From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Woodhouse <dwmw2@infradead.org>, Liu Yi L <yi.l.liu@intel.com>
Cc: kernel-janitors@vger.kernel.org,
iommu@lists.linux-foundation.org, Will Deacon <will@kernel.org>
Subject: [PATCH] iommu/vt-d: check for allocation failure in aux_detach_device()
Date: Wed, 12 May 2021 13:05:32 +0300 [thread overview]
Message-ID: <YJuobKuSn81dOPLd@mwanda> (raw)
In current kernels small allocations never fail, but checking for
allocation failure is the correct thing to do.
Fixes: 18abda7a2d55 ("iommu/vt-d: Fix general protection fault in aux_detach_device()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/iommu/intel/iommu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index 708f430af1c4..9a7b79b5af18 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -4606,6 +4606,8 @@ static int auxiliary_link_device(struct dmar_domain *domain,
if (!sinfo) {
sinfo = kzalloc(sizeof(*sinfo), GFP_ATOMIC);
+ if (!sinfo)
+ return -ENOMEM;
sinfo->domain = domain;
sinfo->pdev = dev;
list_add(&sinfo->link_phys, &info->subdevices);
--
2.30.2
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next reply other threads:[~2021-05-12 10:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-12 10:05 Dan Carpenter [this message]
2021-05-12 11:28 ` [PATCH] iommu/vt-d: check for allocation failure in aux_detach_device() Lu Baolu
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