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b=DELixs+3JW+JqnfawdV6brsJEThbe9/wzBqUgy/CUKJ33mQbr/BNONavmP8E0HGmP LaK5jWZXYUAPerhqLMGTxgezcGLObtdiHj1XYVZ5yZ+jM2NMPeGFLfnM+QoPrdasYj YpIKZaPl6NCWE/BnE5KbZxY4FUD4zn8v2SG8wtxs= Date: Wed, 22 Oct 2025 19:45:41 -0700 From: Andrew Morton To: Pasha Tatashin Cc: Mike Rapoport , brauner@kernel.org, corbet@lwn.net, graf@amazon.com, jgg@ziepe.ca, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, masahiroy@kernel.org, ojeda@kernel.org, pratyush@kernel.org, rdunlap@infradead.org, tj@kernel.org, jasonmiu@google.com, dmatlack@google.com, skhawaja@google.com Subject: Re: [PATCH v3 0/3] KHO: kfence + KHO memory corruption fix Message-Id: <20251022194541.68c26d16b615ded15c5d3014@linux-foundation.org> In-Reply-To: References: <20251021000852.2924827-1-pasha.tatashin@soleen.com> <20251021135331.8e0185a173a5fa40add60802@linux-foundation.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 2A99BC0006 X-Stat-Signature: em8jf5d9ewrofbuf8i1keknxwyfeugpt X-Rspam-User: X-HE-Tag: 1761187544-350538 X-HE-Meta: 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 DobgqOo1 KUKCDafgj3R6GgBGs5dIa7LVBkfVsOnk0WnOoaGU2/6yHu4gMKa56OjR3UvVehZH/JA6LOH0X0w1YbMnkBc196+pr4mXXWQOVhDm43EwyUhSqB+Ti0Ihci8D+l/AjwHm6SPy6JnWd8kClmI45Bp+zQ3bmdsPqnvM7H3UW4Ttd+PDBMkztHTcWCHOE4tu9VegZ4gJm2j84ot/JnfTOhn7WUdZgsBYnFpwE7coNhEx8poNUdaGhvzN0pOTw0y6mLgT0VGLu170+iUQRm5nxkfvMtlsGFi9BCjWRU1Y57L53+trYVs/ohe+YFMEFXeOlVYlf9mnmQgOZSsVrL5kUT6ea7tOkchUQ1wfeZ7203h+Rfz9ZfuOVNSLUS0QeiYHBv7bxb+J4BfKdXtqOoryKs/F4jqNDXYgwit03UGSy 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: On Tue, 21 Oct 2025 20:15:04 -0400 Pasha Tatashin wrote: > On Tue, Oct 21, 2025 at 4:53 PM Andrew Morton wrote: > > > > On Tue, 21 Oct 2025 12:04:47 -0400 Pasha Tatashin wrote: > > > > > > With liveupdate: dropped from the subjects > > > > > > I noticed "liveupdate: " subject prefix left over only after sending > > > these patches. Andrew, would you like me to resend them, or could you > > > remove the prefix from these patches? > > > > No problem. > > > > What should we do about -stable kernels? > > > > It doesn't seem worthwhile to backport a 3-patch series for a pretty > > obscure bug. Perhaps we could merge a patch which disables this > > We are using KHO and have had obscure crashes due to this memory > corruption, with stacks all over the place. I would prefer this fix to > be properly backported to stable so we can also automatically consume > it once we switch to the upstream KHO. Oh. I added this important info to the [0/N] changelog, added Fixes: fc33e4b44b27 ("kexec: enable KHO support for memory preservation") Cc: to all three and moved this into mm.git's mm-hotfixes branch.