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Date: Fri, 20 Jan 2017 17:23:54 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Jens Axboe <axboe@...nel.dk>
Cc: kernel test robot <xiaolong.ye@...el.com>,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org,
linux-scsi@...r.kernel.org, tglx@...utronix.de,
linux-block@...r.kernel.org
Subject: Re: [lkp-robot] [rcu] b332151a29: kernel_BUG_at_mm/slab.c
On 2017-01-20 08:09:36 [-0800], Jens Axboe wrote:
> Is there a full trace of this?
[ 3.654003] scsi host0: scsi_debug: version 1.86 [20160430]
[ 3.654003] dev_size_mb=8, opts=0x0, submit_queues=1, statistics=0
[ 3.660755] scsi 0:0:0:0: Direct-Access Linux scsi_debug 0186 PQ: 0 ANSI: 7
[ 3.711231] sd 0:0:0:0: [sda] 16384 512-byte logical blocks: (8.39 MB/8.00 MiB)
[ 3.716202] sd 0:0:0:0: [sda] Write Protect is off
[ 3.717244] sd 0:0:0:0: [sda] Mode Sense: 73 00 10 08
[ 3.725059] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FUA
[ 3.795093] sd 0:0:0:0: [sda] Attached SCSI disk
[ 3.796686] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 3.804770] sd 0:0:0:0: [sda] 16384 512-byte logical blocks: (8.39 MB/8.00 MiB)
[ 3.809748] sd 0:0:0:0: [sda] Write Protect is off
[ 3.810806] sd 0:0:0:0: [sda] Mode Sense: 73 00 10 08
[ 3.818599] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FUA
[ 3.830894] kobject (be01a5fc): tried to init an initialized object, something is seriously wrong.
[ 3.832820] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 3.834172] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 3.835886] Workqueue: events_unbound async_run_entry_fn
[ 3.837028] 80079da8 83a5f6cc be01a5fc be01a5fc 80079dc4 83a61e33 842a883c be01a5fc
[ 3.838802] ffffffff 84397488 be01a108 80079dec 83a46afa be01a5d8 840670a0 be01a5d8
[ 3.840570] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 3.842350] Call Trace:
[ 3.842884] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 3.843834] [<83a61e33>] kobject_init+0x73/0x80
[ 3.844828] [<83a46afa>] blk_mq_register_dev+0x2a/0x110
[ 3.845971] [<83a3c857>] blk_register_queue+0x87/0x140
[ 3.847085] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 3.848170] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 3.849207] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 3.850313] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 3.851414] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 3.852552] [<83669759>] worker_thread+0x39/0x460
[ 3.853569] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 3.854717] [<8366f394>] kthread+0xb4/0xd0
[ 3.855611] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 3.856775] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.858066] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.859340] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 3.863951] kobject (ff0ca36c): tried to init an initialized object, something is seriously wrong.
[ 3.865875] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 3.867202] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 3.868924] Workqueue: events_unbound async_run_entry_fn
[ 3.870079] 80079da8 83a5f6cc ff0ca36c be01a5fc 80079dc4 83a61e33 842a883c ff0ca36c
[ 3.871846] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 3.873605] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 3.875395] Call Trace:
[ 3.875928] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 3.876878] [<83a61e33>] kobject_init+0x73/0x80
[ 3.877884] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 3.879018] [<83a3c857>] blk_register_queue+0x87/0x140
[ 3.880136] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 3.881227] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 3.882283] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 3.883381] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 3.884481] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 3.885613] [<83669759>] worker_thread+0x39/0x460
[ 3.886658] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 3.887791] [<8366f394>] kthread+0xb4/0xd0
[ 3.888680] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 3.889881] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.891189] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.892506] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 3.893563] kobject (ff21b36c): tried to init an initialized object, something is seriously wrong.
[ 3.895559] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 3.896938] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 3.898741] Workqueue: events_unbound async_run_entry_fn
[ 3.899911] 80079da8 83a5f6cc ff21b36c be01a5fc 80079dc4 83a61e33 842a883c ff21b36c
[ 3.901739] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 3.903558] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 3.905381] Call Trace:
[ 3.905936] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 3.906913] [<83a61e33>] kobject_init+0x73/0x80
[ 3.907931] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 3.909108] [<83a3c857>] blk_register_queue+0x87/0x140
[ 3.910267] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 3.911387] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 3.912466] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 3.913596] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 3.914735] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 3.915916] [<83669759>] worker_thread+0x39/0x460
[ 3.916977] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 3.918159] [<8366f394>] kthread+0xb4/0xd0
[ 3.919097] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 3.920322] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.921656] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.922992] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 3.924045] kobject (ff36c36c): tried to init an initialized object, something is seriously wrong.
[ 3.926026] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 3.927408] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 3.929193] Workqueue: events_unbound async_run_entry_fn
[ 3.930404] 80079da8 83a5f6cc ff36c36c be01a5fc 80079dc4 83a61e33 842a883c ff36c36c
[ 3.932214] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 3.934042] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 3.935857] Call Trace:
[ 3.936401] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 3.937382] [<83a61e33>] kobject_init+0x73/0x80
[ 3.938412] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 3.939579] [<83a3c857>] blk_register_queue+0x87/0x140
[ 3.940731] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 3.941848] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 3.942929] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 3.944063] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 3.945193] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 3.946371] [<83669759>] worker_thread+0x39/0x460
[ 3.947430] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 3.948599] [<8366f394>] kthread+0xb4/0xd0
[ 3.949522] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 3.950733] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.952053] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.953372] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 3.954436] kobject (ff4bd36c): tried to init an initialized object, something is seriously wrong.
[ 3.956391] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 3.957774] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 3.959548] Workqueue: events_unbound async_run_entry_fn
[ 3.960737] 80079da8 83a5f6cc ff4bd36c be01a5fc 80079dc4 83a61e33 842a883c ff4bd36c
[ 3.962558] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 3.964369] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 3.966196] Call Trace:
[ 3.966740] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 3.967738] [<83a61e33>] kobject_init+0x73/0x80
[ 3.968754] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 3.969934] [<83a3c857>] blk_register_queue+0x87/0x140
[ 3.971079] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 3.972194] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 3.973268] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 3.974407] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 3.975531] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 3.976695] [<83669759>] worker_thread+0x39/0x460
[ 3.977768] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 3.978932] [<8366f394>] kthread+0xb4/0xd0
[ 3.979844] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 3.981057] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.982395] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 3.983714] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 3.984762] kobject (ff60e36c): tried to init an initialized object, something is seriously wrong.
[ 3.986726] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 3.988103] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 3.989879] Workqueue: events_unbound async_run_entry_fn
[ 3.991076] 80079da8 83a5f6cc ff60e36c be01a5fc 80079dc4 83a61e33 842a883c ff60e36c
[ 3.992896] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 3.994719] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 3.996516] Call Trace:
[ 3.997057] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 3.998047] [<83a61e33>] kobject_init+0x73/0x80
[ 3.999058] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 4.000233] [<83a3c857>] blk_register_queue+0x87/0x140
[ 4.001399] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 4.002516] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.003578] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.004707] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.005835] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.006950] [<83669759>] worker_thread+0x39/0x460
[ 4.007965] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.009076] [<8366f394>] kthread+0xb4/0xd0
[ 4.009963] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.011120] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.012379] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.013655] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.014676] kobject (ff75f36c): tried to init an initialized object, something is seriously wrong.
[ 4.016562] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 4.017923] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.019768] Workqueue: events_unbound async_run_entry_fn
[ 4.020980] 80079da8 83a5f6cc ff75f36c be01a5fc 80079dc4 83a61e33 842a883c ff75f36c
[ 4.022862] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 4.024742] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 4.026624] Call Trace:
[ 4.027185] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 4.028181] [<83a61e33>] kobject_init+0x73/0x80
[ 4.029199] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 4.030390] [<83a3c857>] blk_register_queue+0x87/0x140
[ 4.031550] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 4.032672] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.033755] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.034895] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.036027] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.037197] [<83669759>] worker_thread+0x39/0x460
[ 4.038275] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.039444] [<8366f394>] kthread+0xb4/0xd0
[ 4.040379] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.041625] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.042951] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.044271] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.045327] kobject (ff8b036c): tried to init an initialized object, something is seriously wrong.
[ 4.047323] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 4.048707] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.050501] Workqueue: events_unbound async_run_entry_fn
[ 4.051689] 80079da8 83a5f6cc ff8b036c be01a5fc 80079dc4 83a61e33 842a883c ff8b036c
[ 4.053517] 80079dc4 84397474 be01a108 80079dec 83a46b1c be01a5d8 840670a0 be01a5d8
[ 4.055352] be01a108 bd983468 be01a108 bd983470 be01a5d8 80079e14 83a3c857 be01a5d8
[ 4.057173] Call Trace:
[ 4.057732] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 4.058722] [<83a61e33>] kobject_init+0x73/0x80
[ 4.059738] [<83a46b1c>] blk_mq_register_dev+0x4c/0x110
[ 4.060907] [<83a3c857>] blk_register_queue+0x87/0x140
[ 4.062073] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 4.063205] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.064286] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.065427] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.066569] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.067749] [<83669759>] worker_thread+0x39/0x460
[ 4.068805] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.070001] [<8366f394>] kthread+0xb4/0xd0
[ 4.070946] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.072153] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.073487] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.074829] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.075943] ------------[ cut here ]------------
[ 4.076984] WARNING: CPU: 6 PID: 6 at include/linux/kref.h:46 kobject_get+0x7f/0x90
[ 4.079356] CPU: 6 PID: 6 Comm: kworker/u14:0 Not tainted 4.9.0 #86
[ 4.080746] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.082548] Workqueue: events_unbound async_run_entry_fn
[ 4.083731] 80079ce8 83a5f6cc 00000000 84268d0c 80079d18 83654c82 84268e68 00000006
[ 4.085551] 00000006 84268d0c 0000002e 83a61ebf 0000002e bd917554 00000000 bd917400
[ 4.087383] 80079d2c 83654d41 00000009 00000000 00000000 80079d4c 83a61ebf 3b1c2000
[ 4.089206] Call Trace:
[ 4.089765] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 4.090772] [<83654c82>] __warn+0xe2/0x100
[ 4.091695] [<83a61ebf>] ? kobject_get+0x7f/0x90
[ 4.092748] [<83654d41>] warn_slowpath_null+0x21/0x30
[ 4.093907] [<83a61ebf>] kobject_get+0x7f/0x90
[ 4.094933] [<83a624ae>] kobject_add_internal+0x2e/0x2d0
[ 4.096131] [<83713de8>] ? kfree_const+0x18/0x20
[ 4.097163] [<83a61d7b>] ? kobject_set_name_vargs+0x6b/0x90
[ 4.098434] [<83a62785>] kobject_add+0x35/0x80
[ 4.099435] [<83a46951>] blk_mq_register_hctx+0x91/0xb0
[ 4.100626] [<83a46b97>] blk_mq_register_dev+0xc7/0x110
[ 4.101819] [<83a3c857>] blk_register_queue+0x87/0x140
[ 4.102963] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 4.104081] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.105167] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.106309] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.107448] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.108629] [<83669759>] worker_thread+0x39/0x460
[ 4.109696] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.110886] [<8366f394>] kthread+0xb4/0xd0
[ 4.111813] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.113022] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.114360] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.115688] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.117286] ---[ end trace 0425d358b6d5b2f0 ]---
[ 4.145499] sd 0:0:0:0: [sda] Attached SCSI disk
[ 4.147003] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 4.177323] scsi host0: scsi_debug: version 1.86 [20160430]
[ 4.177323] dev_size_mb=8, opts=0x0, submit_queues=1, statistics=0
[ 4.180742] scsi 0:0:0:0: Direct-Access Linux scsi_debug 0186 PQ: 0 ANSI: 7
[ 4.254491] sd 0:0:0:0: [sda] 16384 512-byte logical blocks: (8.39 MB/8.00 MiB)
[ 4.259480] sd 0:0:0:0: [sda] Write Protect is off
[ 4.260536] sd 0:0:0:0: [sda] Mode Sense: 73 00 10 08
[ 4.268380] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FUA
[ 4.311266] Slab corruption (Tainted: G W ): kmalloc-32 start=803d3420, len=32
[ 4.313051] 000: 73 64 61 00 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a sda.ZZZZZZZZZZZZ
[ 4.314719] 010: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5 ZZZZZZZZZZZZZZZ.
[ 4.316351] Prev obj: start=803d3400, len=32
[ 4.317265] 000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 4.318920] 010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
[ 4.320546] Next obj: start=803d3440, len=32
[ 4.321482] 000: 72 65 71 75 65 73 74 5f 73 6f 63 6b 5f 54 43 50 request_sock_TCP
[ 4.323133] 010: 00 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5 .ZZZZZZZZZZZZZZ.
[ 4.351856] sd 0:0:0:0: [sda] Attached SCSI disk
[ 4.353307] sd 0:0:0:0: [sda] Synchronizing SCSI cache
[ 4.355710] Slab corruption (Tainted: G W ): kmalloc-32 start=803d36e0, len=32
[ 4.357519] 000: 32 35 30 3a 30 00 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 250:0.ZZZZZZZZZZ
[ 4.359148] 010: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5 ZZZZZZZZZZZZZZZ.
[ 4.360790] Prev obj: start=803d36c0, len=32
[ 4.361390] sd 0:0:0:0: [sda] 16384 512-byte logical blocks: (8.39 MB/8.00 MiB)
[ 4.363279] 000: 30 30 3a 30 31 00 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 00:01.ZZZZZZZZZZ
[ 4.364780] sd 0:0:0:0: [sda] Write Protect is off
[ 4.364782] sd 0:0:0:0: [sda] Mode Sense: 73 00 10 08
[ 4.367051] 010: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5 ZZZZZZZZZZZZZZZ.
[ 4.368712] Next obj: start=803d3700, len=32
[ 4.369642] 000: 30 3a 30 3a 30 3a 30 00 5a 5a 5a 5a 5a 5a 5a 5a 0:0:0:0.ZZZZZZZZ
[ 4.371290] 010: [ 4.371499] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, supports DPO and FUA
[ 4.373485] 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5 ZZZZZZZZZZZZZZZ.
[ 4.377287] Slab corruption (Tainted: G W ): kmalloc-32 start=be7f4d80, len=32
[ 4.379068] 000: 30 3a 30 3a 30 3a 30 00 5a 5a 5a 5a 5a 5a 5a 5a 0:0:0:0.ZZZZZZZZ
[ 4.380719] 010: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a a5 ZZZZZZZZZZZZZZZ.
[ 4.381641] ------------[ cut here ]------------
[ 4.381646] WARNING: CPU: 6 PID: 6 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x60/0x80
[ 4.381647] sysfs: cannot create duplicate filename '/class/block/sda'
[ 4.381649] CPU: 6 PID: 6 Comm: kworker/u14:0 Tainted: G W 4.9.0 #86
[ 4.381650] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.381653] Workqueue: events_unbound async_run_entry_fn
[ 4.381657] 80079d34 83a5f6cc 80079d78 842785c8 80079d64 83654c82 84278594 80079d94
[ 4.381662] 00000006 842785c8 0000001f 837b89e0 0000001f be427000 be7f4040 8027ef80
[ 4.381666] 80079d80 83654cd4 00000009 00000000 80079d78 84278594 80079d94 80079da8
[ 4.381666] Call Trace:
[ 4.381669] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 4.381673] [<83654c82>] __warn+0xe2/0x100
[ 4.381675] [<837b89e0>] ? sysfs_warn_dup+0x60/0x80
[ 4.381676] [<83654cd4>] warn_slowpath_fmt+0x34/0x40
[ 4.381678] [<837b89e0>] sysfs_warn_dup+0x60/0x80
[ 4.381680] [<837b8cb6>] sysfs_do_create_link_sd.isra.0+0xb6/0xd0
[ 4.381682] [<837b8d10>] sysfs_create_link+0x20/0x40
[ 4.381686] [<83b8469f>] device_add+0x1df/0x5d0
[ 4.381688] [<83713eb8>] ? kstrdup_const+0x18/0x20
[ 4.381690] [<83a6eb49>] ? kvasprintf_const+0x59/0x90
[ 4.381692] [<83713de8>] ? kfree_const+0x18/0x20
[ 4.381694] [<83a61d7b>] ? kobject_set_name_vargs+0x6b/0x90
[ 4.381696] [<83a49c6f>] device_add_disk+0x1bf/0x470
[ 4.381699] [<83b92c06>] ? __pm_runtime_use_autosuspend+0x56/0x70
[ 4.381703] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.381704] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.381707] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.381708] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.381710] [<83669759>] worker_thread+0x39/0x460
[ 4.381712] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.381713] [<8366f394>] kthread+0xb4/0xd0
[ 4.381716] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.381718] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381719] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381721] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.381722] ---[ end trace 0425d358b6d5b2f1 ]---
[ 4.381738] ------------[ cut here ]------------
[ 4.381740] WARNING: CPU: 6 PID: 6 at lib/kobject.c:244 kobject_add_internal+0xf0/0x2d0
[ 4.381741] kobject_add_internal failed for queue (error: -2 parent: sda)
[ 4.381742] CPU: 6 PID: 6 Comm: kworker/u14:0 Tainted: G W 4.9.0 #86
[ 4.381743] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.381745] Workqueue: events_unbound async_run_entry_fn
[ 4.381749] 80079d4c 83a5f6cc 80079d90 842a88e0 80079d7c 83654c82 842a8a40 80079dac
[ 4.381753] 00000006 842a88e0 000000f4 83a62570 000000f4 be01ade0 00000000 bd983870
[ 4.381757] 80079d98 83654cd4 00000009 00000000 80079d90 842a8a40 80079dac 80079dd0
[ 4.381758] Call Trace:
[ 4.381760] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 4.381761] [<83654c82>] __warn+0xe2/0x100
[ 4.381763] [<83a62570>] ? kobject_add_internal+0xf0/0x2d0
[ 4.381765] [<83654cd4>] warn_slowpath_fmt+0x34/0x40
[ 4.381767] [<83a62570>] kobject_add_internal+0xf0/0x2d0
[ 4.381768] [<83a62785>] kobject_add+0x35/0x80
[ 4.381770] [<83713eb8>] ? kstrdup_const+0x18/0x20
[ 4.381773] [<83a3c834>] blk_register_queue+0x64/0x140
[ 4.381775] [<83a49c7e>] device_add_disk+0x1ce/0x470
[ 4.381777] [<83b92c06>] ? __pm_runtime_use_autosuspend+0x56/0x70
[ 4.381779] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.381780] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.381782] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.381784] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.381785] [<83669759>] worker_thread+0x39/0x460
[ 4.381787] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.381788] [<8366f394>] kthread+0xb4/0xd0
[ 4.381790] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.381792] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381793] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381795] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.381795] ---[ end trace 0425d358b6d5b2f2 ]---
[ 4.381796] ------------[ cut here ]------------
[ 4.381798] WARNING: CPU: 6 PID: 6 at block/genhd.c:632 device_add_disk+0x3ef/0x470
[ 4.381800] CPU: 6 PID: 6 Comm: kworker/u14:0 Tainted: G W 4.9.0 #86
[ 4.381800] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.381802] Workqueue: events_unbound async_run_entry_fn
[ 4.381806] 80079dd0 83a5f6cc 00000000 842a6920 80079e00 83654c82 84268e68 00000006
[ 4.381810] 00000006 842a6920 00000278 83a49e9f 00000278 bd983800 bd983868 bd983870
[ 4.381814] 80079e14 83654d41 00000009 00000000 00000000 80079e54 83a49e9f bd983868
[ 4.381814] Call Trace:
[ 4.381816] [<83a5f6cc>] dump_stack+0x58/0x7c
[ 4.381818] [<83654c82>] __warn+0xe2/0x100
[ 4.381819] [<83a49e9f>] ? device_add_disk+0x3ef/0x470
[ 4.381821] [<83654d41>] warn_slowpath_null+0x21/0x30
[ 4.381823] [<83a49e9f>] device_add_disk+0x3ef/0x470
[ 4.381825] [<83b92c06>] ? __pm_runtime_use_autosuspend+0x56/0x70
[ 4.381827] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.381828] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.381830] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.381831] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.381833] [<83669759>] worker_thread+0x39/0x460
[ 4.381835] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.381836] [<8366f394>] kthread+0xb4/0xd0
[ 4.381838] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.381839] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381841] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381842] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.381843] ---[ end trace 0425d358b6d5b2f3 ]---
[ 4.381851] ------------[ cut here ]------------
[ 4.381852] kernel BUG at fs/sysfs/file.c:330!
[ 4.381853] invalid opcode: 0000 [#1] PREEMPT SMP
[ 4.381854] CPU: 6 PID: 6 Comm: kworker/u14:0 Tainted: G W 4.9.0 #86
[ 4.381855] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.10.1-1 04/01/2014
[ 4.381856] Workqueue: events_unbound async_run_entry_fn
[ 4.381857] task: 80076300 task.stack: 80078000
[ 4.381858] EIP: 0060:[<837b86b0>] EFLAGS: 00210246 CPU: 6
[ 4.381860] EIP is at sysfs_create_file_ns+0x30/0x40
[ 4.381861] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 84026764
[ 4.381862] ESI: bd983870 EDI: 84397640 EBP: 80079e14 ESP: 80079dfc
[ 4.381863] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 4.381864] CR0: 80050033 CR2: ffffffff CR3: 04617000 CR4: 000006b0
[ 4.381867] Stack:
[ 4.381871] 837b87cf 80079e14 bd983870 bd983800 bd983868 bd983870 80079e54 83a49cc7
[ 4.381874] bd983868 8429adcd bd98380c bd983800 be01a910 bd98380c 00800000 83b92c06
[ 4.381878] be01a910 bd925800 bd983800 be429400 bd925800 bd983800 80079e80 83c3d328
[ 4.381878] Call Trace:
[ 4.381880] [<837b87cf>] ? sysfs_create_files+0x2f/0x90
[ 4.381882] [<83a49cc7>] device_add_disk+0x217/0x470
[ 4.381884] [<83b92c06>] ? __pm_runtime_use_autosuspend+0x56/0x70
[ 4.381885] [<83c3d328>] sd_probe_async+0xe8/0x1b0
[ 4.381887] [<83672347>] async_run_entry_fn+0x37/0xe0
[ 4.381888] [<836694f7>] process_one_work+0x1b7/0x3e0
[ 4.381890] [<8366947c>] ? process_one_work+0x13c/0x3e0
[ 4.381891] [<83669759>] worker_thread+0x39/0x460
[ 4.381893] [<83669720>] ? process_one_work+0x3e0/0x3e0
[ 4.381894] [<8366f394>] kthread+0xb4/0xd0
[ 4.381896] [<83f8cb4d>] ? _raw_spin_unlock_irq+0x2d/0x50
[ 4.381897] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381898] [<8366f2e0>] ? __kthread_create_on_node+0x160/0x160
[ 4.381900] [<83f8d363>] ret_from_fork+0x1b/0x28
[ 4.381921] Code: 40 18 85 c0 74 25 85 d2 74 21 55 89 e5 83 ec 08 89 4c 24 04 0f b7 4a 04 89 0c 24 31 c9 e8 99 fd ff ff c9 c3 8d b4 26 00 00 00 00 <0f> 0b 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 55 89 e5 56 89
[ 4.381923] EIP: [<837b86b0>]
[ 4.381924] sysfs_create_file_ns+0x30/0x40
[ 4.381924] SS:ESP 0068:80079dfc
[ 4.381928] ---[ end trace 0425d358b6d5b2f4 ]---
[ 4.381929] Kernel panic - not syncing: Fatal exception
[ 4.382334] Kernel Offset: 0x2600000 from 0x81000000 (relocation range: 0x80000000-0xc07d4fff)
[ 4.439732] ---[ end Kernel panic - not syncing: Fatal exception
> > yes. With and without the patch there is a lot of wrong stuff like
> > complains about a kobject initialized again. This leads to a double free
> > at some point.
>
> And what patch are we talking about? I don't mind being CC'ed into a thread,
> but some context and background would be immensely helpful here...
The patch is irrelevant. lkp-robot found a bug which was there before
the patch in question but the pattern changed so it blamed the Author.
It triggers even v4.9 with
CONFIG_SCSI_DEBUG
CONFIG_DEBUG_TEST_DRIVER_REMOVE
CONFIG_SCSI_MQ_DEFAULT
enabled and CONFIG_SCSI_DEBUG is simply a SCSI host controller which is
always there. I can send you a complete config against current HEAD
which boots in kvm if you want.
Sebastian
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