From: Dan Carpenter 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 Acked-by: Lu Baolu 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 --- 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);