linux-kernel - does anyone have seen this bug? reset

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Date:   Tue, 16 May 2017 14:40:51 +0800
From:   Xishi Qiu <qiuxishi@...wei.com>
To:     LKML <linux-kernel@...r.kernel.org>
Subject: does anyone have seen this bug?  reset_interrupt+0x82/0xa0 [floppy]

2017-05-12T04:46:36.373001+08:00[.[32m  OK  .[0m] Reached target System Initialization.
2017-05-12T04:46:36.385253+08:00[.[32m  OK  .[0m] Reached target Basic System.
2017-05-12T04:46:43.049936+08:00[   25.839157] BUG: unable to handle kernel [   25.841509] floppy0: no floppy controllers found
2017-05-12T04:46:43.597615+08:00NULL pointer dereference[   25.841740] work still pending
2017-05-12T04:46:44.376251+08:00 at 0000000000000010
2017-05-12T04:46:44.621685+08:00[   27.413928] IP: [<ffffffffa00048d2>] reset_interrupt+0x82/0xa0 [floppy]
2017-05-12T04:46:45.324827+08:00[   28.117060] PGD 0 
2017-05-12T04:46:45.615632+08:00[   28.407879] Oops: 0000 [#1] SMP 
2017-05-12T04:46:45.710419+08:00[   28.501984] Modules linked in: virtio(+) crc32c_intel(+) floppy(+)
2017-05-12T04:46:45.899891+08:00[   28.692147] CPU: 13 PID: 159 Comm: kworker/u32:1 Not tainted 3.10.0-327.28.56.6.x86_64 #1
2017-05-12T04:46:46.187787+08:00[   28.980030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-20170509_142013-build9a64a246a222 04/01/2014
2017-05-12T04:46:46.597071+08:00[   29.385246] Workqueue: floppy reset_interrupt [floppy]
2017-05-12T04:46:46.785518+08:00[   29.577762] task: ffff880425fe6780 ti: ffff880425840000 task.ti: ffff880425840000
2017-05-12T04:46:47.059479+08:00[   29.851728] RIP: 0010:[<ffffffffa00048d2>]  [<ffffffffa00048d2>] reset_interrupt+0x82/0xa0 [floppy]
2017-05-12T04:46:47.473387+08:00[   30.231355] RSP: 0018:ffff880425843e18  EFLAGS: 00010202
2017-05-12T04:46:47.695370+08:00[   30.487624] RAX: 0000000000000000 RBX: ffffffffa000b180 RCX: dead000000200200
2017-05-12T04:46:47.886238+08:00[   30.678467] RDX: 0000000000000000 RSI: 0000000000c200c0 RDI: ffffffffa0009828
2017-05-12T04:46:48.054132+08:00[   30.846395] RBP: ffff880425843e18 R08: ffffffffa000b188 R09: 00017ffcda00b180
2017-05-12T04:46:48.216490+08:00[   31.008753] R10: 00017ffcda00b180 R11: 00000000000003ff R12: ffff880428845880
2017-05-12T04:46:48.417821+08:00[   31.210077] R13: ffff880429178c00 R14: ffff880425236a00 R15: 0000000000000400
2017-05-12T04:46:48.565850+08:00[   31.358107] FS:  0000000000000000(0000) GS:ffff88042f540000(0000) knlGS:0000000000000000
2017-05-12T04:46:48.969712+08:00[   31.761961] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2017-05-12T04:46:49.527370+08:00[   32.319621] CR2: 0000000000000010 CR3: 000000042569b000 CR4: 00000000001407e0
2017-05-12T04:46:49.996451+08:00[   32.788704] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
2017-05-12T04:46:50.008769+08:00[   32.801019] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
2017-05-12T04:46:50.025615+08:00[   32.817840] Stack:
2017-05-12T04:46:50.033198+08:00[   32.825441]  ffff880425843e60 ffffffff8109d8ab 0000000129178c18 0000000000000000
2017-05-12T04:46:50.058276+08:00[   32.850530]  ffff880429178c18 ffff8804288458b0 ffff880425fe6780 ffff880428845880
2017-05-12T04:46:50.088493+08:00[   32.880752]  ffff880429178c00 ffff880425843ec0 ffffffff8109e67b ffff880425843fd8
2017-05-12T04:46:50.116903+08:00[   32.909158] Call Trace:
2017-05-12T04:46:50.126325+08:00[   32.918578]  [<ffffffff8109d8ab>] process_one_work+0x17b/0x470
2017-05-12T04:46:50.135293+08:00[   32.927550]  [<ffffffff8109e67b>] worker_thread+0x11b/0x400
2017-05-12T04:46:50.144728+08:00[   32.936983]  [<ffffffff8109e560>] ? rescuer_thread+0x400/0x400
2017-05-12T04:46:50.174593+08:00[   32.966841]  [<ffffffff810a5dbf>] kthread+0xcf/0xe0
2017-05-12T04:46:50.189138+08:00[   32.981394]  [<ffffffff810b4ca6>] ? finish_task_switch+0x56/0x180
2017-05-12T04:46:50.197718+08:00[   32.989977]  [<ffffffff810a5cf0>] ? kthread_create_on_node+0x140/0x140
2017-05-12T04:46:50.208049+08:00[   33.000291]  [<ffffffff81652418>] ret_from_fork+0x58/0x90
2017-05-12T04:46:50.216998+08:00[   33.009262]  [<ffffffff810a5cf0>] ? kthread_create_on_node+0x140/0x140
2017-05-12T04:46:50.227458+08:00[   33.019717] Code: c7 c2 0d 88 00 a0 48 c7 c6 10 81 00 a0 48 c7 c7 2b 89 00 a0 31 c0 e8 cc 72 63 e1 eb a9 48 8b 05 ad 8d 00 00 48 c7 c7 28 98 00 a0 <48> 8b 70 10 31 c0 e8 b1 72 63 e1 48 8b 05 94 8d 00 00 ff 50 10 
2017-05-12T04:46:51.568674+08:00[   34.360929] RIP  [<ffffffffa00048d2>] reset_interrupt+0x82/0xa0 [floppy]
2017-05-12T04:46:52.196079+08:00[   34.988324]  RSP <ffff880425843e18>
2017-05-12T04:46:52.212738+08:00[   35.004995] CR2: 0000000000000010
2017-05-12T04:46:52.229520+08:00[   35.021777] ---[ end trace 9881c03b6b437287 ]---
2017-05-12T04:46:52.253266+08:00[   35.045520] Kernel panic - not syncing: Fatal exception