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[202.108.3.167]) by mx.google.com with SMTP id z21si3182517pgf.268.2019.06.19.06.37.28 for ; Wed, 19 Jun 2019 06:37:29 -0700 (PDT) Received-SPF: pass (google.com: domain of hdanton@sina.com designates 202.108.3.167 as permitted sender) client-ip=202.108.3.167; Authentication-Results: mx.google.com; spf=pass (google.com: domain of hdanton@sina.com designates 202.108.3.167 as permitted sender) smtp.mailfrom=hdanton@sina.com Received: from unknown (HELO localhost.localdomain)([221.219.4.32]) by sina.com with ESMTP id 5D0A3A9500004E41; Wed, 19 Jun 2019 21:37:27 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com X-SMAIL-MID: 292968395451 From: Hillf Danton To: Qian Cai Cc: Vladimir Davydov , Andrew Morton , Linux MM , Linux Kernel Mailing List , Johannes Weiner , Roman Gushchin Subject: Re: "mm: reparent slab memory on cgroup removal" series triggers SLUB_DEBUG errors Date: Wed, 19 Jun 2019 21:37:15 +0800 Message-Id: <20190619133715.12112-1-hdanton@sina.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Archived-At: List-Archive: List-Post: Content-Transfer-Encoding: 8bit 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: Hello On Tue, 18 Jun 2019 14:43:05 -0700 (PDT) Qian Cai wrote: > > [1] https://lore.kernel.org/lkml/20190611231813.3148843-1-guro@fb.com/ > > [ 151.773224][ T1650] BUG kmem_cache (Tainted: G B W ): Poison overwritten > [ 151.780969][ T1650] ----------------------------------------------------------------------------- > [ 151.780969][ T1650] > [ 151.792016][ T1650] INFO: 0x000000001fd6fdef-0x0000000007f6bb36. First byte 0x0 instead of 0x6b > [ 151.800726][ T1650] INFO: Allocated in create_cache+0x6c/0x1bc age$301 cpu— pid44 > [ 151.808821][ T1650] kmem_cache_alloc+0x514/0x568 > [ 151.813527][ T1650] create_cache+0x6c/0x1bc > [ 151.817800][ T1650] memcg_create_kmem_cache+0xfc/0x11c > [ 151.823028][ T1650] memcg_kmem_cache_create_func+0x40/0x170 > [ 151.828691][ T1650] process_one_work+0x4e0/0xa54 > [ 151.833398][ T1650] worker_thread+0x498/0x650 > [ 151.837843][ T1650] kthread+0x1b8/0x1d4 > [ 151.841770][ T1650] ret_from_fork+0x10/0x18 > [ 151.846046][ T1650] INFO: Freed in slab_kmem_cache_release+0x3c/0x48 age#341 cpu( pid80 > [ 151.854659][ T1650] slab_kmem_cache_release+0x3c/0x48 > [ 151.859799][ T1650] kmem_cache_release+0x1c/0x28 > [ 151.864507][ T1650] kobject_cleanup+0x134/0x288 > [ 151.869127][ T1650] kobject_put+0x5c/0x68 > [ 151.873226][ T1650] sysfs_slab_release+0x2c/0x38 > [ 151.877931][ T1650] shutdown_cache+0x198/0x23c > [ 151.882464][ T1650] kmemcg_cache_shutdown_fn+0x1c/0x34 > [ 151.887691][ T1650] kmemcg_workfn+0x44/0x68 > [ 151.891963][ T1650] process_one_work+0x4e0/0xa54 > [ 151.896668][ T1650] worker_thread+0x498/0x650 > [ 151.901113][ T1650] kthread+0x1b8/0x1d4 > [ 151.905037][ T1650] ret_from_fork+0x10/0x18 > [ 151.909324][ T1650] INFO: Slab 0x00000000406d65a6 objectsd usedd fp=0x000000004d988e71 flags=0x7ffffffc000200 > [ 151.919596][ T1650] INFO: Object 0x0000000040f4b79e @offset420325124116637824 fp=0x00000000e038adbf > [ 151.919596][ T1650] > [ 151.931079][ T1650] Redzone 00000000fc4c04f0: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 151.941168][ T1650] Redzone 000000009a25c019: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 151.951256][ T1650] Redzone 000000000b05c7cc: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 151.961345][ T1650] Redzone 00000000a08ae38b: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 151.971433][ T1650] Redzone 00000000e0eccd41: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 151.981520][ T1650] Redzone 0000000016ee2661: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 151.991608][ T1650] Redzone 000000009364e729: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 152.001695][ T1650] Redzone 00000000f2202456: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ > [ 152.011784][ T1650] Object 0000000040f4b79e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.021783][ T1650] Object 000000002df21fec: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.031779][ T1650] Object 0000000041cf0887: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.041775][ T1650] Object 00000000bfb91e8f: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.051770][ T1650] Object 00000000da315b1c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.061765][ T1650] Object 00000000b362de78: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.071761][ T1650] Object 00000000ad4f72bf: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.081756][ T1650] Object 00000000aa32d346: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.091751][ T1650] Object 00000000ad1cf22c: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.101746][ T1650] Object 000000001cee47e4: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.111741][ T1650] Object 00000000418720ed: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.121736][ T1650] Object 00000000dee1c3f2: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.131731][ T1650] Object 00000000a23397c1: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.141727][ T1650] Object 000000002ed01641: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.151721][ T1650] Object 00000000915ec720: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.161716][ T1650] Object 00000000915988c1: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.171711][ T1650] Object 000000004a0cc60f: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.181707][ T1650] Object 0000000054a294c9: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.191701][ T1650] Object 0000000054f61682: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.201697][ T1650] Object 0000000018d04328: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.211692][ T1650] Object 00000000703cf2c7: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.221687][ T1650] Object 000000004d3ac5d5: 6b 6b 6b 6b 6b 6b 6b 6b 00 00 00 00 00 00 00 00 kkkkkkkk........ > [ 152.231682][ T1650] Object 00000000726ce587: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.241676][ T1650] Object 00000000c709b64e: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.251672][ T1650] Object 0000000044d6a5c6: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.261667][ T1650] Object 000000009c76a6a2: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.271662][ T1650] Object 0000000033d01d12: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.281657][ T1650] Object 00000000c50ff26f: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.291652][ T1650] Object 00000000ebc3aaae: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.301647][ T1650] Object 00000000a2072fe3: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk > [ 152.311641][ T1650] Object 000000003d5911a3: 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkk. > [ 152.320942][ T1650] Redzone 000000009a2feac1: bb bb bb bb bb bb bb bb ........ > [ 152.330330][ T1650] Padding 00000000c1b3cb8b: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ > [ 152.340412][ T1650] Padding 000000003715421a: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ > [ 152.350493][ T1650] Padding 0000000066b51ba7: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ > [ 152.360575][ T1650] Padding 00000000ca240306: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZZZZZZZZZ > [ 152.370657][ T1650] Padding 0000000014a2af5d: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ > [ 152.380048][ T1650] CPU: 82 PID: 1650 Comm: kworker/82:1 Tainted: G B W 5.2.0-rc5-next-20190617 #18 > [ 152.390216][ T1650] Hardware name: HPE Apollo 70 /C01_APACHE_MB , BIOS L50_5.13_1.0.9 03/01/2019 > [ 152.400741][ T1650] Workqueue: memcg_kmem_cache memcg_kmem_cache_create_func > [ 152.407786][ T1650] Call trace: > [ 152.410926][ T1650] dump_backtrace+0x0/0x268 > [ 152.415280][ T1650] show_stack+0x20/0x2c > [ 152.419287][ T1650] dump_stack+0xb4/0x108 > [ 152.423384][ T1650] print_trailer+0x274/0x298 > [ 152.427825][ T1650] check_bytes_and_report+0xc4/0x118 > [ 152.432959][ T1650] check_object+0x2fc/0x36c > [ 152.437312][ T1650] alloc_debug_processing+0x154/0x240 > [ 152.442532][ T1650] ___slab_alloc+0x710/0xa68 > [ 152.446972][ T1650] kmem_cache_alloc+0x514/0x568 > [ 152.451672][ T1650] create_cache+0x6c/0x1bc > [ 152.455938][ T1650] memcg_create_kmem_cache+0xfc/0x11c > [ 152.461158][ T1650] memcg_kmem_cache_create_func+0x40/0x170 > [ 152.466814][ T1650] process_one_work+0x4e0/0xa54 > [ 152.471515][ T1650] worker_thread+0x498/0x650 > [ 152.475953][ T1650] kthread+0x1b8/0x1d4 > [ 152.479872][ T1650] ret_from_fork+0x10/0x18 > [ 152.484139][ T1650] FIX kmem_cache: Restoring 0x000000001fd6fdef-0x0000000007f6bb36=0x6b > [ 152.484139][ T1650] > [ 152.494395][ T1650] FIX kmem_cache: Marking all objects used Perhaps you can try with commit 94b655a10aaf ("mm: memcg/slab: don't check the dying flag on kmem_cache creation") picked out. Hillf