panic about sysfs with adm1026

panic about sysfs with adm1026

[Yinghai Lu]

Calling initcall 0xffffffff80c4b575: sm_adm1026_init+0x0/0xe()
i2c-adapter i2c-1: : Unrecognized stepping 0x45. Defaulting to ADM1026.
general protection fault: 0000 [1] SMP
CPU 0
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.24-smp-09379-g0cf975e-dirty #34
RIP: 0010:[<ffffffff802d79ad>]  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
RSP: 0000:ffff81040503dd50  EFLAGS: 00010286
RAX: 0000000000000000 RBX: fffe002e002d002c RCX: 00000000000048d9
RDX: 0000000000000002 RSI: fffe002e002d002c RDI: ffff810202c4fb90
RBP: 0000000000000000 R08: ffff810202c4fb90 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000002 R12: 00000000fffffff4
R13: ffff810202c4fb90 R14: 000000000000000c R15: ffff810202c4fb90
FS:  0000000000000000(0000) GS:ffffffff80bde000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00007fff94de3470 CR3: 0000000000201000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 1, threadinfo ffff81040503c000, task ffff810205040000)
Stack:  ffff810202c4fb90 0000000000000000 0000000000000000 0000000000000001
 ffff810202c4e000 ffffffff80b87850 0000000000000000 ffff810202c4e118
 ffffffff808e0cc0 ffffffff802d933c ffff81040503dd55 ffff810202c17878
Call Trace:
 [<ffffffff802d933c>] sysfs_create_group+0xa2/0x106
 [<ffffffff8069fbc2>] adm1026_detect+0x4b3/0x522
 [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
 [<ffffffff80698bff>] i2c_probe_address+0xb9/0xfc
 [<ffffffff806997db>] i2c_probe+0x162/0x175
 [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
 [<ffffffff8069910f>] i2c_register_driver+0x9a/0xea
 [<ffffffff80c276d2>] kernel_init+0x15d/0x2c9
 [<ffffffff8021fc68>] child_rip+0xa/0x12
 [<ffffffff80c27575>] kernel_init+0x0/0x2c9
 [<ffffffff8021fc5e>] child_rip+0x0/0x12


Code: c0 84 c0 74 0c 41 58 48 89 df 5b 5d e9 2a 07 00 00 5e 5b 5d c3
41 55 49 89 fd 41 54 41 bc f4 ff ff ff 55 53 48 89 f3 48 83 ec 28 <8b>
76 10 48 8b 3b 66 81 e6 ff 0f 66 81 ce 00 80 0f b7 f6 e8 fd
RIP  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
 RSP <ffff81040503dd50>
---[ end trace b23a825db37d3043 ]---

Re: panic about sysfs with adm1026

[Greg KH]

On Sat, Feb 09, 2008 at 11:55:43PM -0800, Yinghai Lu wrote:
> Calling initcall 0xffffffff80c4b575: sm_adm1026_init+0x0/0xe()
> i2c-adapter i2c-1: : Unrecognized stepping 0x45. Defaulting to ADM1026.
> general protection fault: 0000 [1] SMP
> CPU 0
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.24-smp-09379-g0cf975e-dirty #34
> RIP: 0010:[<ffffffff802d79ad>]  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
> RSP: 0000:ffff81040503dd50  EFLAGS: 00010286
> RAX: 0000000000000000 RBX: fffe002e002d002c RCX: 00000000000048d9
> RDX: 0000000000000002 RSI: fffe002e002d002c RDI: ffff810202c4fb90
> RBP: 0000000000000000 R08: ffff810202c4fb90 R09: 0000000000000000
> R10: 0000000000000002 R11: 0000000000000002 R12: 00000000fffffff4
> R13: ffff810202c4fb90 R14: 000000000000000c R15: ffff810202c4fb90
> FS:  0000000000000000(0000) GS:ffffffff80bde000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 00007fff94de3470 CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 1, threadinfo ffff81040503c000, task ffff810205040000)
> Stack:  ffff810202c4fb90 0000000000000000 0000000000000000 0000000000000001
>  ffff810202c4e000 ffffffff80b87850 0000000000000000 ffff810202c4e118
>  ffffffff808e0cc0 ffffffff802d933c ffff81040503dd55 ffff810202c17878
> Call Trace:
>  [<ffffffff802d933c>] sysfs_create_group+0xa2/0x106
>  [<ffffffff8069fbc2>] adm1026_detect+0x4b3/0x522
>  [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
>  [<ffffffff80698bff>] i2c_probe_address+0xb9/0xfc
>  [<ffffffff806997db>] i2c_probe+0x162/0x175
>  [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
>  [<ffffffff8069910f>] i2c_register_driver+0x9a/0xea
>  [<ffffffff80c276d2>] kernel_init+0x15d/0x2c9
>  [<ffffffff8021fc68>] child_rip+0xa/0x12
>  [<ffffffff80c27575>] kernel_init+0x0/0x2c9
>  [<ffffffff8021fc5e>] child_rip+0x0/0x12
> 
> 
> Code: c0 84 c0 74 0c 41 58 48 89 df 5b 5d e9 2a 07 00 00 5e 5b 5d c3
> 41 55 49 89 fd 41 54 41 bc f4 ff ff ff 55 53 48 89 f3 48 83 ec 28 <8b>
> 76 10 48 8b 3b 66 81 e6 ff 0f 66 81 ce 00 80 0f b7 f6 e8 fd
> RIP  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
>  RSP <ffff81040503dd50>
> ---[ end trace b23a825db37d3043 ]---

Perhaps the adm1026 driver is not calling sysfs_create_group properly?

Jean, any ideas?

thanks,

greg k-h

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Yinghai Lu]

On Feb 10, 2008 10:01 AM, Jean Delvare <khali@linux-fr.org> wrote:
> On Sun, 10 Feb 2008 09:10:04 -0800, Greg KH wrote:
> > On Sat, Feb 09, 2008 at 11:55:43PM -0800, Yinghai Lu wrote:
> > > Calling initcall 0xffffffff80c4b575: sm_adm1026_init+0x0/0xe()
> > > i2c-adapter i2c-1: : Unrecognized stepping 0x45. Defaulting to ADM1026.
> > > general protection fault: 0000 [1] SMP
> > > CPU 0
> > > Modules linked in:
> > > Pid: 1, comm: swapper Not tainted 2.6.24-smp-09379-g0cf975e-dirty #34
> > > RIP: 0010:[<ffffffff802d79ad>]  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
> > > RSP: 0000:ffff81040503dd50  EFLAGS: 00010286
> > > RAX: 0000000000000000 RBX: fffe002e002d002c RCX: 00000000000048d9
> > > RDX: 0000000000000002 RSI: fffe002e002d002c RDI: ffff810202c4fb90
> > > RBP: 0000000000000000 R08: ffff810202c4fb90 R09: 0000000000000000
> > > R10: 0000000000000002 R11: 0000000000000002 R12: 00000000fffffff4
> > > R13: ffff810202c4fb90 R14: 000000000000000c R15: ffff810202c4fb90
> > > FS:  0000000000000000(0000) GS:ffffffff80bde000(0000) knlGS:0000000000000000
> > > CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> > > CR2: 00007fff94de3470 CR3: 0000000000201000 CR4: 00000000000006e0
> > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> > > Process swapper (pid: 1, threadinfo ffff81040503c000, task ffff810205040000)
> > > Stack:  ffff810202c4fb90 0000000000000000 0000000000000000 0000000000000001
> > >  ffff810202c4e000 ffffffff80b87850 0000000000000000 ffff810202c4e118
> > >  ffffffff808e0cc0 ffffffff802d933c ffff81040503dd55 ffff810202c17878
> > > Call Trace:
> > >  [<ffffffff802d933c>] sysfs_create_group+0xa2/0x106
> > >  [<ffffffff8069fbc2>] adm1026_detect+0x4b3/0x522
> > >  [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
> > >  [<ffffffff80698bff>] i2c_probe_address+0xb9/0xfc
> > >  [<ffffffff806997db>] i2c_probe+0x162/0x175
> > >  [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
> > >  [<ffffffff8069910f>] i2c_register_driver+0x9a/0xea
> > >  [<ffffffff80c276d2>] kernel_init+0x15d/0x2c9
> > >  [<ffffffff8021fc68>] child_rip+0xa/0x12
> > >  [<ffffffff80c27575>] kernel_init+0x0/0x2c9
> > >  [<ffffffff8021fc5e>] child_rip+0x0/0x12
> > >
> > >
> > > Code: c0 84 c0 74 0c 41 58 48 89 df 5b 5d e9 2a 07 00 00 5e 5b 5d c3
> > > 41 55 49 89 fd 41 54 41 bc f4 ff ff ff 55 53 48 89 f3 48 83 ec 28 <8b>
> > > 76 10 48 8b 3b 66 81 e6 ff 0f 66 81 ce 00 80 0f b7 f6 e8 fd
> > > RIP  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
> > >  RSP <ffff81040503dd50>
> > > ---[ end trace b23a825db37d3043 ]---
> >
> > Perhaps the adm1026 driver is not calling sysfs_create_group properly?
> >
> > Jean, any ideas?
>
> Yeah, I am an idiot. In 5b34dbcd88251508d02e48ad9b0f9b8232a13ee0 I
> introduced two new sysfs file groups but forgot to NULL-terminate them.
> Sorry about that, here's the fix:
>
> * * * * *
>
> The missing NULL at the end of two sysfs file groups causes a kernel
> crash when calling sysfs_create_group().
>
> Signed-off-by: Jean Delvare <khali@linux-fr.org>
> ---
>  drivers/hwmon/adm1026.c |    2 ++
>  1 file changed, 2 insertions(+)
>
> --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c       2008-02-10 11:21:54.000000000 +0100
> +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c    2008-02-10 18:51:00.000000000 +0100
> @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
>         &dev_attr_temp3_crit_enable.attr,
>         &dev_attr_temp3_auto_point1_pwm.attr,
>         &dev_attr_temp3_auto_point2_pwm.attr,
> +       NULL
>  };
>
>  static const struct attribute_group adm1026_group_temp3 = {
> @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
>         &sensor_dev_attr_in9_max.dev_attr.attr,
>         &sensor_dev_attr_in9_min.dev_attr.attr,
>         &sensor_dev_attr_in9_alarm.dev_attr.attr,
> +       NULL
>  };
>
>  static const struct attribute_group adm1026_group_in8_9 = {
>
> * * * * *
>
> Yinghai, the bug crept in because I do not have an ADM1026 chip to test
> my changes. Could you please send a dump of your chip to me, so that I
> can emulate it? This would avoid similar problems in the future.
>
> First you have to find out at which address the ADM1026 chip lives. The
> first line of "sensors" should tell, otherwise you can run "i2cdetect
> 1". The ADM1026 can live at 0x2c, 0x2d or 0x2e. Once you know the
> address, run the following command to get the dump:
>
> rmmod adm1026
> i2cdump 1 0x2d b
>
> (Replace 0x2d with the actual address.)

good, I will try it Monday.

YH

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Yinghai Lu]

On Feb 10, 2008 10:01 AM, Jean Delvare <khali@linux-fr.org> wrote:
> On Sun, 10 Feb 2008 09:10:04 -0800, Greg KH wrote:
> > On Sat, Feb 09, 2008 at 11:55:43PM -0800, Yinghai Lu wrote:
> > > Calling initcall 0xffffffff80c4b575: sm_adm1026_init+0x0/0xe()
> > > i2c-adapter i2c-1: : Unrecognized stepping 0x45. Defaulting to ADM1026.
> > > general protection fault: 0000 [1] SMP
> > > CPU 0
> > > Modules linked in:
> > > Pid: 1, comm: swapper Not tainted 2.6.24-smp-09379-g0cf975e-dirty #34
> > > RIP: 0010:[<ffffffff802d79ad>]  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
> > > RSP: 0000:ffff81040503dd50  EFLAGS: 00010286
> > > RAX: 0000000000000000 RBX: fffe002e002d002c RCX: 00000000000048d9
> > > RDX: 0000000000000002 RSI: fffe002e002d002c RDI: ffff810202c4fb90
> > > RBP: 0000000000000000 R08: ffff810202c4fb90 R09: 0000000000000000
> > > R10: 0000000000000002 R11: 0000000000000002 R12: 00000000fffffff4
> > > R13: ffff810202c4fb90 R14: 000000000000000c R15: ffff810202c4fb90
> > > FS:  0000000000000000(0000) GS:ffffffff80bde000(0000) knlGS:0000000000000000
> > > CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> > > CR2: 00007fff94de3470 CR3: 0000000000201000 CR4: 00000000000006e0
> > > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> > > Process swapper (pid: 1, threadinfo ffff81040503c000, task ffff810205040000)
> > > Stack:  ffff810202c4fb90 0000000000000000 0000000000000000 0000000000000001
> > >  ffff810202c4e000 ffffffff80b87850 0000000000000000 ffff810202c4e118
> > >  ffffffff808e0cc0 ffffffff802d933c ffff81040503dd55 ffff810202c17878
> > > Call Trace:
> > >  [<ffffffff802d933c>] sysfs_create_group+0xa2/0x106
> > >  [<ffffffff8069fbc2>] adm1026_detect+0x4b3/0x522
> > >  [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
> > >  [<ffffffff80698bff>] i2c_probe_address+0xb9/0xfc
> > >  [<ffffffff806997db>] i2c_probe+0x162/0x175
> > >  [<ffffffff8069f70f>] adm1026_detect+0x0/0x522
> > >  [<ffffffff8069910f>] i2c_register_driver+0x9a/0xea
> > >  [<ffffffff80c276d2>] kernel_init+0x15d/0x2c9
> > >  [<ffffffff8021fc68>] child_rip+0xa/0x12
> > >  [<ffffffff80c27575>] kernel_init+0x0/0x2c9
> > >  [<ffffffff8021fc5e>] child_rip+0x0/0x12
> > >
> > >
> > > Code: c0 84 c0 74 0c 41 58 48 89 df 5b 5d e9 2a 07 00 00 5e 5b 5d c3
> > > 41 55 49 89 fd 41 54 41 bc f4 ff ff ff 55 53 48 89 f3 48 83 ec 28 <8b>
> > > 76 10 48 8b 3b 66 81 e6 ff 0f 66 81 ce 00 80 0f b7 f6 e8 fd
> > > RIP  [<ffffffff802d79ad>] sysfs_add_file+0x16/0x81
> > >  RSP <ffff81040503dd50>
> > > ---[ end trace b23a825db37d3043 ]---
> >
> > Perhaps the adm1026 driver is not calling sysfs_create_group properly?
> >
> > Jean, any ideas?
>
> Yeah, I am an idiot. In 5b34dbcd88251508d02e48ad9b0f9b8232a13ee0 I
> introduced two new sysfs file groups but forgot to NULL-terminate them.
> Sorry about that, here's the fix:
>
> * * * * *
>
> The missing NULL at the end of two sysfs file groups causes a kernel
> crash when calling sysfs_create_group().
>
> Signed-off-by: Jean Delvare <khali@linux-fr.org>
> ---
>  drivers/hwmon/adm1026.c |    2 ++
>  1 file changed, 2 insertions(+)
>
> --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c       2008-02-10 11:21:54.000000000 +0100
> +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c    2008-02-10 18:51:00.000000000 +0100
> @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
>         &dev_attr_temp3_crit_enable.attr,
>         &dev_attr_temp3_auto_point1_pwm.attr,
>         &dev_attr_temp3_auto_point2_pwm.attr,
> +       NULL
>  };
>
>  static const struct attribute_group adm1026_group_temp3 = {
> @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
>         &sensor_dev_attr_in9_max.dev_attr.attr,
>         &sensor_dev_attr_in9_min.dev_attr.attr,
>         &sensor_dev_attr_in9_alarm.dev_attr.attr,
> +       NULL
>  };
>
>  static const struct attribute_group adm1026_group_in8_9 = {
>
> * * * * *

it works. Thanks

>
> Yinghai, the bug crept in because I do not have an ADM1026 chip to test
> my changes. Could you please send a dump of your chip to me, so that I
> can emulate it? This would avoid similar problems in the future.
>
> First you have to find out at which address the ADM1026 chip lives. The
> first line of "sensors" should tell, otherwise you can run "i2cdetect
> 1". The ADM1026 can live at 0x2c, 0x2d or 0x2e. Once you know the
> address, run the following command to get the dump:
>
> rmmod adm1026
> i2cdump 1 0x2d b

LBSuse:/x/kernel.org # ./i2cdetect 1
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-1.
I will probe address range 0x03-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- 08 -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 19 -- -- 1c 1d -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- UU UU -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 41 -- -- -- -- -- -- 48 49 4a -- -- -- -- --
50: UU UU UU UU UU UU -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
LBSuse:/x/kernel.org # ./i2cdump 1 0x2c b
Error: Could not set address to 0x2c: Device or resource busy
LBSuse:/x/kernel.org # ./i2cdump 1 0x2d b
Error: Could not set address to 0x2d: Device or resource busy

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Jean Delvare]

Hi Yinghai,

On Mon, 11 Feb 2008 15:39:39 -0800, Yinghai Lu wrote:
> On Feb 10, 2008 10:01 AM, Jean Delvare <khali@linux-fr.org> wrote:
> > Yeah, I am an idiot. In 5b34dbcd88251508d02e48ad9b0f9b8232a13ee0 I
> > introduced two new sysfs file groups but forgot to NULL-terminate them.
> > Sorry about that, here's the fix:
> >
> > * * * * *
> >
> > The missing NULL at the end of two sysfs file groups causes a kernel
> > crash when calling sysfs_create_group().
> >
> > Signed-off-by: Jean Delvare <khali@linux-fr.org>
> > ---
> >  drivers/hwmon/adm1026.c |    2 ++
> >  1 file changed, 2 insertions(+)
> >
> > --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c       2008-02-10 11:21:54.000000000 +0100
> > +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c    2008-02-10 18:51:00.000000000 +0100
> > @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
> >         &dev_attr_temp3_crit_enable.attr,
> >         &dev_attr_temp3_auto_point1_pwm.attr,
> >         &dev_attr_temp3_auto_point2_pwm.attr,
> > +       NULL
> >  };
> >
> >  static const struct attribute_group adm1026_group_temp3 = {
> > @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
> >         &sensor_dev_attr_in9_max.dev_attr.attr,
> >         &sensor_dev_attr_in9_min.dev_attr.attr,
> >         &sensor_dev_attr_in9_alarm.dev_attr.attr,
> > +       NULL
> >  };
> >
> >  static const struct attribute_group adm1026_group_in8_9 = {
> >
> > * * * * *
> 
> it works. Thanks

Great, thanks. Mark, please include this patch in your next patch to
Linus for 2.6.25.

> > Yinghai, the bug crept in because I do not have an ADM1026 chip to test
> > my changes. Could you please send a dump of your chip to me, so that I
> > can emulate it? This would avoid similar problems in the future.
> >
> > First you have to find out at which address the ADM1026 chip lives. The
> > first line of "sensors" should tell, otherwise you can run "i2cdetect
> > 1". The ADM1026 can live at 0x2c, 0x2d or 0x2e. Once you know the
> > address, run the following command to get the dump:
> >
> > rmmod adm1026
> > i2cdump 1 0x2d b
> 
> LBSuse:/x/kernel.org # ./i2cdetect 1
> WARNING! This program can confuse your I2C bus, cause data loss and worse!
> I will probe file /dev/i2c-1.
> I will probe address range 0x03-0x77.
> Continue? [Y/n] y
>      0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
> 00:          -- -- -- -- -- 08 -- -- -- -- -- -- --
> 10: -- -- -- -- -- -- -- -- 18 19 -- -- 1c 1d -- --
> 20: -- -- -- -- -- -- -- -- -- -- -- -- UU UU -- --
> 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 40: 40 41 -- -- -- -- -- -- 48 49 4a -- -- -- -- --
> 50: UU UU UU UU UU UU -- -- -- -- -- -- -- -- -- --
> 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
> 70: -- -- -- -- -- -- -- --
> LBSuse:/x/kernel.org # ./i2cdump 1 0x2c b
> Error: Could not set address to 0x2c: Device or resource busy
> LBSuse:/x/kernel.org # ./i2cdump 1 0x2d b
> Error: Could not set address to 0x2d: Device or resource busy

You must unload the adm1026 driver before dumping (see the "rmmod
adm1026" above in my example.)

Thanks,
-- 
Jean Delvare

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Greg KH]

On Tue, Feb 12, 2008 at 09:27:22AM +0100, Jean Delvare wrote:
> Hi Yinghai,
> 
> On Mon, 11 Feb 2008 15:39:39 -0800, Yinghai Lu wrote:
> > On Feb 10, 2008 10:01 AM, Jean Delvare <khali@linux-fr.org> wrote:
> > > Yeah, I am an idiot. In 5b34dbcd88251508d02e48ad9b0f9b8232a13ee0 I
> > > introduced two new sysfs file groups but forgot to NULL-terminate them.
> > > Sorry about that, here's the fix:
> > >
> > > * * * * *
> > >
> > > The missing NULL at the end of two sysfs file groups causes a kernel
> > > crash when calling sysfs_create_group().
> > >
> > > Signed-off-by: Jean Delvare <khali@linux-fr.org>
> > > ---
> > >  drivers/hwmon/adm1026.c |    2 ++
> > >  1 file changed, 2 insertions(+)
> > >
> > > --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c       2008-02-10 11:21:54.000000000 +0100
> > > +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c    2008-02-10 18:51:00.000000000 +0100
> > > @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
> > >         &dev_attr_temp3_crit_enable.attr,
> > >         &dev_attr_temp3_auto_point1_pwm.attr,
> > >         &dev_attr_temp3_auto_point2_pwm.attr,
> > > +       NULL
> > >  };
> > >
> > >  static const struct attribute_group adm1026_group_temp3 = {
> > > @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
> > >         &sensor_dev_attr_in9_max.dev_attr.attr,
> > >         &sensor_dev_attr_in9_min.dev_attr.attr,
> > >         &sensor_dev_attr_in9_alarm.dev_attr.attr,
> > > +       NULL
> > >  };
> > >
> > >  static const struct attribute_group adm1026_group_in8_9 = {
> > >
> > > * * * * *
> > 
> > it works. Thanks
> 
> Great, thanks. Mark, please include this patch in your next patch to
> Linus for 2.6.25.

Can someone send it to stable@kernel.org also when it goes into Linus's
tree, as it looks like a pretty bad thing :)

thanks,

greg k-h

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Jean Delvare]

On Tue, 12 Feb 2008 07:27:15 -0800, Greg KH wrote:
> On Tue, Feb 12, 2008 at 09:27:22AM +0100, Jean Delvare wrote:
> > Hi Yinghai,
> > 
> > On Mon, 11 Feb 2008 15:39:39 -0800, Yinghai Lu wrote:
> > > On Feb 10, 2008 10:01 AM, Jean Delvare <khali@linux-fr.org> wrote:
> > > > Yeah, I am an idiot. In 5b34dbcd88251508d02e48ad9b0f9b8232a13ee0 I
> > > > introduced two new sysfs file groups but forgot to NULL-terminate them.
> > > > Sorry about that, here's the fix:
> > > >
> > > > * * * * *
> > > >
> > > > The missing NULL at the end of two sysfs file groups causes a kernel
> > > > crash when calling sysfs_create_group().
> > > >
> > > > Signed-off-by: Jean Delvare <khali@linux-fr.org>
> > > > ---
> > > >  drivers/hwmon/adm1026.c |    2 ++
> > > >  1 file changed, 2 insertions(+)
> > > >
> > > > --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c       2008-02-10 11:21:54.000000000 +0100
> > > > +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c    2008-02-10 18:51:00.000000000 +0100
> > > > @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
> > > >         &dev_attr_temp3_crit_enable.attr,
> > > >         &dev_attr_temp3_auto_point1_pwm.attr,
> > > >         &dev_attr_temp3_auto_point2_pwm.attr,
> > > > +       NULL
> > > >  };
> > > >
> > > >  static const struct attribute_group adm1026_group_temp3 = {
> > > > @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
> > > >         &sensor_dev_attr_in9_max.dev_attr.attr,
> > > >         &sensor_dev_attr_in9_min.dev_attr.attr,
> > > >         &sensor_dev_attr_in9_alarm.dev_attr.attr,
> > > > +       NULL
> > > >  };
> > > >
> > > >  static const struct attribute_group adm1026_group_in8_9 = {
> > > >
> > > > * * * * *
> > > 
> > > it works. Thanks
> > 
> > Great, thanks. Mark, please include this patch in your next patch to
> > Linus for 2.6.25.
> 
> Can someone send it to stable@kernel.org also when it goes into Linus's
> tree, as it looks like a pretty bad thing :)

I certainly could, but then you would laugh at me because 2.6.24 isn't
affected by the bug.

-- 
Jean Delvare

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Greg KH]

On Tue, Feb 12, 2008 at 04:37:33PM +0100, Jean Delvare wrote:
> On Tue, 12 Feb 2008 07:27:15 -0800, Greg KH wrote:
> > On Tue, Feb 12, 2008 at 09:27:22AM +0100, Jean Delvare wrote:
> > > Hi Yinghai,
> > > 
> > > On Mon, 11 Feb 2008 15:39:39 -0800, Yinghai Lu wrote:
> > > > On Feb 10, 2008 10:01 AM, Jean Delvare <khali@linux-fr.org> wrote:
> > > > > Yeah, I am an idiot. In 5b34dbcd88251508d02e48ad9b0f9b8232a13ee0 I
> > > > > introduced two new sysfs file groups but forgot to NULL-terminate them.
> > > > > Sorry about that, here's the fix:
> > > > >
> > > > > * * * * *
> > > > >
> > > > > The missing NULL at the end of two sysfs file groups causes a kernel
> > > > > crash when calling sysfs_create_group().
> > > > >
> > > > > Signed-off-by: Jean Delvare <khali@linux-fr.org>
> > > > > ---
> > > > >  drivers/hwmon/adm1026.c |    2 ++
> > > > >  1 file changed, 2 insertions(+)
> > > > >
> > > > > --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c       2008-02-10 11:21:54.000000000 +0100
> > > > > +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c    2008-02-10 18:51:00.000000000 +0100
> > > > > @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
> > > > >         &dev_attr_temp3_crit_enable.attr,
> > > > >         &dev_attr_temp3_auto_point1_pwm.attr,
> > > > >         &dev_attr_temp3_auto_point2_pwm.attr,
> > > > > +       NULL
> > > > >  };
> > > > >
> > > > >  static const struct attribute_group adm1026_group_temp3 = {
> > > > > @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
> > > > >         &sensor_dev_attr_in9_max.dev_attr.attr,
> > > > >         &sensor_dev_attr_in9_min.dev_attr.attr,
> > > > >         &sensor_dev_attr_in9_alarm.dev_attr.attr,
> > > > > +       NULL
> > > > >  };
> > > > >
> > > > >  static const struct attribute_group adm1026_group_in8_9 = {
> > > > >
> > > > > * * * * *
> > > > 
> > > > it works. Thanks
> > > 
> > > Great, thanks. Mark, please include this patch in your next patch to
> > > Linus for 2.6.25.
> > 
> > Can someone send it to stable@kernel.org also when it goes into Linus's
> > tree, as it looks like a pretty bad thing :)
> 
> I certainly could, but then you would laugh at me because 2.6.24 isn't
> affected by the bug.

Heh, my fault, for some reason I thought this was a 2.6.24 bug, sorry :)

greg k-h

Re: [lm-sensors] [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[MillTek]

Hi,
Kernel 2.6.24 for my distro (Arch Linux) came out in the last few days. 
My board has a Fintek F1882g chip. It means that I can finally get 
voltage and fan speeds for the board, so thanks for that.  I am 
wondering how I correctly calculate the correct offset and factors for 
the voltage numbers? This is what GKrellm says;

Vcor1  1.66  factor 1 offset 0
Vcor2  1.24  factor 1 offset 0
+3.3v   2.83  factor 3  offset 0
+5v      4.82  factor 4.98 offset 0
+12v    3.84 factor 4.0  offset 0
-12v    -4.35  factor -4.0 offset 0
-5v      -1.51  factor -1.667 offset 0
in7      1.66    factor 1  offset 0
in8       1.54   factor 1 offset 0

If there's a website that I should visit can anyone supply a link??


Jim

Re: [PATCH] hwmon: (adm1026) Properly terminate sysfs groups (Was: panic about sysfs with adm1026)

[Mark M. Hoffman]

Hi Jean et. al.:

* Jean Delvare <khali@linux-fr.org> [2008-02-10 19:01:15 +0100]:
> The missing NULL at the end of two sysfs file groups causes a kernel
> crash when calling sysfs_create_group().
> 
> Signed-off-by: Jean Delvare <khali@linux-fr.org>
> ---
>  drivers/hwmon/adm1026.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> --- linux-2.6.25-rc0.orig/drivers/hwmon/adm1026.c	2008-02-10 11:21:54.000000000 +0100
> +++ linux-2.6.25-rc0/drivers/hwmon/adm1026.c	2008-02-10 18:51:00.000000000 +0100
> @@ -1624,6 +1624,7 @@ static struct attribute *adm1026_attribu
>  	&dev_attr_temp3_crit_enable.attr,
>  	&dev_attr_temp3_auto_point1_pwm.attr,
>  	&dev_attr_temp3_auto_point2_pwm.attr,
> +	NULL
>  };
>  
>  static const struct attribute_group adm1026_group_temp3 = {
> @@ -1639,6 +1640,7 @@ static struct attribute *adm1026_attribu
>  	&sensor_dev_attr_in9_max.dev_attr.attr,
>  	&sensor_dev_attr_in9_min.dev_attr.attr,
>  	&sensor_dev_attr_in9_alarm.dev_attr.attr,
> +	NULL
>  };
>  
>  static const struct attribute_group adm1026_group_in8_9 = {

Applied to hwmon-2.6.git/testing, thanks.

-- 
Mark M. Hoffman
mhoffman@lightlink.com