linux-kernel - [drm] 48c7878998: BUG: unable to handle kernel paging request at fffffffffffffff0

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Date:   Wed, 05 Oct 2016 06:26:16 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:     lkp@...org, Stephen Rothwell <sfr@...b.auug.org.au>,
        LKML <linux-kernel@...r.kernel.org>,
        Emil Velikov <emil.velikov@...labora.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>
Subject: [drm]  48c7878998: BUG: unable to handle kernel paging request at fffffffffffffff0


FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 48c787899882ec9c3e111a81801c82d10da17810 ("drm: Add API for capturing frame CRCs")

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -m 320M

caused below changes:


+-------------------------------------------------+------------+------------+
|                                                 | 21165bd933 | 48c7878998 |
+-------------------------------------------------+------------+------------+
| boot_successes                                  | 7          | 0          |
| boot_failures                                   | 1          | 8          |
| BUG:kernel_reboot-without-warning_in_test_stage | 1          |            |
| BUG:unable_to_handle_kernel                     | 0          | 7          |
| Oops:#[##]                                      | 0          | 7          |
| RIP:drm_debugfs_crtc_add                        | 0          | 7          |
| calltrace:vgem_init                             | 0          | 7          |
| Kernel_panic-not_syncing:Fatal_exception        | 0          | 7          |
| RIP:__sanitizer_cov_trace_pc                    | 0          | 1          |
| calltrace:rbtree_test_init                      | 0          | 1          |
| Kernel_panic-not_syncing:softlockup:hung_tasks  | 0          | 1          |
+-------------------------------------------------+------------+------------+



[    6.691191] SyncLink PC Card driver $Revision: 4.34 $, tty major#241
[    6.692745] [drm] Initialized
[    6.693142] [drm] radeon kernel modesetting enabled.
[    6.694173] BUG: unable to handle kernel paging request at fffffffffffffff0
[    6.694996] IP: [<ffffffff89aa68e1>] drm_debugfs_crtc_add+0x11/0xb0
[    6.695711] PGD 10c0d067 PUD 10c0f067 PMD 0 
[    6.696242] Oops: 0000 [#1]
[    6.696563] CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.0-rc8-01313-g48c7878 #1
[    6.697042] task: ffff89a7c0062000 task.stack: ffff89a7c0064000
[    6.697042] RIP: 0010:[<ffffffff89aa68e1>]  [<ffffffff89aa68e1>] drm_debugfs_crtc_add+0x11/0xb0
[    6.697042] RSP: 0000:ffff89a7c0067de0  EFLAGS: 00010297
[    6.697042] RAX: ffff89a7c0062000 RBX: fffffffffffffff0 RCX: 0000000000000006
[    6.697042] RDX: 0000000000000000 RSI: ffff89a7c00625b0 RDI: fffffffffffffff0
[    6.697042] RBP: ffff89a7c0067df8 R08: 0000000000000000 R09: 0000000000000000
[    6.697042] R10: 0000000000000000 R11: 0000000000000000 R12: ffff89a7cd1af858
[    6.697042] R13: ffff89a7cd1aef18 R14: ffff89a7cd1af008 R15: ffffffff8a89b088
[    6.697042] FS:  0000000000000000(0000) GS:ffffffff8aa24000(0000) knlGS:0000000000000000
[    6.697042] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    6.697042] CR2: fffffffffffffff0 CR3: 0000000010c0c000 CR4: 00000000000006b0
[    6.697042] Stack:
[    6.697042]  fffffffffffffff0 ffff89a7cd1af858 ffff89a7cd1aef18 ffff89a7c0067e38
[    6.697042]  ffffffff89a82fda ffffffff8aaa7500 ffff89a7cd1af008 0000000000000000
[    6.697042]  0000000000000000 ffffffff8ab8c92f ffff89a7c0068000 ffff89a7c0067e70
[    6.697042] Call Trace:
[    6.697042]  [<ffffffff89a82fda>] drm_minor_register+0xea/0x260
[    6.697042]  [<ffffffff8ab8c92f>] ? set_debug_rodata+0x1f/0x1f
[    6.697042]  [<ffffffff89a83a9a>] drm_dev_register+0xaa/0x110
[    6.697042]  [<ffffffff8ab8c92f>] ? set_debug_rodata+0x1f/0x1f
[    6.697042]  [<ffffffff8abcda7e>] vgem_init+0x40/0x61
[    6.697042]  [<ffffffff8abcda3e>] ? vmwgfx_init+0x55/0x55
[    6.697042]  [<ffffffff8ab8d2b9>] do_one_initcall+0xa0/0x159
[    6.697042]  [<ffffffff8ab8c92f>] ? set_debug_rodata+0x1f/0x1f
[    6.697042]  [<ffffffff8ab8d4a4>] kernel_init_freeable+0x132/0x1dd
[    6.697042]  [<ffffffff8a28ff93>] kernel_init+0x13/0x160
[    6.697042]  [<ffffffff892e862a>] ? schedule_tail+0xa/0x50
[    6.697042]  [<ffffffff8a29e96f>] ret_from_fork+0x1f/0x40
[    6.697042]  [<ffffffff8a28ff80>] ? rest_init+0x170/0x170
[    6.697042] Code: bb ff 48 c7 83 70 03 00 00 00 00 00 00 e8 a8 8e 89 ff 5b 41 5c 5d c3 0f 1f 00 55 48 89 e5 41 55 41 54 53 48 89 fb e8 8f 8e 89 ff <48> 8b 03 8b 93 f8 00 00 00 48 c7 c6 84 18 84 8a bf c0 00 40 02 
[    6.697042] RIP  [<ffffffff89aa68e1>] drm_debugfs_crtc_add+0x11/0xb0
[    6.697042]  RSP <ffff89a7c0067de0>
[    6.697042] CR2: fffffffffffffff0
[    6.697042] ---[ end trace e0ac2de26c2f13a0 ]---
[    6.697042] Kernel panic - not syncing: Fatal exception





Thanks,
Kernel Test Robot

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