OOPS/panic in iio_dummy (v3.6-rc6-176-gabef3bd)
Lars-Peter Clausen
lars at metafoo.de
Sat Sep 22 08:10:02 UTC 2012
On 09/22/2012 04:13 AM, Peter Hüwe wrote:
> Hi,
>
> loading iio_dummy results in kernel panic as the call to
> iio_buffer_register in iio_dummy_probe is performed with indio_dev->buffer ==
> NULL and thus the access to indio_dev->buffer->attrs results in this
> oops/panic.
>
> Thanks,
> Peter
>
Hi,
I sent a patch or this a couple of days ago. See
http://comments.gmane.org/gmane.linux.kernel.iio/5550
- Lars
> Steps to reproduce:
>
> #modprobe iio_dummy
> iio_dummy: module is from the staging directory, the quality is unknown, you
> have been warned.
>
> Modules linked in: iio_dummy(C+) industrialio
> Pid: 615, comm: modprobe Tainted: G C 3.6.0-rc6-00180-g68d0383-dirty
> RIP: 0033:[<00000000a089d846>]
> RSP: 000000009f4ffd30 EFLAGS: 00010206
> RAX: 0000000000000004 RBX: 00000000a08be6a0 RCX: 0000000000000000
> RDX: 000000006036a320 RSI: 0000000000000008 RDI: 0000000000000000
> RBP: 000000009f4ffda0 R08: 000000009f4ff900 R09: 0000000060406da8
> R10: 000000000000004a R11: 0000000000000246 R12: 00000000602a58bc
> R13: 0000000000000005 R14: 000000006005f170 R15: 000000009f6b0400
> Call Trace:
> 603675d8: [<6001d53d>] segv+0x1bd/0x340
> 603675f8: [<6008b8ab>] handle_irq_event_percpu+0xab/0x1b0
> 60367620: [<6008b9b0>] handle_irq_event+0x0/0x40
> 60367630: [<6002e09c>] os_waiting_for_events+0x0/0xc5
> 60367658: [<6008fccf>] rcu_irq_exit+0x5f/0xb0
> 603676a8: [<6001d713>] segv_handler+0x53/0xb0
> 603676c8: [<60019b5c>] sigio_handler+0xac/0xc0
> 603676f8: [<6002ff5a>] sig_handler_common+0xa4/0xb9
> 60367708: [<6005f170>] __mutex_init+0x0/0x20
> 60367718: [<602a58bc>] printk+0x0/0xa8
> 60367780: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 60367818: [<60016c34>] _einittext+0x2572/0x38f6
> 60367828: [<60016728>] _einittext+0x2066/0x38f6
> 60367908: [<60016c34>] _einittext+0x2572/0x38f6
> 603679a8: [<60019b70>] to_irq_stack+0x0/0xe0
> 60367a28: [<60019b70>] to_irq_stack+0x0/0xe0
> 60367a38: [<600300b5>] sig_handler+0x4a/0x5d
> 60367a58: [<6002fb81>] hard_handler+0x89/0xd8
> 60367a90: [<602a58bc>] printk+0x0/0xa8
> 60367aa0: [<6005f170>] __mutex_init+0x0/0x20
> 60367b08: [<602a58bc>] printk+0x0/0xa8
> 60367b18: [<6005f170>] __mutex_init+0x0/0x20
> 60367b68: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
>
> Kernel panic - not syncing: Kernel mode fault at addr 0x68, ip 0xa089d846
> Call Trace:
> 603674b0: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 603674c8: [<602a5751>] panic+0x146/0x2b1
> 60367500: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 60367508: [<602a560b>] panic+0x0/0x2b1
> 60367520: [<6007a4d4>] __module_text_address+0x14/0x70
> 60367538: [<6007ec20>] is_module_text_address+0x10/0x20
> 60367548: [<600582c7>] __kernel_text_address+0x87/0xc0
> 60367568: [<6001bc1f>] show_trace+0x7f/0xf0
> 60367598: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 603675c0: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 603675d8: [<6001d55b>] segv+0x1db/0x340
> 603675f8: [<6008b8ab>] handle_irq_event_percpu+0xab/0x1b0
> 60367620: [<6008b9b0>] handle_irq_event+0x0/0x40
> 60367630: [<6002e09c>] os_waiting_for_events+0x0/0xc5
> 60367658: [<6008fccf>] rcu_irq_exit+0x5f/0xb0
> 603676a8: [<6001d713>] segv_handler+0x53/0xb0
> 603676c8: [<60019b5c>] sigio_handler+0xac/0xc0
> 603676f8: [<6002ff5a>] sig_handler_common+0xa4/0xb9
> 60367708: [<6005f170>] __mutex_init+0x0/0x20
> 60367718: [<602a58bc>] printk+0x0/0xa8
> 60367780: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 60367818: [<60016c34>] _einittext+0x2572/0x38f6
> 60367828: [<60016728>] _einittext+0x2066/0x38f6
> 60367908: [<60016c34>] _einittext+0x2572/0x38f6
> 603679a8: [<60019b70>] to_irq_stack+0x0/0xe0
> 60367a28: [<60019b70>] to_irq_stack+0x0/0xe0
> 60367a38: [<600300b5>] sig_handler+0x4a/0x5d
> 60367a58: [<6002fb81>] hard_handler+0x89/0xd8
> 60367a90: [<602a58bc>] printk+0x0/0xa8
> 60367aa0: [<6005f170>] __mutex_init+0x0/0x20
> 60367b08: [<602a58bc>] printk+0x0/0xa8
> 60367b18: [<6005f170>] __mutex_init+0x0/0x20
> 60367b68: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
>
>
> Modules linked in: iio_dummy(C+) industrialio
> Pid: 615, comm: modprobe Tainted: G C 3.6.0-rc6-00180-g68d0383-dirty
> RIP: 0033:[<00000000402eff9a>]
> RSP: 0000007fbfbf6798 EFLAGS: 00000246
> RAX: ffffffffffffffda RBX: 0000000000000000 RCX: ffffffffffffffff
> RDX: 000000000060e110 RSI: 00000000000148c9 RDI: 0000000040024000
> RBP: 0000000000611b70 R08: 000000000060e100 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 000000000060e110
> R13: 0000000000000000 R14: 000000000060e010 R15: 0000000000611b88
> Call Trace:
> 60367448: [<6001db1e>] panic_exit+0x3e/0x60
> 60367478: [<600616ad>] notifier_call_chain+0x4d/0x70
> 603674a0: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 603674b8: [<60061708>] atomic_notifier_call_chain+0x18/0x20
> 603674c8: [<602a5784>] panic+0x179/0x2b1
> 60367500: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 60367508: [<602a560b>] panic+0x0/0x2b1
> 60367520: [<6007a4d4>] __module_text_address+0x14/0x70
> 60367538: [<6007ec20>] is_module_text_address+0x10/0x20
> 60367548: [<600582c7>] __kernel_text_address+0x87/0xc0
> 60367568: [<6001bc1f>] show_trace+0x7f/0xf0
> 60367598: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 603675c0: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 603675d8: [<6001d55b>] segv+0x1db/0x340
> 603675f8: [<6008b8ab>] handle_irq_event_percpu+0xab/0x1b0
> 60367620: [<6008b9b0>] handle_irq_event+0x0/0x40
> 60367630: [<6002e09c>] os_waiting_for_events+0x0/0xc5
> 60367658: [<6008fccf>] rcu_irq_exit+0x5f/0xb0
> 603676a8: [<6001d713>] segv_handler+0x53/0xb0
> 603676c8: [<60019b5c>] sigio_handler+0xac/0xc0
> 603676f8: [<6002ff5a>] sig_handler_common+0xa4/0xb9
> 60367708: [<6005f170>] __mutex_init+0x0/0x20
> 60367718: [<602a58bc>] printk+0x0/0xa8
> 60367780: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
> 60367818: [<60016c34>] _einittext+0x2572/0x38f6
> 60367828: [<60016728>] _einittext+0x2066/0x38f6
> 60367908: [<60016c34>] _einittext+0x2572/0x38f6
> 603679a8: [<60019b70>] to_irq_stack+0x0/0xe0
> 60367a28: [<60019b70>] to_irq_stack+0x0/0xe0
> 60367a38: [<600300b5>] sig_handler+0x4a/0x5d
> 60367a58: [<6002fb81>] hard_handler+0x89/0xd8
> 60367a90: [<602a58bc>] printk+0x0/0xa8
> 60367aa0: [<6005f170>] __mutex_init+0x0/0x20
> 60367b08: [<602a58bc>] printk+0x0/0xa8
> 60367b18: [<6005f170>] __mutex_init+0x0/0x20
> 60367b68: [<a089d846>] iio_buffer_register+0x46/0x610 [industrialio]
>
>
> Tested on recent linus' tree (v3.6-rc6-176-gabef3bd)
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