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From: Shakeel Butt To: Suren Baghdasaryan Cc: vbabka@suse.cz, akpm@linux-foundation.org, cl@gentwo.org, rientjes@google.com, roman.gushchin@linux.dev, harry.yoo@oracle.com, alexei.starovoitov@gmail.com, usamaarif642@gmail.com, 00107082@163.com, souravpanda@google.com, kent.overstreet@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH 2/2] slab: mark slab->obj_exts allocation failures unconditionally Message-ID: References: <20250915200918.3855580-1-surenb@google.com> <20250915200918.3855580-3-surenb@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250915200918.3855580-3-surenb@google.com> X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 72F451A000D X-Stat-Signature: uffpgnq7njd4g6wtrqmjenxym3ptt3rz X-HE-Tag: 1757967329-22691 X-HE-Meta: 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 w00ncvav wOODrhOs7mEKp4BSXAatkhHTAH5/v2pUbkIGWtXyTTWcffqsKwz8QSn7cp+AR12DFSFHDDZbR1qL57Ow1rE5HRvGnzJvYdK9hZc0J9ON2XTBZhCXq1fZMCddcOFDRa8LzuBKqPqzqJCTPCcHZs61j7/qHYT35E28t0JkYyKy+DSYl/uy9/odXGsVUiiNwQtjVWXd3gGDIKJ1XpodNU9lhtK1z1pE1eSq7ea+JVcgl3XGmOWFwdkI0FeTLfiDHxUFWhspWUZqpAetwpDuJtQUEFDaahX1UK55wYLUkHCTzm1mYALxZOm3r0Bgd5IMo+CQvbsiSayLPvXZSc9rQoHiQaCrJN7xwT1pe4waqV0xKV1e276ZjDMqhuPx4gw== 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, Sep 15, 2025 at 01:09:18PM -0700, Suren Baghdasaryan wrote: > alloc_slab_obj_exts() should mark failed obj_exts vector allocations > independent on whether the vector is being allocated for a new or an > existing slab. Current implementation skips doing this for existing > slabs. Fix this by marking failed allocations unconditionally. > > Fixes: 09c46563ff6d ("codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations") > Reported-by: Shakeel Butt > Closes: https://lore.kernel.org/all/avhakjldsgczmq356gkwmvfilyvf7o6temvcmtt5lqd4fhp5rk@47gp2ropyixg/ > Signed-off-by: Suren Baghdasaryan > Cc: stable@vger.kernel.org # v6.10+ Acked-by: Shakeel Butt