From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754160AbdFPOL7 (ORCPT ); Fri, 16 Jun 2017 10:11:59 -0400 Received: from 8bytes.org ([81.169.241.247]:33890 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754051AbdFPOKr (ORCPT ); Fri, 16 Jun 2017 10:10:47 -0400 From: Joerg Roedel To: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org, Joerg Roedel Subject: [PATCH 5/7] iommu/amd: Set global pointers to NULL after freeing them Date: Fri, 16 Jun 2017 16:09:58 +0200 Message-Id: <1497622200-18188-6-git-send-email-joro@8bytes.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1497622200-18188-1-git-send-email-joro@8bytes.org> References: <1497622200-18188-1-git-send-email-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel Avoid any tries to double-free these pointers. Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu_init.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index a31f375..d04898c 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -2112,18 +2112,22 @@ static void __init free_iommu_resources(void) kmemleak_free(irq_lookup_table); free_pages((unsigned long)irq_lookup_table, get_order(rlookup_table_size)); + irq_lookup_table = NULL; kmem_cache_destroy(amd_iommu_irq_cache); amd_iommu_irq_cache = NULL; free_pages((unsigned long)amd_iommu_rlookup_table, get_order(rlookup_table_size)); + amd_iommu_rlookup_table = NULL; free_pages((unsigned long)amd_iommu_alias_table, get_order(alias_table_size)); + amd_iommu_alias_table = NULL; free_pages((unsigned long)amd_iommu_dev_table, get_order(dev_table_size)); + amd_iommu_dev_table = NULL; free_iommu_all(); @@ -2193,6 +2197,7 @@ static void __init free_dma_resources(void) { free_pages((unsigned long)amd_iommu_pd_alloc_bitmap, get_order(MAX_DOMAIN_ID/8)); + amd_iommu_pd_alloc_bitmap = NULL; free_unity_maps(); } -- 2.7.4