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Date: Mon, 28 Jan 2008 22:12:17 +0100
From: Rene Herman <rene.herman@...access.nl>
To: trenn@...e.de
CC: Pekka Enberg <penberg@...helsinki.fi>, linux-acpi@...r.kernel.org,
Len Brown <lenb@...nel.org>,
Bjorn Helgaas <bjorn.helgaas@...com>,
linux-kernel <linux-kernel@...r.kernel.org>,
Jean Delvare <khali@...ux-fr.org>,
Jaroslav Kysela <perex@...ex.cz>
Subject: Re: [PATCH] Allocate pnp resources dynamically via krealloc - working
version - Addon patch 3
On 28-01-08 20:12, Thomas Renninger wrote:
> This was more a step backward, hopefully this one (on top), gets the
> area bugfree?
I'm afraid not. Next oops in pnp_check_port(). The attached lets it get past
that point but _then_ things fall apart a little bit further on again which
seems to mean it's something a bit more fundamental. Should pnp_check_* even
be called without any initialised resources?
Without the attached:
===
pnp: the driver 'cs4236_isapnp' has been registered
cs4236_isapnp 01:01.00: driver attached
cs4236_isapnp 01:01.02: driver attached
cs4236_isapnp 01:01.03: driver attached
BUG: unable to handle kernel NULL pointer dereference at virtual address
0000000c
printing eip: c10e4365 *pde = 00000000
Oops: 0000 [#1] PREEMPT
Modules linked in: snd_cs4236 snd_opl3_lib snd_hwdep snd_cs4236_lib
snd_mpu401_uart snd_rawmidi snd_seq_device snd_cs4231_lib snd_pcm snd_timer
snd soundcore s
nd_page_alloc nfsd lockd nfs_acl sunrpc exportfs
Pid: 1350, comm: modprobe Not tainted (2.6.24-local #6)
EIP: 0060:[<c10e4365>] EFLAGS: 00010246 CPU: 0
EIP is at pnp_check_port+0x15/0x125
EAX: ef8f5800 EBX: 00000000 ECX: 00000000 EDX: 00000000
ESI: ef8f5800 EDI: 00000000 EBP: ef8f5800 ESP: e447edec
DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process modprobe (pid: 1350, ti=e447e000 task=ed35f4c0 task.ti=e447e000)
Stack: 00000000 e447d900 c108ab97 ef8fe100 ef8f5800 00000000 ef82ae40 c10e5295
00000534 00000537 00000000 40000101 efa4e360 c108b88b e4462180 ef8fe100
00000000 ef8f5800 c10e5426 00000001 ef8f5964 00000000 00000000 00000000
Call Trace:
[<c108ab97>] sysfs_find_dirent+0x13/0x23
[<c10e5295>] pnp_assign_port+0xe5/0x104
[<c108b88b>] sysfs_create_link+0xd0/0x111
[<c10e5426>] pnp_assign_resources+0x172/0x23a
[<c10e5555>] pnp_auto_config_dev+0x67/0xa6
[<c10e373a>] pnp_request_card_device+0x9b/0xbe
[<c10e55a7>] pnp_activate_dev+0x13/0x3c
[<f0a4b559>] snd_cs423x_pnpc_detect+0xe4/0x35f [snd_cs4236]
[<c10e330d>] pnp_alloc+0xe/0x25
[<c10e3652>] card_probe+0xba/0x107
[<c10e3b75>] pnp_register_card_driver+0xa3/0xb3
[<f08de02f>] alsa_card_cs423x_init+0x2f/0x4f [snd_cs4236]
[<c103258a>] sys_init_module+0x1379/0x149b
[<c104773a>] unmap_region+0xe5/0x100
[<c1003d62>] syscall_call+0x7/0xb
=======================
Code: ac 29 c1 75 a7 b8 01 00 00 00 eb 02 31 c0 83 c4 0c 5b 5e 5f 5d c3 55
89 c5 57 56 53 6b da 1c 83 ec 0c 89 14 24 03 98 64 01 00 00 <f7> 43 0c 00 00
00 30 0
f 85 f2 00 00 00 83 b8 54 01 00 00 00 75
EIP: [<c10e4365>] pnp_check_port+0x15/0x125 SS:ESP 0068:e447edec
---[ end trace 149e6ce75dd3870f ]---
===
With the attached:
===
pnp: the driver 'cs4236_isapnp' has been registered
cs4236_isapnp 01:01.00: driver attached
cs4236_isapnp 01:01.02: driver attached
cs4236_isapnp 01:01.03: driver attached
pnp: Port allocate: ed366400 - ed369500; Allocated: 448 bytes, size
ofstruct: 28 - allocated ports: 8
pnp: Dma allocate: ed276a80 - ed2776c0; Allocated: 112 bytes, size ofstruct:
28 - allocated dmas: 2
cs4236_isapnp 01:01.00: activated
BUG: unable to handle kernel NULL pointer dereference at virtual address
00000000
printing eip: f0a4b5a8 *pde = 00000000
Oops: 0000 [#1] PREEMPT
Modules linked in: snd_cs4236 snd_opl3_lib snd_hwdep snd_cs4236_lib
snd_mpu401_uart snd_rawmidi snd_seq_device snd_cs4231_lib snd_pcm snd_timer
snd soundcore snd_page_alloc nfsd lockd nfs_acl sunrpc exportfs
Pid: 1348, comm: modprobe Not tainted (2.6.24-local #9)
EIP: 0060:[<f0a4b5a8>] EFLAGS: 00010202 CPU: 0
EIP is at snd_cs423x_pnpc_detect+0x133/0x35f [snd_cs4236]
EAX: 00000000 EBX: ef8f5800 ECX: 00000220 EDX: 00000001
ESI: 00000000 EDI: 00000534 EBP: ed338200 ESP: ed3cfe90
DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process modprobe (pid: 1348, ti=ed3cf000 task=ed2c79f0 task.ti=ed3cf000)
Stack: 00000286 00000001 f0a4d780 c10e330d c12b7c6c ef8f5e00 ed26fe80 ed3383bc
ef8f5e00 ed26fe80 f0a4e0a4 00000003 c10e3652 f0a4d740 ef8f5600 f0a4d740
efa4f514 f0a8aa4c 00000000 c10e3b75 00000001 f0a4e440 f08de02f ed338fc4
Call Trace:
[<c10e330d>] pnp_alloc+0xe/0x25
[<c10e3652>] card_probe+0xba/0x107
[<c10e3b75>] pnp_register_card_driver+0xa3/0xb3
[<f08de02f>] alsa_card_cs423x_init+0x2f/0x4f [snd_cs4236]
[<c103258a>] sys_init_module+0x1379/0x149b
[<c104773a>] unmap_region+0xe5/0x100
[<c1003d62>] syscall_call+0x7/0xb
=======================
Code: d6 a4 f0 7e 10 8b 83 64 01 00 00 8b 40 1c 89 04 b5 60 d6 a4 f0 8b 83
64 01 00 00 8b 48 38 89 0c b5 40 d6 a4 f0 8b 83 7c 01 00 00 <8b> 00 89 04 b5
20 d6 a4 f0 8b 83 74 01 00 00 8b 00 89 04 b5 e0
EIP: [<f0a4b5a8>] snd_cs423x_pnpc_detect+0x133/0x35f [snd_cs4236] SS:ESP
0068:ed3cfe90
---[ end trace 9f2b1188efb740f7 ]---
===
For reference:
# cat /sys/bus/pnp/devices/01\:01.00/options
Dependent: 01 - Priority preferred
port 0x534-0x534, align 0x3, size 0x4, 16-bit address decoding
port 0x388-0x388, align 0x7, size 0x4, 16-bit address decoding
port 0x220-0x220, align 0x1f, size 0x10, 16-bit address decoding
irq 5 High-Edge
dma 1 8-bit master byte-count type-F
dma 0 8-bit master byte-count type-F
Rene.
View attachment "foo.diff" of type "text/plain" (2618 bytes)
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