap_iommu(iommu);
 error_free_seq_id: