This repository has been archived on 2026-03-14. You can view files and clone it, but cannot push or open issues or pull requests.
Files
ubports_kernel_google_msm/include/linux
Kenji Kaneshige 0747aaf42d PCI/ACPI: fix wrong assumption in acpi_pci_get_bridge_handle
Current acpi_pci_get_bridge_handle() has an assumption that
pci_bus->self is NULL on the root pci bus. But it might not true on
some platforms. Because of this wrong assumption, current
acpi_pci_get_bridge_handle() might return improper ACPI handle. We
must check pci_bus->parent instead.

This bug is the root cause of the following kernel panic reported by
James Bottomley. This problem was introduced by the commit
e8c331e963. The immediate cause was
acpi_pci_get_bridge_handle() returned NULL unexpectedly and it was
passed as the second argument of acpi_walk_namespace().

pci_hotplug: PCI Hot Plug PCI Core version: 0.5
acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
IP: [<ffffffff8039646f>] acpi_ns_get_next_node+0xb/0x3c
PGD 0
Oops: 0000 [#1] SMP
last sysfs file:
CPU 0
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.28 #1
RIP: 0010:[<ffffffff8039646f>]  [<ffffffff8039646f>] acpi_ns_get_next_node+0xb/0x3c
RSP: 0018:ffff88007f87fd30  EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8037d260 R09: ffff88007f87fdfc
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffffffff80742040(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000010 CR3: 0000000000201000 CR4: 00000000000006a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 1, threadinfo ffff88007f87e000, task ffff88007f875040)
Stack:
 0000000000000000 ffffffff803964f5 ffff88007f81b728 0000000000001001
 ffff88007f87fdfc ffffffff8037d260 0000000600000001 0000000000000000
 ffffffff8037d260 0000000000000000 0000000000000001 ffff88007f87fdfc
Call Trace:
 [<ffffffff803964f5>] acpi_ns_walk_namespace+0x55/0x138
 [<ffffffff8037d260>] is_pci_dock_device+0x0/0x20
 [<ffffffff8037d260>] is_pci_dock_device+0x0/0x20
 [<ffffffff80394a9e>] acpi_walk_namespace+0x5f/0x83
 [<ffffffff8037dd33>] detect_ejectable_slots+0x53/0x70
 [<ffffffff8037de38>] add_bridge+0xe8/0x200
 [<ffffffff80394aaa>] acpi_walk_namespace+0x6b/0x83
 [<ffffffff803a4ad1>] acpi_pci_register_driver+0x48/0x61
 [<ffffffff806fc5df>] acpiphp_init+0x0/0x58
 [<ffffffff806fc732>] acpiphp_glue_init+0x4c/0x5a
 [<ffffffff806fc616>] acpiphp_init+0x37/0x58
 [<ffffffff8020903b>] _stext+0x3b/0x180
 [<ffffffff80312598>] create_proc_entry+0x58/0xa0
 [<ffffffff802815d1>] register_irq_proc+0xc1/0xe0
 [<ffffffff806db64b>] kernel_init+0x152/0x1ac
 [<ffffffff8023d970>] finish_task_switch+0x0/0x110
 [<ffffffff8020ca7a>] child_rip+0xa/0x20
 [<ffffffff8020c47c>] restore_args+0x0/0x30
 [<ffffffff806db4f9>] kernel_init+0x0/0x1ac
 [<ffffffff8020ca70>] child_rip+0x0/0x20
Code: 89 c2 48 8b 00 48 85 c0 75 f5 48 8b 45 00 48 89 02 44 88 65 09 48 89 5d 00 31 c0 5b 5d 41 5c c3 53 48 85 d2 89 fb 48 89 d7 75 06 <48> 8b 56 10 eb 08 e8 73 f1 ff ff 48 89 c2 85 db 74 1a eb 13 0f
RIP  [<ffffffff8039646f>] acpi_ns_get_next_node+0xb/0x3c
 RSP <ffff88007f87fd30>
CR2: 0000000000000010
---[ end trace a7919e7f17c0a725 ]---

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-03-20 10:47:56 -07:00
..
2009-01-30 19:50:25 +05:30
2009-01-30 19:59:53 +05:30
2009-01-11 01:34:25 +01:00
2009-01-09 12:37:15 -08:00
2009-01-30 23:30:42 +05:30
2009-01-30 23:32:45 +05:30
2009-01-30 23:37:37 +05:30
2009-03-19 19:29:33 -07:00
2009-01-30 23:38:03 +05:30
2008-12-29 08:29:50 +01:00
2009-01-30 23:38:37 +05:30
2009-01-30 23:39:42 +05:30
2009-01-30 23:40:06 +05:30
2009-01-06 15:59:29 -08:00
2009-01-01 10:12:19 +10:30
2009-01-04 13:33:20 -08:00
2009-01-30 23:44:08 +05:30
2009-01-02 12:19:34 -08:00
2008-12-29 17:47:23 +10:00
2008-12-25 11:01:43 +11:00
2009-02-05 16:48:53 +11:00
2008-12-31 18:07:38 -05:00
2009-03-01 00:19:35 -08:00
2009-01-28 07:50:14 -08:00
2009-01-30 23:46:03 +05:30
2009-01-30 23:46:40 +05:30
2009-01-30 23:48:33 +05:30
2009-01-30 23:49:07 +05:30
2008-12-29 11:27:46 +02:00
2009-02-18 15:37:56 -08:00
2008-12-31 18:07:42 -05:00
2009-01-06 15:59:01 -08:00
2009-01-30 23:50:37 +05:30
2009-01-30 23:51:17 +05:30
2009-01-26 21:19:52 +01:00
2009-01-30 23:51:41 +05:30
2009-01-30 23:52:16 +05:30
2009-01-30 23:53:12 +05:30
2009-01-30 23:53:40 +05:30
2009-01-30 23:54:53 +05:30
2009-01-30 23:55:45 +05:30
2009-01-30 23:56:13 +05:30
2009-01-30 23:56:48 +05:30
2009-01-30 23:57:16 +05:30
2009-01-30 23:58:41 +05:30
2009-01-30 23:59:44 +05:30
2009-01-31 00:00:06 +05:30
2009-01-15 16:39:37 -08:00
2009-01-05 08:40:30 -08:00
2009-03-01 00:19:36 -08:00
2008-12-31 15:11:46 +01:00
2009-03-05 07:25:02 -05:00
2009-01-31 00:00:35 +05:30
2009-02-18 15:37:55 -08:00
2009-01-31 00:01:11 +05:30
2009-03-04 23:46:25 -08:00
2009-01-07 17:38:31 -05:00
2008-12-23 15:21:45 -05:00
2009-03-10 20:33:18 -04:00
2009-03-10 20:33:18 -04:00
2008-12-19 15:22:54 -05:00
2009-01-31 00:15:24 +05:30
2008-12-21 14:21:14 +11:00
2009-01-08 08:31:05 -08:00
2009-03-19 19:29:35 -07:00
2009-01-31 00:02:54 +05:30
2009-01-08 08:31:12 -08:00
2009-01-31 00:03:40 +05:30
2009-01-06 15:59:12 -08:00
2009-01-31 00:05:30 +05:30
2008-12-20 09:15:46 +01:00
2009-01-16 18:02:10 +01:00
2009-01-05 18:31:12 -08:00
2009-01-31 00:05:59 +05:30
2009-01-04 13:33:20 -08:00
2009-01-07 09:58:22 +11:00
2009-02-18 15:37:53 -08:00
2009-01-31 00:06:33 +05:30
2009-02-20 17:57:48 -08:00
2009-01-31 00:07:00 +05:30
2009-01-08 08:31:10 -08:00
2009-01-31 00:07:31 +05:30
2009-02-11 14:25:36 -08:00
2009-01-01 10:12:25 +10:30
2009-02-18 15:37:53 -08:00
2009-01-02 10:19:36 -08:00
2009-01-31 00:10:59 +05:30
2009-02-18 15:37:53 -08:00
2009-01-06 15:59:09 -08:00