From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B80FEB64DD for ; Sun, 16 Jul 2023 19:54:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230203AbjGPTyt (ORCPT ); Sun, 16 Jul 2023 15:54:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230243AbjGPTys (ORCPT ); Sun, 16 Jul 2023 15:54:48 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A34A51BE for ; Sun, 16 Jul 2023 12:54:47 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 32D3C60E88 for ; Sun, 16 Jul 2023 19:54:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 487D3C433C8; Sun, 16 Jul 2023 19:54:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689537286; bh=VKojzvPKOdH4bD4SmkMve47cM1W0DZqlmLROJVaUQug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yRYF4txWtw2R9tbtYSPD0xLgI20KQX1rqhd0BFDWfs0Rg/uuw8fMeUmCN7IVbdcC+ O/T/mWJ7X2y7YdcnulqkwXT8cctd/CmYZE295XxOucauLwX36HVznPwSdL42ALTEw3 9lskTYP6PXzlXWoHeZ9bYAqOJKs2aKrVqDEc1G5w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tom Lendacky , "Borislav Petkov (AMD)" , Sasha Levin Subject: [PATCH 6.4 024/800] x86/sev: Fix calculation of end address based on number of pages Date: Sun, 16 Jul 2023 21:37:57 +0200 Message-ID: <20230716194949.663283418@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194949.099592437@linuxfoundation.org> References: <20230716194949.099592437@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Tom Lendacky [ Upstream commit 5dee19b6b2b194216919b99a1f5af2949a754016 ] When calculating an end address based on an unsigned int number of pages, any value greater than or equal to 0x100000 that is shift PAGE_SHIFT bits results in a 0 value, resulting in an invalid end address. Change the number of pages variable in various routines from an unsigned int to an unsigned long to calculate the end address correctly. Fixes: 5e5ccff60a29 ("x86/sev: Add helper for validating pages in early enc attribute changes") Fixes: dc3f3d2474b8 ("x86/mm: Validate memory when changing the C-bit") Signed-off-by: Tom Lendacky Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/6a6e4eea0e1414402bac747744984fa4e9c01bb6.1686063086.git.thomas.lendacky@amd.com Signed-off-by: Sasha Levin --- arch/x86/include/asm/sev.h | 16 ++++++++-------- arch/x86/kernel/sev.c | 14 +++++++------- 2 files changed, 15 insertions(+), 15 deletions(-) diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h index 13dc2a9d23c1e..7ca5c9ec8b52e 100644 --- a/arch/x86/include/asm/sev.h +++ b/arch/x86/include/asm/sev.h @@ -192,12 +192,12 @@ struct snp_guest_request_ioctl; void setup_ghcb(void); void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, - unsigned int npages); + unsigned long npages); void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, - unsigned int npages); + unsigned long npages); void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc_op op); -void snp_set_memory_shared(unsigned long vaddr, unsigned int npages); -void snp_set_memory_private(unsigned long vaddr, unsigned int npages); +void snp_set_memory_shared(unsigned long vaddr, unsigned long npages); +void snp_set_memory_private(unsigned long vaddr, unsigned long npages); void snp_set_wakeup_secondary_cpu(void); bool snp_init(struct boot_params *bp); void __init __noreturn snp_abort(void); @@ -212,12 +212,12 @@ static inline int pvalidate(unsigned long vaddr, bool rmp_psize, bool validate) static inline int rmpadjust(unsigned long vaddr, bool rmp_psize, unsigned long attrs) { return 0; } static inline void setup_ghcb(void) { } static inline void __init -early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, unsigned int npages) { } +early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, unsigned long npages) { } static inline void __init -early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsigned int npages) { } +early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsigned long npages) { } static inline void __init snp_prep_memory(unsigned long paddr, unsigned int sz, enum psc_op op) { } -static inline void snp_set_memory_shared(unsigned long vaddr, unsigned int npages) { } -static inline void snp_set_memory_private(unsigned long vaddr, unsigned int npages) { } +static inline void snp_set_memory_shared(unsigned long vaddr, unsigned long npages) { } +static inline void snp_set_memory_private(unsigned long vaddr, unsigned long npages) { } static inline void snp_set_wakeup_secondary_cpu(void) { } static inline bool snp_init(struct boot_params *bp) { return false; } static inline void snp_abort(void) { } diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c index b031244d6d2df..108bbae59c35a 100644 --- a/arch/x86/kernel/sev.c +++ b/arch/x86/kernel/sev.c @@ -645,7 +645,7 @@ static u64 __init get_jump_table_addr(void) return ret; } -static void pvalidate_pages(unsigned long vaddr, unsigned int npages, bool validate) +static void pvalidate_pages(unsigned long vaddr, unsigned long npages, bool validate) { unsigned long vaddr_end; int rc; @@ -662,7 +662,7 @@ static void pvalidate_pages(unsigned long vaddr, unsigned int npages, bool valid } } -static void __init early_set_pages_state(unsigned long paddr, unsigned int npages, enum psc_op op) +static void __init early_set_pages_state(unsigned long paddr, unsigned long npages, enum psc_op op) { unsigned long paddr_end; u64 val; @@ -701,7 +701,7 @@ static void __init early_set_pages_state(unsigned long paddr, unsigned int npage } void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, - unsigned int npages) + unsigned long npages) { /* * This can be invoked in early boot while running identity mapped, so @@ -723,7 +723,7 @@ void __init early_snp_set_memory_private(unsigned long vaddr, unsigned long padd } void __init early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, - unsigned int npages) + unsigned long npages) { /* * This can be invoked in early boot while running identity mapped, so @@ -879,7 +879,7 @@ static void __set_pages_state(struct snp_psc_desc *data, unsigned long vaddr, sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_PSC); } -static void set_pages_state(unsigned long vaddr, unsigned int npages, int op) +static void set_pages_state(unsigned long vaddr, unsigned long npages, int op) { unsigned long vaddr_end, next_vaddr; struct snp_psc_desc *desc; @@ -904,7 +904,7 @@ static void set_pages_state(unsigned long vaddr, unsigned int npages, int op) kfree(desc); } -void snp_set_memory_shared(unsigned long vaddr, unsigned int npages) +void snp_set_memory_shared(unsigned long vaddr, unsigned long npages) { if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) return; @@ -914,7 +914,7 @@ void snp_set_memory_shared(unsigned long vaddr, unsigned int npages) set_pages_state(vaddr, npages, SNP_PAGE_STATE_SHARED); } -void snp_set_memory_private(unsigned long vaddr, unsigned int npages) +void snp_set_memory_private(unsigned long vaddr, unsigned long npages) { if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP)) return; -- 2.39.2