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Howlett" , Jeff Xu , akpm@linux-foundation.org, keescook@chromium.org, jannh@google.com, torvalds@linux-foundation.org, adhemerval.zanella@linaro.org, oleg@redhat.com, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, jorgelo@chromium.org, sroettger@google.com, ojeda@kernel.org, adobriyan@gmail.com, anna-maria@linutronix.de, mark.rutland@arm.com, linus.walleij@linaro.org, Jason@zx2c4.com, deller@gmx.de, rdunlap@infradead.org, davem@davemloft.net, hch@lst.de, peterx@redhat.com, hca@linux.ibm.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, lorenzo.stoakes@oracle.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 4F46D40006 X-Stat-Signature: 3pfmgnhxs19sg4ya91bekbskhhpdysp3 X-HE-Tag: 1731349540-944624 X-HE-Meta: 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 pHGXTyxe VNLL/EVQD+7oZPhgftfkdhgZhRcwYWJq0voa8ESAZ2fVSuTFMu85AsJdAdxuBTsNQquKjDrfAzSCC3ZXBa0jjL4eNv8dLuGpeGQUIPKQWcU8d7VvDbYop2kbTYelE+6rdwEWDJSzw5H0RGuioApPXiCWa8WGzI7i2hu0dOi8Le4hoFTx4F0Y1UjlksnV+muy7hMEMarybIAy5bvYurjRBi4qmAh5KUXvThkkPEus/ZYGUm364fXduuzqKU3jfCG+3KpQBzMloqqV/in17id5WIW+yumearD+3IL54jcq69fJxT/fy3Qs1ZaUEUaTNZImoUbKL X-Bogosity: Ham, tests=bogofilter, spamicity=0.005222, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Liam On Wed, Oct 16, 2024 at 7:03=E2=80=AFPM Liam R. Howlett wrote: > > * Jeff Xu [241016 20:59]: > > On Wed, Oct 16, 2024 at 4:18=E2=80=AFPM Liam R. Howlett wrote: > > > > > > * jeffxu@chromium.org [241014 17:50]: > > > > From: Jeff Xu > > > > > > > > Seal vdso, vvar, sigpage, uprobes and vsyscall. > > > > > > > > Those mappings are readonly or executable only, sealing can protect > > > > them from ever changing during the life time of the process. For > > > > complete descriptions of memory sealing, please see mseal.rst [1]. > > > > I will mention unmap in the above sentence. > > > > System mappings such as vdso, vvar, and sigpage (for arm) are > > > > generated by the kernel during program initialization. These mappin= gs > > > > are designated as non-writable, and sealing them will prevent them > > > > from ever becoming writeable. > > > ^ or ever removed. > > > This section is about the mappings (vdso, etc) created during program initialization vs later time as uprobe, I will revise to make it clearer to the reader. Thanks -Jeff