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Howlett" , Kees Cook Subject: [PATCH v9 3/7] mseal sysmap: enable x86-64 Date: Wed, 5 Mar 2025 02:17:07 +0000 Message-ID: <20250305021711.3867874-4-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-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 28192100007 X-Stat-Signature: pjo317xgbkc9xm7uneo31zpxw73e9xc1 X-HE-Tag: 1741141045-477740 X-HE-Meta: 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 AOef69x3 ksJQ++tI7AvuTqL0L6cAFP0Gq8FWyLNoXD0uGNtjMFFy/Y0x/3w0J2Ek1eEUL7n1u9dM/CSHrDecQjhPRTA4magpzaL/bpzihTkS6jIXKfYbuqeq91jOTA+SYg/mBHWgtenis+jOVNXDW1CqYpF1LruJuqRbJMCtH4mDjNYnyGN+pxehVKA6/YJE/Ag5drACrn6FA15wAobwLaR0t9AMeut5BO5lMHg1m5e2Rv7L9VZPw2NAMozszPZrrq2aEinJjp5JEhDRzXNe2HE08f1yaHHV4nMLMLewWyMK1T71ZBGuuMPatuvNHfcOy0TI7fzrNOX2jfxh2yem/hG4EwRF3gzzuKvaqlw8QpkSuj1HsXVEjnpk0+i3uwZdThn13WZHE64QM+C4Mt+37K/+BMiXbsSNIKw== 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 x86-64, covering the vdso, vvar, vvar_vclock. 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/x86/Kconfig | 1 + arch/x86/entry/vdso/vma.c | 7 ++++--- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index be2c311f5118..c6f9ebcbe009 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -26,6 +26,7 @@ config X86_64 depends on 64BIT # Options that are inherently 64-bit kernel only: select ARCH_HAS_GIGANTIC_PAGE + select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 select ARCH_SUPPORTS_PER_VMA_LOCK select ARCH_SUPPORTS_HUGE_PFNMAP if TRANSPARENT_HUGEPAGE diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c index 39e6efc1a9ca..a4f312495de1 100644 --- a/arch/x86/entry/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c @@ -268,7 +268,8 @@ static int map_vdso(const struct vdso_image *image, unsigned long addr) text_start, image->size, VM_READ|VM_EXEC| - VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC, + VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC| + VM_SEALED_SYSMAP, &vdso_mapping); if (IS_ERR(vma)) { @@ -280,7 +281,7 @@ static int map_vdso(const struct vdso_image *image, unsigned long addr) addr, (__VVAR_PAGES - VDSO_NR_VCLOCK_PAGES) * PAGE_SIZE, VM_READ|VM_MAYREAD|VM_IO|VM_DONTDUMP| - VM_PFNMAP, + VM_PFNMAP|VM_SEALED_SYSMAP, &vvar_mapping); if (IS_ERR(vma)) { @@ -293,7 +294,7 @@ static int map_vdso(const struct vdso_image *image, unsigned long addr) addr + (__VVAR_PAGES - VDSO_NR_VCLOCK_PAGES) * PAGE_SIZE, VDSO_NR_VCLOCK_PAGES * PAGE_SIZE, VM_READ|VM_MAYREAD|VM_IO|VM_DONTDUMP| - VM_PFNMAP, + VM_PFNMAP|VM_SEALED_SYSMAP, &vvar_vclock_mapping); if (IS_ERR(vma)) { -- 2.48.1.711.g2feabab25a-goog