linux-kernel - [LKP] [drm/atomic] 79ef5c1b82: general_protection

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Date:   Tue, 18 Sep 2018 13:52:28 +0800
From:   kernel test robot <rong.a.chen@...el.com>
To:     Lyude Paul <lyude@...hat.com>
Cc:     dri-devel@...ts.freedesktop.org, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Sean Paul <sean@...rly.run>, lkp@...org
Subject: [LKP] [drm/atomic] 79ef5c1b82: general_protection_fault:#[##]

FYI, we noticed the following commit (built with gcc-6):

commit: 79ef5c1b820e59bcc240e133cd9df59b2b20415f ("[PATCH] drm/atomic: Use drm_drv_uses_atomic_modeset() for debugfs creation")
url: https://github.com/0day-ci/linux/commits/Lyude-Paul/drm-atomic-Use-drm_drv_uses_atomic_modeset-for-debugfs-creation/20180918-020244


in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3 -smp 4 -m 8G

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+--------------------------------------------------------------------------------------+------------+------------+
|                                                                                      | ad3273d5f1 | 79ef5c1b82 |
+--------------------------------------------------------------------------------------+------------+------------+
| boot_successes                                                                       | 6          | 0          |
| boot_failures                                                                        | 2          | 6          |
| BUG:kernel_hang_in_early-boot_stage,last_printk:Probing_EDD(edd=off_to_disable)...ok | 2          | 2          |
| general_protection_fault:#[##]                                                       | 0          | 4          |
| RIP:drm_debugfs_init                                                                 | 0          | 4          |
| Kernel_panic-not_syncing:Fatal_exception                                             | 0          | 4          |
+--------------------------------------------------------------------------------------+------------+------------+



[  185.861767] [drm] Driver supports precise vblank timestamp query.
[  185.866054] [drm] Initialized vkms 1.0.0 20180514 for virtual device on minor 0
[  185.870315] usbcore: registered new interface driver udl
[  185.872276] kasan: CONFIG_KASAN_INLINE enabled
[  185.873048] kasan: GPF could be caused by NULL-ptr deref or user memory access
[  185.874526] general protection fault: 0000 [#1] SMP KASAN PTI
[  185.875263] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.19.0-rc4-00023-g79ef5c1 #1
[  185.875263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[  185.875263] RIP: 0010:drm_debugfs_init+0x2fd/0x510
[  185.875263] Code: 48 c1 e9 03 80 3c 11 00 0f 85 10 02 00 00 49 8b 96 00 0b 00 00 48 b9 00 00 00 00 00 fc ff df 48 8d 7a 28 48 89 fe 48 c1 ee 03 <80> 3c 0e 00 0f 85 a8 01 00 00 48 83 7a 28 00 0f 85 ab fe ff ff e9
[  185.882598] RSP: 0000:ffff880107f9fa90 EFLAGS: 00010206
[  185.882598] RAX: 0000000000000000 RBX: ffff8801071da000 RCX: dffffc0000000000
[  185.882598] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000028
[  185.882598] RBP: 1ffff10020ff3f54 R08: ffffed0020e3b407 R09: ffffed0020e3b406
[  185.882598] R10: ffff8801071da037 R11: ffffed0020e3b407 R12: ffffffff86852de0
[  185.882598] R13: 0000000000000000 R14: ffff8801d521d500 R15: 0000000000003000
[  185.882598] FS:  0000000000000000(0000) GS:ffff8801e9e00000(0000) knlGS:0000000000000000
[  185.882598] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  185.882598] CR2: 00000000ffffffff CR3: 0000000005624000 CR4: 00000000000006e0
[  185.882598] Call Trace:
[  185.882598]  ? __kmalloc_track_caller+0x14f/0x2e0
[  185.882598]  ? drm_debugfs_create_files+0x420/0x420
[  185.882598]  ? memcpy+0x34/0x50
[  185.882598]  ? kstrdup+0x5a/0x70
[  185.882598]  ? lock_acquired+0x3f1/0xbf0
[  185.898672]  drm_minor_register+0xa4/0x220
[  185.898672]  drm_dev_register+0x10f/0x610
[  185.898672]  drm_get_pci_dev+0x195/0x4d0
[  185.898672]  bochs_pci_probe+0x1e6/0x2f0
[  185.898672]  pci_device_probe+0x2a7/0x4b0
[  185.898672]  ? pci_device_remove+0x2c0/0x2c0
[  185.902591]  really_probe+0x4db/0x780
[  185.902591]  driver_probe_device+0xe7/0x240
[  185.902591]  __driver_attach+0x262/0x2d0
[  185.902591]  ? driver_probe_device+0x240/0x240
[  185.902591]  bus_for_each_dev+0x138/0x1d0
[  185.902591]  ? bus_remove_file+0xe0/0xe0
[  185.902591]  bus_add_driver+0x2c5/0x5e0
[  185.902591]  ? qxl_init+0x7b/0x7b
[  185.902591]  driver_register+0x1b7/0x420
[  185.902591]  bochs_init+0x33/0x3e
[  185.902591]  do_one_initcall+0x11b/0x389
[  185.902591]  ? start_kernel+0x769/0x769
[  185.902591]  ? lock_downgrade+0x660/0x660
[  185.902591]  ? do_early_param+0x124/0x124
[  185.902591]  kernel_init_freeable+0x4c1/0x579
[  185.902591]  ? rest_init+0x130/0x130
[  185.918576]  kernel_init+0x14/0x190
[  185.918576]  ? _raw_spin_unlock_irq+0x29/0x70
[  185.918576]  ? rest_init+0x130/0x130
[  185.918576]  ret_from_fork+0x24/0x30
[  185.932602] ---[ end trace 14d3235039b65adf ]---
[  185.934465] RIP: 0010:drm_debugfs_init+0x2fd/0x510
[  185.936354] Code: 48 c1 e9 03 80 3c 11 00 0f 85 10 02 00 00 49 8b 96 00 0b 00 00 48 b9 00 00 00 00 00 fc ff df 48 8d 7a 28 48 89 fe 48 c1 ee 03 <80> 3c 0e 00 0f 85 a8 01 00 00 48 83 7a 28 00 0f 85 ab fe ff ff e9
[  185.949797] RSP: 0000:ffff880107f9fa90 EFLAGS: 00010206
[  185.950782] RAX: 0000000000000000 RBX: ffff8801071da000 RCX: dffffc0000000000
[  185.952070] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000028
[  185.953367] RBP: 1ffff10020ff3f54 R08: ffffed0020e3b407 R09: ffffed0020e3b406
[  185.954667] R10: ffff8801071da037 R11: ffffed0020e3b407 R12: ffffffff86852de0
[  185.955950] R13: 0000000000000000 R14: ffff8801d521d500 R15: 0000000000003000
[  185.957247] FS:  0000000000000000(0000) GS:ffff8801e9e00000(0000) knlGS:0000000000000000
[  185.958712] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  185.959753] CR2: 00000000ffffffff CR3: 0000000005624000 CR4: 00000000000006e0
[  185.961037] Kernel panic - not syncing: Fatal exception
[  185.962695] Kernel Offset: disabled

Elapsed time: 190

#!/bin/bash


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
lkp

View attachment "config-4.19.0-rc4-00023-g79ef5c1" of type "text/plain" (116272 bytes)

View attachment "job-script" of type "text/plain" (4351 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (11496 bytes)