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Subject[PATCH] iommu: Fix reference count leak in iommu_group_alloc.
Date
From: Qiushi Wu <wu000273@umn.edu>

kobject_init_and_add() takes reference even when it fails.
Thus, when kobject_init_and_add() returns an error,
kobject_put() must be called to properly clean up the kobject.

Fixes: d72e31c93746 ("iommu: IOMMU Groups")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
drivers/iommu/iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 1faa08c8bbb4..03d6a26687bc 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -510,7 +510,7 @@ struct iommu_group *iommu_group_alloc(void)
NULL, "%d", group->id);
if (ret) {
ida_simple_remove(&iommu_group_ida, group->id);
- kfree(group);
+ kobject_put(&group->kobj);
return ERR_PTR(ret);
}

--
2.17.1
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