linux-kernel - fmc: BUG: scheduling while atomic: swapper/0/1/0x00000002

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Date:	Mon, 14 Oct 2013 14:34:06 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Alessandro Rubini <rubini@...dd.com>
Cc:	lkml <linux-kernel@...r.kernel.org>
Subject: fmc: BUG: scheduling while atomic: swapper/0/1/0x00000002

Hi,

I'm getting the following with randconfig testing in kvm, config is .attached.

...
[    3.022023] fmc fake-design-for-testing-f001: Driver has no ID: matches all
[    3.024393] bus: 'fmc': driver_probe_device: matched device fake-design-for-testing-f001 with driver fmc_chardev
[    3.027890] bus: 'fmc': really_probe: probing driver fmc_chardev with device fake-design-for-testing-f001
[    3.031236] device: 'fake-design-for-testing-f001': device_add
[    3.033296] BUG: scheduling while atomic: swapper/0/1/0x00000002
[    3.035372] 4 locks held by swapper/0/1:
[    3.036808]  #0: [    3.036808]  #0:  ( (&__lockdep_no_validate__){......}), at: [<ffffffff81344b5b>] __driver_attach+0x4b/0xa0
[    3.040537]  #1: [    3.040537]  #1:  ( (&__lockdep_no_validate__){......}), at: [<ffffffff81344b69>] __driver_attach+0x59/0xa0
[    3.044294]  #2: [    3.044294]  #2:  ( (fc_lockfc_lock){+.+...}), at: [<ffffffff815d2466>] fc_probe+0x96/0x150
[    3.047447]  #3: [    3.047447]  #3:  ( (misc_mtxmisc_mtx){+.+.+.}), at: [<ffffffff81312619>] misc_register+0x29/0x130
[    3.050754] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.11.0-00039-g3102d23a949a #1
[    3.053491]  ffff88007edd2bc0 ffff88007c3f19b0 ffffffff817721df ffff88007c3e8000
[    3.056521]  ffff88007c3f19c8 ffffffff8176df69 7fffffffffffffff ffff88007c3f1a30
[    3.059551]  ffffffff817803d4 00000000001d2bc0 ffff88007c3f1fd8 ffff88007c3f1fd8
[    3.062573] Call Trace:
[    3.063576]  [<ffffffff817721df>] dump_stack+0x54/0x74
[    3.065383]  [<ffffffff8176df69>] __schedule_bug+0x61/0x70
[    3.067304]  [<ffffffff817803d4>] __schedule+0x704/0x7a0
[    3.069178]  [<ffffffff81780499>] schedule+0x29/0x70
[    3.070935]  [<ffffffff8177d5c9>] schedule_timeout+0x209/0x2c0
[    3.072967]  [<ffffffff810c3e03>] ? mark_held_locks+0x63/0x110
[    3.074988]  [<ffffffff817829bc>] ? _raw_spin_unlock_irq+0x2c/0x50
[    3.077113]  [<ffffffff810c3fcd>] ? trace_hardirqs_on_caller+0x11d/0x140
[    3.079407]  [<ffffffff81780b2c>] wait_for_completion+0xac/0x110
[    3.081483]  [<ffffffff810a58b0>] ? wake_up_state+0x20/0x20
[    3.083439]  [<ffffffff81349255>] devtmpfs_create_node+0x115/0x150
[    3.085544]  [<ffffffff81780ab6>] ? wait_for_completion+0x36/0x110
[    3.087676]  [<ffffffff81340abf>] device_add+0x26f/0x680
[    3.089525]  [<ffffffff81340fb0>] device_create_groups_vargs+0xe0/0x110
[    3.091793]  [<ffffffff81341ab1>] device_create+0x41/0x50
[    3.093673]  [<ffffffff813126bf>] misc_register+0xcf/0x130
[    3.095589]  [<ffffffff815d246f>] fc_probe+0x9f/0x150
[    3.097360]  [<ffffffff815cffd7>] fmc_probe+0x17/0x20
[    3.099142]  [<ffffffff81344846>] driver_probe_device.part.10+0xa6/0x2f0
[    3.101412]  [<ffffffff81344ba9>] __driver_attach+0x99/0xa0
[    3.103371]  [<ffffffff81344b10>] ? __device_attach+0x60/0x60
[    3.105355]  [<ffffffff81342a7b>] bus_for_each_dev+0x6b/0xb0
[    3.107314]  [<ffffffff8134471e>] driver_attach+0x1e/0x20
[    3.109213]  [<ffffffff8134349c>] bus_add_driver+0xfc/0x270
[    3.111144]  [<ffffffff815d2390>] ? fc_read+0xa0/0xa0
[    3.112922]  [<ffffffff81345196>] driver_register+0x66/0x140
[    3.114888]  [<ffffffff815d2390>] ? fc_read+0xa0/0xa0
[    3.116662]  [<ffffffff815d01a5>] fmc_driver_register+0x35/0x40
[    3.118704]  [<ffffffff815d23a5>] fc_init+0x15/0x20
[    3.120438]  [<ffffffff821a4e15>] do_one_initcall+0x7f/0xf1
[    3.122373]  [<ffffffff81094638>] ? parse_args+0x1f8/0x330
[    3.124293]  [<ffffffff821a4f99>] kernel_init_freeable+0x112/0x192
[    3.126413]  [<ffffffff821a484b>] ? do_early_param+0x88/0x88
[    3.128418]  [<ffffffff81764b20>] ? rest_init+0xe0/0xe0
[    3.130240]  [<ffffffff81764b2e>] kernel_init+0xe/0x190
[    3.132071]  [<ffffffff817841ac>] ret_from_fork+0x7c/0xb0
[    3.133946]  [<ffffffff81764b20>] ? rest_init+0xe0/0xe0
[    3.136574] fmc_chardev fake-design-for-testing-f001: Created misc device "fake-design-for-testing-f001"
[    3.139902] driver: 'fake-design-for-testing-f001': driver_bound: bound to device 'fmc_chardev'
[    3.142948] bus: 'fmc': really_probe: bound device fake-design-for-testing-f001 to driver fmc_chardev

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--

View attachment "config" of type "text/plain" (80360 bytes)