From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 19 May 2021 09:50:26 +0800
Subject: iommu/vt-d: Check for allocation failure in aux_detach_device()
Git-commit: 1a590a1c8bf46bf80ea12b657ca44c345531ac80
Patch-mainline: v5.13-rc4
References: bsc#1189215
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>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/YJuobKuSn81dOPLd@mwanda
Link: https://lore.kernel.org/r/20210519015027.108468-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/intel/iommu.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5088,6 +5088,8 @@ static int auxiliary_link_device(struct
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);