linux-kernel - [PATCH AUTOSEL 4.9 01/21] iommu/arm-smmu: Free context bitmap in the err path of arm_smmu_init_domain

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Message-Id: <20191026132217.4380-1-sashal@kernel.org>
Date:   Sat, 26 Oct 2019 09:21:57 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Liu Xiang <liuxiang_1999@....com>, Will Deacon <will@...nel.org>,
        Sasha Levin <sashal@...nel.org>,
        iommu@...ts.linux-foundation.org
Subject: [PATCH AUTOSEL 4.9 01/21] iommu/arm-smmu: Free context bitmap in the err path of arm_smmu_init_domain_context

From: Liu Xiang <liuxiang_1999@....com>

[ Upstream commit 6db7bfb431220d78e34d2d0afdb7c12683323588 ]

When alloc_io_pgtable_ops is failed, context bitmap which is just allocated
by __arm_smmu_alloc_bitmap should be freed to release the resource.

Signed-off-by: Liu Xiang <liuxiang_1999@....com>
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/iommu/arm-smmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index f7ecb30a0bac8..5b3124eb184e7 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -968,6 +968,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
 	return 0;
 
 out_clear_smmu:
+	__arm_smmu_free_bitmap(smmu->context_map, cfg->cbndx);
 	smmu_domain->smmu = NULL;
 out_unlock:
 	mutex_unlock(&smmu_domain->init_mutex);
-- 
2.20.1