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iommu: Fix reference count leak in iommu_group_alloc. 

[ Upstream commit 7cc3161373 ]

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: d72e31c937 ("iommu: IOMMU Groups")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Link: https://lore.kernel.org/r/20200527210020.6522-1-wu000273@umn.edu
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Qiushi Wu 2020-05-27 16:00:19 -05:00 committed by Greg Kroah-Hartman
parent b298c314b9
commit ca788fd797
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/iommu.c
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@ -492,7 +492,7 @@ 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);
}