From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>, Joerg Roedel <jroedel@suse.de>,
Tang Bin <tangbin@cmss.chinamobile.com>,
linux-arm-msm@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@linaro.org>,
iommu@lists.linux-foundation.org
Subject: [PATCH AUTOSEL 4.19 20/20] iommu/qcom: Fix local_base status check
Date: Thu, 7 May 2020 10:29:16 -0400 [thread overview]
Message-ID: <20200507142917.26612-20-sashal@kernel.org> (raw)
In-Reply-To: <20200507142917.26612-1-sashal@kernel.org>
From: Tang Bin <tangbin@cmss.chinamobile.com>
[ Upstream commit b52649aee6243ea661905bdc5fbe28cc5f6dec76 ]
The function qcom_iommu_device_probe() does not perform sufficient
error checking after executing devm_ioremap_resource(), which can
result in crashes if a critical error path is encountered.
Fixes: 0ae349a0f33f ("iommu/qcom: Add qcom_iommu")
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200418134703.1760-1-tangbin@cmss.chinamobile.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/qcom_iommu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index 9a6ed5eeaad16..b0a4a3d2f60ea 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -797,8 +797,11 @@ static int qcom_iommu_device_probe(struct platform_device *pdev)
qcom_iommu->dev = dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (res)
+ if (res) {
qcom_iommu->local_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(qcom_iommu->local_base))
+ return PTR_ERR(qcom_iommu->local_base);
+ }
qcom_iommu->iface_clk = devm_clk_get(dev, "iface");
if (IS_ERR(qcom_iommu->iface_clk)) {
--
2.20.1
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prev parent reply other threads:[~2020-05-07 14:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200507142917.26612-1-sashal@kernel.org>
2020-05-07 14:29 ` [PATCH AUTOSEL 4.19 19/20] iommu/amd: Fix legacy interrupt remapping for x2APIC-enabled system Sasha Levin
2020-05-07 14:29 ` Sasha Levin [this message]
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