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,
linux-mm@kvack.org, jorgelo@chromium.org, sroettger@google.com,
hch@lst.de, ojeda@kernel.org, thomas.weissschuh@linutronix.de,
adobriyan@gmail.com, johannes@sipsolutions.net,
pedro.falcato@gmail.com, hca@linux.ibm.com, willy@infradead.org,
anna-maria@linutronix.de, mark.rutland@arm.com,
linus.walleij@linaro.org, Jason@zx2c4.com, deller@gmx.de,
rdunlap@infradead.org, davem@davemloft.net, peterx@redhat.com,
f.fainelli@gmail.com, gerg@kernel.org,
dave.hansen@linux.intel.com, mingo@kernel.org, ardb@kernel.org,
mhocko@suse.com, 42.hyeyoo@gmail.com, peterz@infradead.org,
ardb@google.com, enh@google.com, rientjes@google.com,
groeck@chromium.org, mpe@ellerman.id.au,
aleksandr.mikhalitsyn@canonical.com, mike.rapoport@gmail.com,
Jeff Xu <jeffxu@chromium.org>, Kees Cook <kees@kernel.org>
Subject: [PATCH v7 7/7] mseal, system mappings: update mseal.rst
Date: Mon, 24 Feb 2025 22:52:46 +0000 [thread overview]
Message-ID: <20250224225246.3712295-8-jeffxu@google.com> (raw)
In-Reply-To: <20250224225246.3712295-1-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>
Reviewed-by: Kees Cook <kees@kernel.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,
--
2.48.1.658.g4767266eb4-goog
next prev parent reply other threads:[~2025-02-24 22:52 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-24 22:52 [PATCH v7 0/7] mseal system mappings jeffxu
2025-02-24 22:52 ` [PATCH v7 1/7] mseal, system mappings: kernel config and header change jeffxu
2025-02-25 6:05 ` Lorenzo Stoakes
2025-02-26 1:33 ` Jeff Xu
2025-02-26 6:04 ` Lorenzo Stoakes
2025-02-28 0:04 ` Jeff Xu
2025-02-28 10:32 ` Lorenzo Stoakes
2025-02-25 15:22 ` Liam R. Howlett
2025-02-25 15:37 ` Lorenzo Stoakes
2025-02-26 0:04 ` Jeff Xu
2025-02-24 22:52 ` [PATCH v7 2/7] selftests: x86: test_mremap_vdso: skip if vdso is msealed jeffxu
2025-02-25 6:15 ` Lorenzo Stoakes
2025-02-25 22:37 ` Jeff Xu
2025-02-26 5:58 ` Lorenzo Stoakes
2025-02-24 22:52 ` [PATCH v7 3/7] mseal, system mappings: enable x86-64 jeffxu
2025-02-25 1:03 ` Kees Cook
2025-02-26 0:21 ` Jeff Xu
2025-02-25 8:08 ` Thomas Weißschuh
2025-02-26 0:48 ` Jeff Xu
2025-02-26 7:35 ` Thomas Weißschuh
2025-02-27 21:44 ` Jeff Xu
2025-02-24 22:52 ` [PATCH v7 4/7] mseal, system mappings: enable arm64 jeffxu
2025-02-25 6:20 ` Lorenzo Stoakes
2025-02-25 22:26 ` Jeff Xu
2025-02-26 5:25 ` Lorenzo Stoakes
2025-02-26 17:11 ` Liam R. Howlett
2025-02-26 17:17 ` Jeff Xu
2025-02-26 17:43 ` Lorenzo Stoakes
2025-02-26 18:14 ` Lorenzo Stoakes
2025-02-28 0:48 ` Jeff Xu
2025-02-28 10:31 ` Lorenzo Stoakes
2025-02-24 22:52 ` [PATCH v7 5/7] mseal, system mappings: enable uml architecture jeffxu
2025-02-25 6:22 ` Lorenzo Stoakes
2025-02-25 8:45 ` Berg, Benjamin
2025-02-25 10:37 ` Lorenzo Stoakes
2025-02-25 12:24 ` Benjamin Berg
2025-02-25 13:41 ` Lorenzo Stoakes
2025-02-25 13:59 ` Johannes Berg
2025-02-25 15:06 ` Kees Cook
2025-02-25 15:31 ` Lorenzo Stoakes
2025-02-25 18:38 ` Kees Cook
2025-02-26 0:00 ` Jeff Xu
2025-02-24 22:52 ` [PATCH v7 6/7] mseal, system mappings: uprobe mapping jeffxu
2025-02-25 6:24 ` Lorenzo Stoakes
2025-02-26 0:06 ` Jeff Xu
2025-02-26 5:57 ` Lorenzo Stoakes
2025-02-26 16:26 ` Oleg Nesterov
2025-02-26 16:33 ` Oleg Nesterov
2025-02-26 16:45 ` Lorenzo Stoakes
2025-02-26 18:01 ` Oleg Nesterov
2025-02-26 18:06 ` Lorenzo Stoakes
2025-02-26 18:19 ` Liam R. Howlett
2025-02-26 18:20 ` Oleg Nesterov
2025-02-26 18:25 ` Lorenzo Stoakes
2025-02-27 23:38 ` Jeff Xu
2025-02-28 10:39 ` Lorenzo Stoakes
2025-02-27 21:48 ` Jeff Xu
2025-02-24 22:52 ` jeffxu [this message]
2025-02-24 23:03 ` [PATCH v7 0/7] mseal system mappings Pedro Falcato
2025-02-24 23:07 ` Jeff Xu
2025-02-25 6:09 ` Lorenzo Stoakes
2025-02-25 10:32 ` Lorenzo Stoakes
2025-02-26 0:17 ` Jeff Xu
2025-02-26 6:00 ` Lorenzo Stoakes
2025-02-27 23:43 ` Jeff Xu
2025-02-28 10:32 ` Lorenzo Stoakes
2025-02-25 15:18 ` Lorenzo Stoakes
2025-02-26 0:12 ` Jeff Xu
2025-02-26 5:42 ` your mail Lorenzo Stoakes
2025-02-28 0:55 ` Jeff Xu
2025-02-28 9:35 ` Lorenzo Stoakes
2025-02-28 17:24 ` Jeff Xu
2025-02-28 17:30 ` Lorenzo Stoakes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250224225246.3712295-8-jeffxu@google.com \
--to=jeffxu@chromium.org \
--cc=42.hyeyoo@gmail.com \
--cc=Jason@zx2c4.com \
--cc=Liam.Howlett@Oracle.com \
--cc=adhemerval.zanella@linaro.org \
--cc=adobriyan@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=aleksandr.mikhalitsyn@canonical.com \
--cc=anna-maria@linutronix.de \
--cc=ardb@google.com \
--cc=ardb@kernel.org \
--cc=avagin@gmail.com \
--cc=benjamin@sipsolutions.net \
--cc=dave.hansen@linux.intel.com \
--cc=davem@davemloft.net \
--cc=deller@gmx.de \
--cc=enh@google.com \
--cc=f.fainelli@gmail.com \
--cc=gerg@kernel.org \
--cc=groeck@chromium.org \
--cc=hca@linux.ibm.com \
--cc=hch@lst.de \
--cc=jannh@google.com \
--cc=johannes@sipsolutions.net \
--cc=jorgelo@chromium.org \
--cc=kees@kernel.org \
--cc=keescook@chromium.org \
--cc=linus.walleij@linaro.org \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lorenzo.stoakes@oracle.com \
--cc=mark.rutland@arm.com \
--cc=mhocko@suse.com \
--cc=mike.rapoport@gmail.com \
--cc=mingo@kernel.org \
--cc=mpe@ellerman.id.au \
--cc=ojeda@kernel.org \
--cc=oleg@redhat.com \
--cc=pedro.falcato@gmail.com \
--cc=peterx@redhat.com \
--cc=peterz@infradead.org \
--cc=rdunlap@infradead.org \
--cc=rientjes@google.com \
--cc=sroettger@google.com \
--cc=thomas.weissschuh@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=vbabka@suse.cz \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.