linux-kernel - [bio] kernel BUG at drivers/block/virtio

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Date:	Tue, 27 May 2014 02:55:07 +0800
From:	Jet Chen <jet.chen@...el.com>
To:	Maurizio Lombardi <mlombard@...hat.com>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org,
	Fengguang Wu <fengguang.wu@...el.com>
Subject: [bio] kernel BUG at drivers/block/virtio_blk.c:166!

Hi Maurizio,

FYI, we noticed the below changes on

commit 3979ef4dcf3d1de55a560a3a4016c30a835df44d ("bio-modify-__bio_add_page-to-accept-pages-that-dont-start-a-new-segment-v3")

+------------------------------------------+------------+------------+
|                                          | fceb38f36f | 3979ef4dcf |
+------------------------------------------+------------+------------+
| boot_successes                           | 25         | 10         |
| boot_failures                            | 0          | 6          |
| kernel_BUG_at_drivers/block/virtio_blk.c | 0          | 6          |
| invalid_opcode                           | 0          | 6          |
| RIP:virtio_queue_rq                      | 0          | 6          |
| Kernel_panic-not_syncing:Fatal_exception | 0          | 6          |
| backtrace:blk_mq_work_fn                 | 0          | 6          |
| kernel_BUG_at_arch/x86/mm/pageattr.c     | 0          | 3          |
| RIP:change_page_attr_set_clr             | 0          | 3          |
+------------------------------------------+------------+------------+


[  725.907416] EXT4-fs (vda): mounted filesystem with ordered data mode. Opts: acl,user_xattr
[  728.625269] EXT4-fs (vdd): mounted filesystem without journal. Opts: acl,user_xattr,noload
[  729.053064] ------------[ cut here ]------------
[  729.053181] kernel BUG at drivers/block/virtio_blk.c:166!
[  729.053181] invalid opcode: 0000 [#1] SMP [  729.053181] Modules linked in: ext4 mbcache jbd2 dm_mod fuse sg sr_mod cdrom ata_generic pata_acpi floppy parport_pc snd_pcm parport snd_timer cirrus syscopyarea sysfillrect snd sysimgblt ttm drm_kms_helper soundcore drm pcspkr ata_piix libata i2c_piix4
[  729.053181] CPU: 0 PID: 1645 Comm: kworker/0:1H Not tainted 3.15.0-rc5-next-20140521 #1
[  729.053181] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  729.053181] task: ffff880119add880 ti: ffff880103264000 task.ti: ffff880103264000
[  729.053181] RIP: 0010:[<ffffffff81425b27>]  [<ffffffff81425b27>] virtio_queue_rq+0x217/0x220
[  729.053181] RSP: 0018:ffff880103265d58  EFLAGS: 00010202
[  729.053181] RAX: 0000000000000081 RBX: ffff880116164900 RCX: dead000000200200
[  729.053181] RDX: 0000000000007530 RSI: ffff8800a16c4800 RDI: ffff8800a1693400
[  729.053181] RBP: ffff880103265d98 R08: ffff8800a16c4800 R09: ffff880103265dc8
[  729.053181] R10: dffd025bd0493448 R11: 0000000000001000 R12: ffff8800a16c4800
[  729.053181] R13: ffff880103265dc8 R14: 0000000110000001 R15: ffff8800a1693400
[  729.053181] FS:  0000000000000000(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
[  729.053181] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  729.053181] CR2: 000000000225a000 CR3: 000000008fc00000 CR4: 00000000000006f0
[  729.053181] Stack:
[  729.053181]  ffff880103265d80 ffffffff810a7295 ffff8800a16c4970 ffff8800a1559680
[  729.053181]  ffff8800a1693400 ffff880103265dc8 ffff8800a16c4800 ffff8800a14e1280
[  729.053181]  ffff880103265e00 ffffffff812e0335 ffff8800a1693408 ffff8800a1559680
[  729.053181] Call Trace:
[  729.053181]  [<ffffffff810a7295>] ? set_next_entity+0x95/0xb0
[  729.053181]  [<ffffffff812e0335>] __blk_mq_run_hw_queue+0x245/0x410
[  729.053181]  [<ffffffff812e0772>] blk_mq_run_work_fn+0x12/0x20
[  729.053181]  [<ffffffff810893b3>] process_one_work+0x183/0x490
[  729.053181]  [<ffffffff81089b7d>] worker_thread+0x11d/0x5c0
[  729.053181]  [<ffffffff81089a60>] ? rescuer_thread+0x3a0/0x3a0
[  729.053181]  [<ffffffff81090832>] kthread+0xd2/0xf0
[  729.053181]  [<ffffffff81090760>] ? kthread_create_on_node+0x180/0x180
[  729.053181]  [<ffffffff8175e47c>] ret_from_fork+0x7c/0xb0
[  729.053181]  [<ffffffff81090760>] ? kthread_create_on_node+0x180/0x180
[  729.053181] Code: 00 00 00 00 0f b7 86 f4 00 00 00 c7 86 78 01 00 00 02 00 00 00 48 c7 86 80 01 00 00 00 00 00 00 89 86 7c 01 00 00 e9 6f fe ff ff <0f> 0b 0f 1f 80 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 57 41 [  729.053181] RIP  [<ffffffff81425b27>] virtio_queue_rq+0x217/0x220
[  729.053181]  RSP <ffff880103265d58>
[  729.053181] ------------[ cut here ]------------


Full dmesg and reproduce script attached.

Thanks,
Jet


View attachment "reproduce" of type "text/plain" (389 bytes)

View attachment "dmesg" of type "text/plain" (66976 bytes)