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Mon, 12 Feb 2024 14:14:32 -0800 (PST) Date: Mon, 12 Feb 2024 14:14:31 -0800 From: Kees Cook To: Suren Baghdasaryan Cc: akpm@linux-foundation.org, kent.overstreet@linux.dev, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org Subject: Re: [PATCH v3 06/35] mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_ext creation Message-ID: <202402121414.EACBD205@keescook> References: <20240212213922.783301-1-surenb@google.com> <20240212213922.783301-7-surenb@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240212213922.783301-7-surenb@google.com> X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 44377C0017 X-Stat-Signature: n44kfereeroz4ksrtpr883foszwx4rms X-HE-Tag: 1707776073-785893 X-HE-Meta: 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 v8aK0qA5 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 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 Mon, Feb 12, 2024 at 01:38:52PM -0800, Suren Baghdasaryan wrote: > Introduce __GFP_NO_OBJ_EXT flag in order to prevent recursive allocations > when allocating slabobj_ext on a slab. > > Signed-off-by: Suren Baghdasaryan Reviewed-by: Kees Cook -- Kees Cook