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Howlett" , Kees Cook Subject: [PATCH v9 4/7] mseal sysmap: enable arm64 Date: Wed, 5 Mar 2025 02:17:08 +0000 Message-ID: <20250305021711.3867874-5-jeffxu@google.com> X-Mailer: git-send-email 2.48.1.711.g2feabab25a-goog In-Reply-To: <20250305021711.3867874-1-jeffxu@google.com> References: <20250305021711.3867874-1-jeffxu@google.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: B6CC6A0007 X-Stat-Signature: 5f8g3xw5fdagj4octt8a9ij6aoyk6h3h X-Rspam-User: X-HE-Tag: 1741141047-817523 X-HE-Meta: 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 rUODOyR4 RbRhVToqPKBIbwhbysSks3/selNvlpdW8L3nlbsGLdraPrNNs59hKGOa2PQ8luLc8vxq0fHxIWgH51oSXpYQdPm97a60xahu94KvW2VMHdaX087WCCVU3RyYyyC7nOVeigZXQj9ElD4PKwoLGVBKtGvi3UJ5N68sJu2/NCD0vuSLpkeAeb+9Yqrkt87mCyNNkPQY+UmQG6HIK4CEMUux2KFqX0ld06v6/f7AB7u6Z+4h8CYebbJrb322rAFTGzSGG/eBwB6Q+yp/cnG3KAST7sJe/vze7HNmpFkZ3TOpF44ekRN/UHOejaxj0riuB7KUzp+i+dia3NM70cDRHPhspyxDHT0sAeypt92iAx/MQHKKDXJ+8gaLONLJ/95Io/dwJtTQ3AGasK9UF20M9jQPbdkxU5A== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Jeff Xu Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS on arm64, covering the vdso, vvar, and compat-mode vectors and sigpage mappings. Production release testing passes on Android and Chrome OS. Signed-off-by: Jeff Xu Reviewed-by: Lorenzo Stoakes Reviewed-by: Liam R. Howlett Reviewed-by: Kees Cook --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/vdso.c | 12 ++++++++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 940343beb3d4..282d6cb13cfb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -38,6 +38,7 @@ config ARM64 select ARCH_HAS_KEEPINITRD select ARCH_HAS_MEMBARRIER_SYNC_CORE select ARCH_HAS_MEM_ENCRYPT + select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_NONLEAF_PMD_YOUNG if ARM64_HAFT diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index e8ed8e5b713b..69d2b5ceb092 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -198,7 +198,8 @@ static int __setup_additional_pages(enum vdso_abi abi, } ret = _install_special_mapping(mm, vdso_base, VVAR_NR_PAGES * PAGE_SIZE, - VM_READ|VM_MAYREAD|VM_PFNMAP, + VM_READ|VM_MAYREAD|VM_PFNMAP| + VM_SEALED_SYSMAP, &vvar_map); if (IS_ERR(ret)) goto up_fail; @@ -210,7 +211,8 @@ static int __setup_additional_pages(enum vdso_abi abi, mm->context.vdso = (void *)vdso_base; ret = _install_special_mapping(mm, vdso_base, vdso_text_len, VM_READ|VM_EXEC|gp_flags| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| + VM_SEALED_SYSMAP, vdso_info[abi].cm); if (IS_ERR(ret)) goto up_fail; @@ -336,7 +338,8 @@ static int aarch32_kuser_helpers_setup(struct mm_struct *mm) */ ret = _install_special_mapping(mm, AARCH32_VECTORS_BASE, PAGE_SIZE, VM_READ | VM_EXEC | - VM_MAYREAD | VM_MAYEXEC, + VM_MAYREAD | VM_MAYEXEC | + VM_SEALED_SYSMAP, &aarch32_vdso_maps[AA32_MAP_VECTORS]); return PTR_ERR_OR_ZERO(ret); @@ -359,7 +362,8 @@ static int aarch32_sigreturn_setup(struct mm_struct *mm) */ ret = _install_special_mapping(mm, addr, PAGE_SIZE, VM_READ | VM_EXEC | VM_MAYREAD | - VM_MAYWRITE | VM_MAYEXEC, + VM_MAYWRITE | VM_MAYEXEC | + VM_SEALED_SYSMAP, &aarch32_vdso_maps[AA32_MAP_SIGPAGE]); if (IS_ERR(ret)) goto out; -- 2.48.1.711.g2feabab25a-goog