linux-kernel - [PATCH -next] iommu: Remove duplicate ida_free in iommu_group

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 15 Aug 2022 03:14:23 +0000
From:   Yuan Can <yuancan@...wei.com>
To:     <joro@...tes.org>, <will@...nel.org>, <robin.murphy@....com>,
        <iommu@...ts.linux.dev>
CC:     <linux-kernel@...r.kernel.org>, <yuancan@...wei.com>
Subject: [PATCH -next] iommu: Remove duplicate ida_free in iommu_group_alloc

In the iommu_group_alloc, when the kobject_init_and_add
failed, the group->kobj is associate with iommu_group_ktype,
thus its release function iommu_group_release will be called
by the following kobject_put. The iommu_group_release calls
ida_free with the group->id, so we do not need to do it before
kobject_put.

Signed-off-by: Yuan Can <yuancan@...wei.com>
---
 drivers/iommu/iommu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 780fb7071577..74bc9111c7be 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -654,7 +654,6 @@ struct iommu_group *iommu_group_alloc(void)
 	ret = kobject_init_and_add(&group->kobj, &iommu_group_ktype,
 				   NULL, "%d", group->id);
 	if (ret) {
-		ida_free(&iommu_group_ida, group->id);
 		kobject_put(&group->kobj);
 		return ERR_PTR(ret);
 	}
-- 
2.17.1