Date:	Tue, 08 Jul 2014 16:59:59 +0800
From:	Aaron Lu <aaron.lu@...el.com>
To:	Maurizio Lombardi <mlombard@...hat.com>
CC:	Jens Axboe <axboe@...com>, Ming Lei <ming.lei@...onical.com>,
	Jet Chen <jet.chen@...el.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [Merge branch 'for] BUG: unable to handle kernel NULL pointer dereference
 at 0000000000000028

The merge 49b3f10e2cf5c1c25d2ce33ab255cff8a8096ce6 seems to have only one
commit: 254c4407cb84a6dec90336054615b0f0e996bb7c, so I added you guys in.
Please take a look if this is a real problem, thanks.

FYI, we noticed the below changes on

git://git.kernel.dk/linux-block.git for-next
commit 49b3f10e2cf5c1c25d2ce33ab255cff8a8096ce6 ("Merge branch 'for-3.17/core' into for-next")

+------------------------------------------------------+------------+------------+
|                                                      | 45c1010407 | 49b3f10e2c |
+------------------------------------------------------+------------+------------+
| boot_successes                                       | 40         | 10         |
| boot_failures                                        | 21         | 15         |
| BUG:kernel_early_hang_without_any_printk_output      | 21         | 1          |
| kernel_BUG_at_fs/direct-io.c                         | 0          | 10         |
| invalid_opcode                                       | 0          | 14         |
| RIP:dio_send_cur_page                                | 0          | 10         |
| Kernel_panic-not_syncing:Fatal_exception             | 0          | 14         |
| backtrace:vfs_write                                  | 0          | 10         |
| backtrace:SyS_pwrite64                               | 0          | 10         |
| BUG:unable_to_handle_kernel_NULL_pointer_dereference | 0          | 4          |
| Oops                                                 | 0          | 4          |
| RIP:blk_throtl_drain                                 | 0          | 4          |
| kernel_BUG_at_arch/x86/mm/pageattr.c                 | 0          | 4          |
| RIP:change_page_attr_set_clr                         | 0          | 4          |
| backtrace:scsi_debug_exit                            | 0          | 4          |
| backtrace:SyS_delete_module                          | 0          | 4          |
+------------------------------------------------------+------------+------------+


[ 1010.593031]  sda: unknown partition table
[ 1010.598052] sd 2:0:0:0: [sda] Attached SCSI disk
[ 1012.893125] sd 2:0:0:0: [sda] Synchronizing SCSI cache
[ 1012.895934] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028
[ 1012.896336] IP: [<ffffffff813cf880>] blk_throtl_drain+0x30/0x150
[ 1012.896336] PGD 0 
[ 1012.896336] Oops: 0000 [#1] SMP 
[ 1012.896336] Modules linked in: sd_mod scsi_debug(-) crct10dif_generic crc_t10dif crct10dif_common loop ipmi_watchdog ipmi_msghandler dm_mod fuse sg sr_mod cdrom ata_generic pata_acpi parport_pc parport floppy snd_pcm snd_timer snd cirrus ata_piix soundcore syscopyarea pcspkr sysfillrect sysimgblt ttm drm_kms_helper libata drm i2c_piix4
[ 1012.896336] CPU: 1 PID: 8020 Comm: rmmod Not tainted 3.16.0-rc3-01927-ge376abf #1
[ 1012.896336] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1012.896336] task: ffff8801151a0000 ti: ffff880079668000 task.ti: ffff880079668000
[ 1012.896336] RIP: 0010:[<ffffffff813cf880>]  [<ffffffff813cf880>] blk_throtl_drain+0x30/0x150
[ 1012.896336] RSP: 0018:ffff88007966bb60  EFLAGS: 00010046
[ 1012.896336] RAX: 0000000000000000 RBX: ffff8800bdbba6e8 RCX: ffff88007dea1a20
[ 1012.896336] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1012.896336] RBP: ffff88007966bb78 R08: 0000000000000000 R09: 0000000000000046
[ 1012.896336] R10: ffff88007966bb78 R11: 0000000000000246 R12: ffff8800bdbba6e8
[ 1012.896336] R13: ffff880091ba3800 R14: ffff8800bdbbad40 R15: ffff880030a13120
[ 1012.896336] FS:  00007fa159320700(0000) GS:ffff88011fc80000(0000) knlGS:0000000000000000
[ 1012.896336] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1012.896336] CR2: 0000000000000028 CR3: 000000007f42e000 CR4: 00000000000006e0
[ 1012.896336] Stack:
[ 1012.896336]  ffff8800bdbba6e8 0000000000000000 ffff8800bdbbad50 ffff88007966bb88
[ 1012.896336]  ffffffff813cc8ce ffff88007966bbb8 ffffffff813b1aac ffff8800bdbba6e8
[ 1012.896336]  ffffffff81cf9200 ffff8800bdbba6e8 ffff880030a13000 ffff88007966bbd0
[ 1012.896336] Call Trace:
[ 1012.896336]  [<ffffffff813cc8ce>] blkcg_drain_queue+0xe/0x10
[ 1012.896336]  [<ffffffff813b1aac>] __blk_drain_queue+0x7c/0x180
[ 1012.896336]  [<ffffffff813b1c3e>] blk_queue_bypass_start+0x8e/0xd0
[ 1012.896336]  [<ffffffff813cba88>] blkcg_deactivate_policy+0x38/0x140
[ 1012.896336]  [<ffffffff813cfad4>] blk_throtl_exit+0x34/0x50
[ 1012.896336]  [<ffffffff813cc918>] blkcg_exit_queue+0x48/0x70
[ 1012.896336]  [<ffffffff813b5306>] blk_release_queue+0x26/0x100
[ 1012.896336]  [<ffffffff813dd9e7>] kobject_cleanup+0x77/0x1b0
[ 1012.896336]  [<ffffffff813dd898>] kobject_put+0x28/0x60
[ 1012.896336]  [<ffffffff813ae945>] blk_put_queue+0x15/0x20
[ 1012.896336]  [<ffffffff8151e6bb>] scsi_device_dev_release_usercontext+0xbb/0x120
[ 1012.896336]  [<ffffffff81087647>] execute_in_process_context+0x67/0x70
[ 1012.896336]  [<ffffffff8151e5fc>] scsi_device_dev_release+0x1c/0x20
[ 1012.896336]  [<ffffffff814dfab2>] device_release+0x32/0xa0
[ 1012.896336]  [<ffffffff813dd9e7>] kobject_cleanup+0x77/0x1b0
[ 1012.896336]  [<ffffffff813dd898>] kobject_put+0x28/0x60
[ 1012.896336]  [<ffffffff814dfda7>] put_device+0x17/0x20
[ 1012.896336]  [<ffffffff8151f109>] __scsi_remove_device+0xa9/0xe0
[ 1012.896336]  [<ffffffff8151d6b4>] scsi_forget_host+0x64/0x70
[ 1012.896336]  [<ffffffff81511bb7>] scsi_remove_host+0x77/0x120
[ 1012.896336]  [<ffffffffa01e15a9>] sdebug_driver_remove+0x29/0x90 [scsi_debug]
[ 1012.896336]  [<ffffffff814e403f>] __device_release_driver+0x7f/0xf0
[ 1012.896336]  [<ffffffff814e40d3>] device_release_driver+0x23/0x30
[ 1012.896336]  [<ffffffff814e39d8>] bus_remove_device+0x108/0x180
[ 1012.896336]  [<ffffffff814e02d9>] device_del+0x129/0x1c0
[ 1012.896336]  [<ffffffff814e038e>] device_unregister+0x1e/0x60
[ 1012.896336]  [<ffffffffa01e0efc>] sdebug_remove_adapter+0x4c/0x70 [scsi_debug]
[ 1012.896336]  [<ffffffffa01e552d>] scsi_debug_exit+0x19/0xaec [scsi_debug]
[ 1012.896336]  [<ffffffff810ea51e>] SyS_delete_module+0x12e/0x1c0
[ 1012.896336]  [<ffffffff810536b9>] ? do_async_page_fault+0x29/0xe0
[ 1012.896336]  [<ffffffff81836b88>] ? async_page_fault+0x28/0x30
[ 1012.896336]  [<ffffffff81834ba9>] system_call_fastpath+0x16/0x1b
[ 1012.896336] Code: 55 65 ff 04 25 a0 c7 00 00 48 89 e5 41 55 41 54 49 89 fc 53 4c 8b af 40 07 00 00 49 8b 85 a0 00 00 00 31 ff 48 8b 80 c8 05 00 00 <48> 8b 70 28 e8 37 7f d2 ff 48 85 c0 48 89 c3 74 61 0f 1f 80 00 
[ 1012.896336] RIP  [<ffffffff813cf880>] blk_throtl_drain+0x30/0x150
[ 1012.896336]  RSP <ffff88007966bb60>
[ 1012.896336] CR2: 0000000000000028
[ 1012.896336] ------------[ cut here ]------------
[ 1012.896336] kernel BUG at arch/x86/mm/pageattr.c:216!
[ 1012.896336] invalid opcode: 0000 [#2] SMP 
[ 1012.896336] Modules linked in: sd_mod scsi_debug(-) crct10dif_generic crc_t10dif crct10dif_common loop ipmi_watchdog ipmi_msghandler dm_mod fuse sg sr_mod cdrom ata_generic pata_acpi parport_pc parport floppy snd_pcm snd_timer snd cirrus ata_piix soundcore syscopyarea pcspkr sysfillrect sysimgblt ttm drm_kms_helper libata drm i2c_piix4
[ 1012.896336] CPU: 1 PID: 8020 Comm: rmmod Not tainted 3.16.0-rc3-01927-ge376abf #1
[ 1012.896336] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1012.896336] task: ffff8801151a0000 ti: ffff880079668000 task.ti: ffff880079668000
[ 1012.896336] RIP: 0010:[<ffffffff8105bbd3>]  [<ffffffff8105bbd3>] change_page_attr_set_clr+0x433/0x440
[ 1012.896336] RSP: 0018:ffff88007966aec8  EFLAGS: 00010046
[ 1012.896336] RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000010
[ 1012.896336] RDX: 0000000000002200 RSI: 0000000000000000 RDI: 0000000080000000
[ 1012.896336] RBP: ffff88007966af58 R08: 800000007c3c2163 R09: 000000000007c3c2
[ 1012.896336] R10: ffffea0001f58000 R11: ffffffff813db659 R12: 0000000000000000
[ 1012.896336] R13: 0000000000000010 R14: 0000000000000004 R15: 0000000000000005
[ 1012.896336] FS:  00007fa159320700(0000) GS:ffff88011fc80000(0000) knlGS:0000000000000000
[ 1012.896336] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1012.896336] CR2: 0000000000000028 CR3: 000000007f42e000 CR4: 00000000000006e0
[ 1012.896336] Stack:
[ 1012.896336]  0000000200000000 0000000000000000 0000000000000000 ffff880100000200
[ 1012.896336]  ffff8801151a0000 0000000000000000 0000000000000000 0000000000000010
[ 1012.896336]  0000000000000000 0000000500000001 000000000007c3c2 0000020000000000
[ 1012.896336] Call Trace:
[ 1012.896336]  [<ffffffff8105bf26>] _set_pages_array+0xe6/0x130
[ 1012.896336]  [<ffffffff8105bfa3>] set_pages_array_wc+0x13/0x20
[ 1012.896336]  [<ffffffffa00ca02f>] ttm_set_pages_caching+0x2f/0x70 [ttm]
[ 1012.896336]  [<ffffffffa00ca174>] ttm_alloc_new_pages.isra.6+0xb4/0x180 [ttm]
[ 1012.896336]  [<ffffffffa00caa63>] ttm_pool_populate+0x3c3/0x4d0 [ttm]
[ 1012.896336]  [<ffffffffa00e920e>] cirrus_ttm_tt_populate+0xe/0x10 [cirrus]
[ 1012.896336]  [<ffffffffa00c7571>] ttm_bo_move_memcpy+0x5d1/0x680 [ttm]
[ 1012.896336]  [<ffffffff8118dffe>] ? map_vm_area+0x2e/0x40
[ 1012.896336]  [<ffffffffa00c3289>] ? ttm_tt_init+0x69/0xb0 [ttm]
[ 1012.896336]  [<ffffffffa00e91b8>] cirrus_bo_move+0x18/0x20 [cirrus]
[ 1012.896336]  [<ffffffffa00c4d45>] ttm_bo_handle_move_mem+0x265/0x5b0 [ttm]
[ 1012.896336]  [<ffffffffa00c56a6>] ? ttm_bo_mem_space+0x116/0x340 [ttm]
[ 1012.896336]  [<ffffffffa00c5d6f>] ttm_bo_validate+0x21f/0x230 [ttm]
[ 1012.896336]  [<ffffffffa00e99a2>] cirrus_bo_push_sysram+0x82/0xe0 [cirrus]
[ 1012.896336]  [<ffffffffa00e7bf5>] cirrus_crtc_do_set_base.isra.8.constprop.10+0x75/0x400 [cirrus]
[ 1012.896336]  [<ffffffffa00e83c9>] cirrus_crtc_mode_set+0x449/0x4d0 [cirrus]
[ 1012.896336]  [<ffffffffa00588e9>] drm_crtc_helper_set_mode+0x2b9/0x4f0 [drm_kms_helper]
[ 1012.896336]  [<ffffffffa005966f>] drm_crtc_helper_set_config+0x87f/0xaa0 [drm_kms_helper]
[ 1012.896336]  [<ffffffff818325fe>] ? __ww_mutex_lock+0x2e/0xaa
[ 1012.896336]  [<ffffffffa001a124>] drm_mode_set_config_internal+0x64/0xf0 [drm]
[ 1012.896336]  [<ffffffffa005c324>] drm_fb_helper_pan_display+0x94/0xf0 [drm_kms_helper]
[ 1012.896336]  [<ffffffff8143f959>] fb_pan_display+0xc9/0x190
[ 1012.896336]  [<ffffffff81439b10>] bit_update_start+0x20/0x50
[ 1012.896336]  [<ffffffff814395c2>] fbcon_switch+0x3a2/0x550
[ 1012.896336]  [<ffffffff814b10d9>] redraw_screen+0x189/0x240
[ 1012.896336]  [<ffffffff8143fcce>] ? fb_blank+0x9e/0xc0
[ 1012.896336]  [<ffffffff81436b5a>] fbcon_blank+0x20a/0x2d0
[ 1012.896336]  [<ffffffff810c91cc>] ? wake_up_klogd+0x3c/0x50
[ 1012.896336]  [<ffffffff810c93d8>] ? console_unlock+0x1f8/0x440
[ 1012.896336]  [<ffffffff81079133>] ? __internal_add_timer+0x113/0x130
[ 1012.896336]  [<ffffffff8107917f>] ? internal_add_timer+0x2f/0x70
[ 1012.896336]  [<ffffffff8107b1b2>] ? mod_timer+0x142/0x1f0
[ 1012.896336]  [<ffffffff814b1bf8>] do_unblank_screen+0xb8/0x200
[ 1012.896336]  [<ffffffff814b1d50>] unblank_screen+0x10/0x20
[ 1012.896336]  [<ffffffff813ea3c9>] bust_spinlocks+0x19/0x40
[ 1012.896336]  [<ffffffff81017718>] oops_end+0x38/0x150
[ 1012.896336]  [<ffffffff81823e09>] no_context+0x2b3/0x2c0
[ 1012.896336]  [<ffffffff81823e89>] __bad_area_nosemaphore+0x73/0x1ca
[ 1012.896336]  [<ffffffff81823ff3>] bad_area_nosemaphore+0x13/0x15
[ 1012.896336]  [<ffffffff81058c90>] __do_page_fault+0x90/0x550
[ 1012.896336]  [<ffffffff810a6148>] ? __enqueue_entity+0x78/0x80
[ 1012.896336]  [<ffffffff810acca1>] ? enqueue_entity+0x291/0xba0
[ 1012.896336]  [<ffffffff81053d47>] ? kvm_clock_read+0x27/0x40
[ 1012.896336]  [<ffffffff810abc32>] ? check_preempt_wakeup+0x162/0x230
[ 1012.896336]  [<ffffffff8109e715>] ? check_preempt_curr+0x85/0xa0
[ 1012.896336]  [<ffffffff8109e749>] ? ttwu_do_wakeup+0x19/0xe0
[ 1012.896336]  [<ffffffff81059201>] trace_do_page_fault+0x41/0x130
[ 1012.896336]  [<ffffffff810536b9>] do_async_page_fault+0x29/0xe0
[ 1012.896336]  [<ffffffff81836b88>] async_page_fault+0x28/0x30
[ 1012.896336]  [<ffffffff813cf880>] ? blk_throtl_drain+0x30/0x150
[ 1012.896336]  [<ffffffff813cc8ce>] blkcg_drain_queue+0xe/0x10
[ 1012.896336]  [<ffffffff813b1aac>] __blk_drain_queue+0x7c/0x180
[ 1012.896336]  [<ffffffff813b1c3e>] blk_queue_bypass_start+0x8e/0xd0
[ 1012.896336]  [<ffffffff813cba88>] blkcg_deactivate_policy+0x38/0x140
[ 1012.896336]  [<ffffffff813cfad4>] blk_throtl_exit+0x34/0x50
[ 1012.896336]  [<ffffffff813cc918>] blkcg_exit_queue+0x48/0x70
[ 1012.896336]  [<ffffffff813b5306>] blk_release_queue+0x26/0x100
[ 1012.896336]  [<ffffffff813dd9e7>] kobject_cleanup+0x77/0x1b0
[ 1012.896336]  [<ffffffff813dd898>] kobject_put+0x28/0x60
[ 1012.896336]  [<ffffffff813ae945>] blk_put_queue+0x15/0x20
[ 1012.896336]  [<ffffffff8151e6bb>] scsi_device_dev_release_usercontext+0xbb/0x120
[ 1012.896336]  [<ffffffff81087647>] execute_in_process_context+0x67/0x70
[ 1012.896336]  [<ffffffff8151e5fc>] scsi_device_dev_release+0x1c/0x20
[ 1012.896336]  [<ffffffff814dfab2>] device_release+0x32/0xa0
[ 1012.896336]  [<ffffffff813dd9e7>] kobject_cleanup+0x77/0x1b0
[ 1012.896336]  [<ffffffff813dd898>] kobject_put+0x28/0x60
[ 1012.896336]  [<ffffffff814dfda7>] put_device+0x17/0x20
[ 1012.896336]  [<ffffffff8151f109>] __scsi_remove_device+0xa9/0xe0
[ 1012.896336]  [<ffffffff8151d6b4>] scsi_forget_host+0x64/0x70
[ 1012.896336]  [<ffffffff81511bb7>] scsi_remove_host+0x77/0x120
[ 1012.896336]  [<ffffffffa01e15a9>] sdebug_driver_remove+0x29/0x90 [scsi_debug]
[ 1012.896336]  [<ffffffff814e403f>] __device_release_driver+0x7f/0xf0
[ 1012.896336]  [<ffffffff814e40d3>] device_release_driver+0x23/0x30
[ 1012.896336]  [<ffffffff814e39d8>] bus_remove_device+0x108/0x180
[ 1012.896336]  [<ffffffff814e02d9>] device_del+0x129/0x1c0
[ 1012.896336]  [<ffffffff814e038e>] device_unregister+0x1e/0x60
[ 1012.896336]  [<ffffffffa01e0efc>] sdebug_remove_adapter+0x4c/0x70 [scsi_debug]
[ 1012.896336]  [<ffffffffa01e552d>] scsi_debug_exit+0x19/0xaec [scsi_debug]
[ 1012.896336]  [<ffffffff810ea51e>] SyS_delete_module+0x12e/0x1c0
[ 1012.896336]  [<ffffffff810536b9>] ? do_async_page_fault+0x29/0xe0
[ 1012.896336]  [<ffffffff81836b88>] ? async_page_fault+0x28/0x30
[ 1012.896336]  [<ffffffff81834ba9>] system_call_fastpath+0x16/0x1b
[ 1012.896336] Code: ff ff 48 8b 4d 80 e9 9f fc ff ff 0f 0b 0f 0b be ba 00 00 00 48 c7 c7 e8 cb ae 81 89 4d 80 e8 d5 15 01 00 8b 4d 80 e9 04 ff ff ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 
[ 1012.896336] RIP  [<ffffffff8105bbd3>] change_page_attr_set_clr+0x433/0x440
[ 1012.896336]  RSP <ffff88007966aec8>
[ 1012.896336] ---[ end trace 86a5a05a2d9e9cde ]---
[ 1012.896336] Kernel panic - not syncing: Fatal exception



Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.

Thanks,
Aaron

View attachment "reproduce" of type "text/plain" (1569 bytes)

View attachment ".dmesg" of type "text/plain" (39585 bytes)

Powered by blists - more mailing lists