Commit 1a590a1c authored by Dan Carpenter's avatar Dan Carpenter Committed by Joerg Roedel
Browse files

iommu/vt-d: Check for allocation failure in aux_detach_device() 



In current kernels small allocations never fail, but checking for
allocation failure is the correct thing to do.

Fixes: 18abda7a ("iommu/vt-d: Fix general protection fault in aux_detach_device()")
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Acked-by: default avatarLu 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: default avatarJoerg Roedel <jroedel@suse.de>
parent 382d91fc

drivers/iommu/intel/iommu.c

+2 −0
Original line number Diff line number Diff line
@@ -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);