Messages in this thread Patch in this message | | | Date | Tue, 06 Dec 2005 19:32:37 +0100 | From | Carl-Daniel Hailfinger <> | Subject | [PATCH] Fix oops in asus_acpi.c on Samsung P30/P35 Laptops |
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Hi,
on insmod of asus_acpi on my Samsung P35 laptop I get the following Oops (perfectly reproducible):
Asus Laptop ACPI Extras version 0.29 Unable to handle kernel NULL pointer dereference at virtual address 00000000 printing eip: e1dfc362 *pde = 00000000 Oops: 0000 [#1] Modules linked in: asus_acpi thermal processor fan button battery ac snd_pcm_oss snd_mixer_oss snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_timer snd soundcore snd_page_alloc ipt_TOS ipt_LOG ipt_limit ipt_pkttype pcmcia firmware_class ipt_state ip6t_REJECT ipt_REJECT iptable_mangle iptable_nat iptable_filter ip6table_mangle ip_nat_ftp ip_nat ip_conntrack_ftp ip_conntrack nfnetlink ip_tables ip6table_filter ip6_tables ipv6 evdev sg sd_mod sr_mod scsi_mod intel_agp agpgart ohci1394 ieee1394 yenta_socket rsrc_nonstatic pcmcia_core ehci_hcd uhci_hcd i2c_i801 joydev dm_mod usbcore 8139too mii reiserfs ide_cd cdrom ide_disk piix ide_core CPU: 0 EIP: 0060:[<e1dfc362>] Not tainted VLI EFLAGS: 00010203 (2.6.15-rc5) EIP is at asus_hotk_get_info+0x17f/0x76c [asus_acpi] eax: def75000 ebx: de8aaf54 ecx: 00000002 edx: 00000003 esi: 00000000 edi: e1e82a9c ebp: dde2fea0 esp: de8aaf48 ds: 007b es: 007b ss: 0068 Process modprobe (pid: 6566, threadinfo=de8aa000 task=ddac05b0) Stack: 00000000 00005105 deef8000 00000010 dde2fea0 dfeddc00 e1e83196 dfeddc84 dfedd820 e1dfc982 e1dfca11 dfeddc00 e1e849e0 00000000 c021c2fa dfeddc00 e1e849e0 c021c39e e1e84b00 0805bc08 00000028 de8aa000 e1dfcb20 c0133b32 Call Trace: [<e1dfc982>] asus_hotk_check+0x33/0x34 [asus_acpi] [<e1dfca11>] asus_hotk_add+0x8e/0x148 [asus_acpi] [<c021c2fa>] acpi_bus_driver_init+0x2e/0x57 [<c021c39e>] acpi_driver_attach+0x3e/0x63 [<e1dfcb20>] asus_acpi_init+0x55/0x7d [asus_acpi] [<c0133b32>] sys_init_module+0xf2/0x180 [<c0102e6f>] sysenter_past_esp+0x54/0x75 Code: 08 68 7f 30 e8 e1 e8 0e f2 31 de 58 5a a1 10 4d e8 e1 ba 03 00 00 00 bf 9c 2a e8 e1 89 d1 c7 40 14 12 00 00 00 8b 75 08 49 78 08 <ac> ae 75 08 84 c0 75 f5 31 c0 eb 04 19 c0 0c 01 85 c0 75 11 a1
This oops affects all kernels since 2.6.12. Patch follows. Please apply.
Regards, Carl-Daniel
From: Christian Aichinger <Greek0@gmx.net> Subject: [PATCH] acpi: Fix oops in asus_acpi.c on Samsung P30/P35 Laptops Date: 2005-09-23 23:36:25 GMT
Samsung P35's INIT returns an integer (instead of a string or a plain buffer), which caused an oops when the result was treated as string in asus_hotk_get_info() (since an invalid pointer got dereferenced).
This patch explicitly checks for ACPI_TYPE_INTEGER and for the return values possible on the P30/P35.
Signed-off-by: Christian Aichinger <Greek0@gmx.net> ---
drivers/acpi/asus_acpi.c | 31 ++++++++++++++++++++++++++++--- 1 files changed, 28 insertions(+), 3 deletions(-)
c51f431351c648519a9b91de3c5e1d636246d7bc diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c --- a/drivers/acpi/asus_acpi.c +++ b/drivers/acpi/asus_acpi.c @@ -1006,6 +1006,24 @@ static int __init asus_hotk_get_info(voi }
model = (union acpi_object *)buffer.pointer; + + /* INIT on Samsung's P35 returns an integer, possible return + * values are tested below */ + if (model->type == ACPI_TYPE_INTEGER) { + if (model->integer.value == -1 || + model->integer.value == 0x58 || + model->integer.value == 0x38) { + hotk->model = P30; + printk(KERN_NOTICE + " Samsung P35 detected, supported\n"); + goto out_known; + } else { + printk(KERN_WARNING + " unknown integer returned by INIT\n"); + goto out_unknown; + } + } + if (model->type == ACPI_TYPE_STRING) { printk(KERN_NOTICE " %s model detected, ", model->string.pointer); @@ -1057,9 +1075,7 @@ static int __init asus_hotk_get_info(voi hotk->model = L5x;
if (hotk->model == END_MODEL) { - printk("unsupported, trying default values, supply the " - "developers with your DSDT\n"); - hotk->model = M2E; + goto out_unknown; } else { printk("supported\n"); } @@ -1088,6 +1104,15 @@ static int __init asus_hotk_get_info(voi acpi_os_free(model);
return AE_OK; + +out_unknown: + printk(KERN_WARNING " unsupported, trying default values, " + "supply the developers with your DSDT\n"); + hotk->model = M2E; +out_known: + hotk->methods = &model_conf[hotk->model]; + acpi_os_free(model); + return AE_OK; }
static int __init asus_hotk_check(void)
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