From: jeffxu@chromium.org
To: akpm@linux-foundation.org, keescook@chromium.org,
jannh@google.com, torvalds@linux-foundation.org, vbabka@suse.cz,
lorenzo.stoakes@oracle.com, Liam.Howlett@Oracle.com,
adhemerval.zanella@linaro.org, oleg@redhat.com, avagin@gmail.com,
benjamin@sipsolutions.net
Cc: linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
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groeck@chromium.org, mpe@ellerman.id.au,
aleksandr.mikhalitsyn@canonical.com, mike.rapoport@gmail.com,
Jeff Xu <jeffxu@chromium.org>
Subject: [PATCH v6 7/7] mseal, system mappings: update mseal.rst
Date: Mon, 24 Feb 2025 17:45:13 +0000 [thread overview]
Message-ID: <20250224174513.3600914-8-jeffxu@google.com> (raw)
In-Reply-To: <20250224174513.3600914-1-jeffxu@google.com>
From: Jeff Xu <jeffxu@chromium.org>
Update memory sealing documentation to include details about system
mappings.
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
---
Documentation/userspace-api/mseal.rst | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/userspace-api/mseal.rst b/Documentation/userspace-api/mseal.rst
index 41102f74c5e2..10147281bf2d 100644
--- a/Documentation/userspace-api/mseal.rst
+++ b/Documentation/userspace-api/mseal.rst
@@ -130,6 +130,13 @@ Use cases
- Chrome browser: protect some security sensitive data structures.
+- System mappings:
+ If supported by an architecture (via CONFIG_ARCH_HAS_MSEAL_SYSTEM_MAPPINGS),
+ the CONFIG_MSEAL_SYSTEM_MAPPINGS seals system mappings, e.g. vdso, vvar,
+ uprobes, sigpage, vectors, etc. CHECKPOINT_RESTORE, UML, gVisor, rr are
+ known to relocate or unmap system mapping, therefore this config can't be
+ enabled universally.
+
When not to use mseal
=====================
Applications can apply sealing to any virtual memory region from userspace,
--
2.48.1.601.g30ceb7b040-goog
next prev parent reply other threads:[~2025-02-24 17:45 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-24 17:45 [PATCH v6 0/7] mseal system mappings jeffxu
2025-02-24 17:45 ` [PATCH v6 1/7] mseal, system mappings: kernel config and header change jeffxu
2025-02-24 18:21 ` Dave Hansen
2025-02-24 18:44 ` Jeff Xu
2025-02-24 18:52 ` Dave Hansen
2025-02-24 18:55 ` Kees Cook
2025-02-24 18:59 ` Jeff Xu
2025-02-24 19:02 ` Dave Hansen
2025-02-24 19:10 ` Liam R. Howlett
2025-02-24 19:22 ` Jeff Xu
2025-02-24 19:32 ` Liam R. Howlett
2025-02-24 19:33 ` Jeff Xu
2025-02-24 19:26 ` Kees Cook
2025-02-24 19:34 ` Jeff Xu
2025-02-24 19:03 ` Liam R. Howlett
2025-02-24 19:07 ` Jeff Xu
2025-02-24 19:18 ` Liam R. Howlett
2025-02-24 19:39 ` Jeff Xu
2025-02-24 20:13 ` Liam R. Howlett
2025-02-24 19:10 ` Jeff Xu
2025-02-24 19:25 ` Kees Cook
2025-02-24 19:42 ` Jeff Xu
2025-02-24 20:12 ` Liam R. Howlett
2025-02-24 21:08 ` Jeff Xu
2025-02-24 17:45 ` [PATCH v6 2/7] selftests: x86: test_mremap_vdso: skip if vdso is msealed jeffxu
2025-02-24 19:02 ` Kees Cook
2025-02-24 21:04 ` Liam R. Howlett
2025-02-24 21:24 ` Jeff Xu
2025-02-24 17:45 ` [PATCH v6 3/7] mseal, system mappings: enable x86-64 jeffxu
2025-02-24 21:06 ` Liam R. Howlett
2025-02-24 17:45 ` [PATCH v6 4/7] mseal, system mappings: enable arm64 jeffxu
2025-02-24 17:45 ` [PATCH v6 5/7] mseal, system mappings: enable uml architecture jeffxu
2025-02-24 17:45 ` [PATCH v6 6/7] mseal, system mappings: uprobe mapping jeffxu
2025-02-24 17:45 ` jeffxu [this message]
2025-02-24 19:04 ` [PATCH v6 7/7] mseal, system mappings: update mseal.rst Kees Cook
2025-02-24 20:26 ` Liam R. Howlett
2025-02-24 21:06 ` Jeff Xu
2025-02-24 21:54 ` Jeff Xu
2025-02-25 6:07 ` Lorenzo Stoakes
2025-02-25 22:31 ` Jeff Xu
2025-02-25 22:36 ` Jeff Xu
2025-02-26 6:08 ` Lorenzo Stoakes
2025-02-26 5:27 ` Lorenzo Stoakes
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