Bug 9375

Summary:	divide error: 0000 [#1] with VIA Velocity when unplugged
Product:	Other	Reporter:	Jon Nelson (jnelson-kernel-bugzilla)
Component:	Other	Assignee:	Ingo Molnar (mingo)
Status:	REJECTED UNREPRODUCIBLE
Severity:	normal	CC:	mingo, randy.dunlap
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.22.12 (openSUSE 10.3)	Subsystem:
Regression:	---	Bisected commit-id:

Description Jon Nelson 2007-11-13 20:48:42 UTC

Most recent kernel where this bug did not occur: I've never seen it before.
Distribution: openSUSE 10.3
Hardware Environment: AMD Athlon 2200+
Software Environment: openSUSE 10.3
Problem Description: I unplugged my VIA Velocity and plugged it back into a switch and shortly thereafter it gacked.

I ran 'ip -s -s link show dev eth1' which sigsegd (this machine has been rock solid for YEARS so I know it's not the hardware) and the machine locked up. The blinkenlights on the switch continued to blink but according to tcpdump no traffic was flowing from this machine. A reboot later confirmed a problem and I found this in the /var/log/messages file:


Nov 13 22:26:54 frank kernel: divide error: 0000 [#1]
Nov 13 22:26:54 frank kernel: SMP
Nov 13 22:26:54 frank kernel: last sysfs file: /block/drbd0/range
Nov 13 22:26:54 frank kernel: Modules linked in: drbd xt_tcpudp xt_pkttype ipt_LOG xt_limit snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device nfs lockd nfs_acl sunrpc af_packet ipt_REJECT xt_state iptable_mangle iptable_nat nf_nat iptable_filter nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables ip6_tables x_tables tcp_bic apparmor dm_crypt loop dm_mirror dm_log dm_mod snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd i2c_sis96x soundcore parport_pc button sr_mod via_velocity sis_agp rtc_cmos shpchp i2c_sis630 cdrom i2c_co
re parport agpgart snd_page_alloc rtc_core rtc_lib pci_hotplug crc_ccitt sg usbhid hid ff_memless ehci_hcd sd_mod ohci_hcd usbcore piix sis5513 ide_core edd ext3 mbcache jbd fan pata_sis libata scsi_mod thermal processor
Nov 13 22:26:54 frank kernel: CPU:    0
Nov 13 22:26:54 frank kernel: EIP:    0060:[<c0266de0>]    Tainted: G      N VLI
Nov 13 22:26:54 frank kernel: EFLAGS: 00200287   (2.6.22.12-0.1-default #1)
Nov 13 22:26:54 frank kernel: EIP is at sys_socketcall+0x21/0x261
Nov 13 22:26:54 frank kernel: eax: 00000001   ebx: 0000000c   ecx: 00000001   edx: ffffffea
Nov 13 22:26:54 frank kernel: esi: bfdaa27c   edi: 00000000   ebp: ef1b8000   esp: ef1b9f78
Nov 13 22:26:54 frank kernel: ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Nov 13 22:26:54 frank kernel: Process ip (pid: 4350, ti=ef1b8000 task=f3d4eab0 task.ti=ef1b8000)
Nov 13 22:26:54 frank kernel: Stack: 40000003 00000000 f3d4ebd8 08073160 bfdaa140 ef1b9fb8 00000000 c0107e49
Nov 13 22:26:54 frank kernel:        bfdaa140 08073160 bfdaa27c 00000001 00000001 bfdaa27c 08073184 c0104ea2
Nov 13 22:26:54 frank kernel:        00000001 bfdaa140 08073160 bfdaa27c 08073184 bfdaa178 ffffffda 0000007b
Nov 13 22:26:54 frank kernel: Call Trace:
Nov 13 22:26:54 frank kernel:  [<c0107e49>] do_syscall_trace+0x12c/0x173
Nov 13 22:26:54 frank kernel:  [<c0104ea2>] syscall_call+0x7/0xb
Nov 13 22:26:54 frank kernel:  =======================
Nov 13 22:26:54 frank kernel: Code: c4 94 00 00 00 5b 5e 5f 5d c3 57 ba ea ff ff ff 56 53 83 ec 30 8b 44 24 40 8d 78 ff 83 ff 10 0f 87
 3d 02 00 00 8a 98 68 32 2e c0 <8d> 74 24 18 8b 54 24 44 89 f0 0f b6 cb e8 2a 9b f6 ff ba f2 ff
Nov 13 22:26:54 frank kernel: EIP: [<c0266de0>] sys_socketcall+0x21/0x261 SS:ESP 0068:ef1b9f78


I am willing and eager to help debug kernel problems, I merely require instructions and time.

Comment 1 Anonymous Emailer 2007-11-13 21:19:08 UTC

Reply-To: akpm@linux-foundation.org


(plesae respond via emailed reply-to-all)

On Tue, 13 Nov 2007 20:48:44 -0800 (PST) bugme-daemon@bugzilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9375
> 
>            Summary: divide error: 0000 [#1] with VIA Velocity when unplugged
>            Product: Other
>            Version: 2.5
>      KernelVersion: 2.6.22.12 (openSUSE 10.3)
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>         AssignedTo: other_other@kernel-bugs.osdl.org
>         ReportedBy: jnelson-kernel-bugzilla@jamponi.net
> 
> 
> Most recent kernel where this bug did not occur: I've never seen it before.
> Distribution: openSUSE 10.3
> Hardware Environment: AMD Athlon 2200+
> Software Environment: openSUSE 10.3
> Problem Description: I unplugged my VIA Velocity and plugged it back into a
> switch and shortly thereafter it gacked.
> 
> I ran 'ip -s -s link show dev eth1' which sigsegd (this machine has been rock
> solid for YEARS so I know it's not the hardware) and the machine locked up.
> The
> blinkenlights on the switch continued to blink but according to tcpdump no
> traffic was flowing from this machine. A reboot later confirmed a problem and
> I
> found this in the /var/log/messages file:
> 
> 
> Nov 13 22:26:54 frank kernel: divide error: 0000 [#1]
> Nov 13 22:26:54 frank kernel: SMP
> Nov 13 22:26:54 frank kernel: last sysfs file: /block/drbd0/range
> Nov 13 22:26:54 frank kernel: Modules linked in: drbd xt_tcpudp xt_pkttype
> ipt_LOG xt_limit snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device nfs lockd
> nfs_acl sunrpc af_packet ipt_REJECT xt_state iptable_mangle iptable_nat
> nf_nat
> iptable_filter nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables ip6_tables
> x_tables tcp_bic apparmor dm_crypt loop dm_mirror dm_log dm_mod snd_intel8x0
> snd_ac97_codec ac97_bus snd_pcm snd_timer snd i2c_sis96x soundcore parport_pc
> button sr_mod via_velocity sis_agp rtc_cmos shpchp i2c_sis630 cdrom i2c_co
> re parport agpgart snd_page_alloc rtc_core rtc_lib pci_hotplug crc_ccitt sg
> usbhid hid ff_memless ehci_hcd sd_mod ohci_hcd usbcore piix sis5513 ide_core
> edd ext3 mbcache jbd fan pata_sis libata scsi_mod thermal processor
> Nov 13 22:26:54 frank kernel: CPU:    0
> Nov 13 22:26:54 frank kernel: EIP:    0060:[<c0266de0>]    Tainted: G      N
> VLI
> Nov 13 22:26:54 frank kernel: EFLAGS: 00200287   (2.6.22.12-0.1-default #1)
> Nov 13 22:26:54 frank kernel: EIP is at sys_socketcall+0x21/0x261
> Nov 13 22:26:54 frank kernel: eax: 00000001   ebx: 0000000c   ecx: 00000001  
> edx: ffffffea
> Nov 13 22:26:54 frank kernel: esi: bfdaa27c   edi: 00000000   ebp: ef1b8000  
> esp: ef1b9f78
> Nov 13 22:26:54 frank kernel: ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss:
> 0068
> Nov 13 22:26:54 frank kernel: Process ip (pid: 4350, ti=ef1b8000
> task=f3d4eab0
> task.ti=ef1b8000)
> Nov 13 22:26:54 frank kernel: Stack: 40000003 00000000 f3d4ebd8 08073160
> bfdaa140 ef1b9fb8 00000000 c0107e49
> Nov 13 22:26:54 frank kernel:        bfdaa140 08073160 bfdaa27c 00000001
> 00000001 bfdaa27c 08073184 c0104ea2
> Nov 13 22:26:54 frank kernel:        00000001 bfdaa140 08073160 bfdaa27c
> 08073184 bfdaa178 ffffffda 0000007b
> Nov 13 22:26:54 frank kernel: Call Trace:
> Nov 13 22:26:54 frank kernel:  [<c0107e49>] do_syscall_trace+0x12c/0x173
> Nov 13 22:26:54 frank kernel:  [<c0104ea2>] syscall_call+0x7/0xb
> Nov 13 22:26:54 frank kernel:  =======================
> Nov 13 22:26:54 frank kernel: Code: c4 94 00 00 00 5b 5e 5f 5d c3 57 ba ea ff
> ff ff 56 53 83 ec 30 8b 44 24 40 8d 78 ff 83 ff 10 0f 87
>  3d 02 00 00 8a 98 68 32 2e c0 <8d> 74 24 18 8b 54 24 44 89 f0 0f b6 cb e8 2a
> 9b f6 ff ba f2 ff
> Nov 13 22:26:54 frank kernel: EIP: [<c0266de0>] sys_socketcall+0x21/0x261
> SS:ESP 0068:ef1b9f78
> 
> 

hm, I see no divide instruction near the start of 2.6.22's
sys_socketcall().  I'm wondering if some patch which opensuse has added is
causing this.  If you have the source handy can you show us what it looks like?
That's net/socket.c, the 50-odd lines after

asmlinkage long sys_socketcall(int call, unsigned long __user *args)


What caused the kernel taint, btw?

Thanks.

Comment 2 Randy Dunlap 2007-11-13 21:27:49 UTC

bugme-daemon@bugzilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=9375
> 
> 
> 
> 
> 
> ------- Comment #1 from anonymous@kernel-bugs.osdl.org  2007-11-13 21:19
> -------
> Reply-To: akpm@linux-foundation.org
> 
> 
> (plesae respond via emailed reply-to-all)
> 
> On Tue, 13 Nov 2007 20:48:44 -0800 (PST) bugme-daemon@bugzilla.kernel.org
> wrote:
> 
>> http://bugzilla.kernel.org/show_bug.cgi?id=9375
>>
>>            Summary: divide error: 0000 [#1] with VIA Velocity when unplugged
>>            Product: Other
>>            Version: 2.5
>>      KernelVersion: 2.6.22.12 (openSUSE 10.3)
>>           Platform: All
>>         OS/Version: Linux
>>               Tree: Mainline
>>             Status: NEW
>>           Severity: normal
>>           Priority: P1
>>          Component: Other
>>         AssignedTo: other_other@kernel-bugs.osdl.org
>>         ReportedBy: jnelson-kernel-bugzilla@jamponi.net
>>
>>
>> Most recent kernel where this bug did not occur: I've never seen it before.
>> Distribution: openSUSE 10.3
>> Hardware Environment: AMD Athlon 2200+
>> Software Environment: openSUSE 10.3
>> Problem Description: I unplugged my VIA Velocity and plugged it back into a
>> switch and shortly thereafter it gacked.
>>
>> I ran 'ip -s -s link show dev eth1' which sigsegd (this machine has been
>> rock
>> solid for YEARS so I know it's not the hardware) and the machine locked up.
>> The
>> blinkenlights on the switch continued to blink but according to tcpdump no
>> traffic was flowing from this machine. A reboot later confirmed a problem
>> and I
>> found this in the /var/log/messages file:
>>
>>
>> Nov 13 22:26:54 frank kernel: divide error: 0000 [#1]
>> Nov 13 22:26:54 frank kernel: SMP
>> Nov 13 22:26:54 frank kernel: last sysfs file: /block/drbd0/range
>> Nov 13 22:26:54 frank kernel: Modules linked in: drbd xt_tcpudp xt_pkttype
>> ipt_LOG xt_limit snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device nfs lockd
>> nfs_acl sunrpc af_packet ipt_REJECT xt_state iptable_mangle iptable_nat
>> nf_nat
>> iptable_filter nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables ip6_tables
>> x_tables tcp_bic apparmor dm_crypt loop dm_mirror dm_log dm_mod snd_intel8x0
>> snd_ac97_codec ac97_bus snd_pcm snd_timer snd i2c_sis96x soundcore
>> parport_pc
>> button sr_mod via_velocity sis_agp rtc_cmos shpchp i2c_sis630 cdrom i2c_co
>> re parport agpgart snd_page_alloc rtc_core rtc_lib pci_hotplug crc_ccitt sg
>> usbhid hid ff_memless ehci_hcd sd_mod ohci_hcd usbcore piix sis5513 ide_core
>> edd ext3 mbcache jbd fan pata_sis libata scsi_mod thermal processor
>> Nov 13 22:26:54 frank kernel: CPU:    0
>> Nov 13 22:26:54 frank kernel: EIP:    0060:[<c0266de0>]    Tainted: G      N
>> VLI
>> Nov 13 22:26:54 frank kernel: EFLAGS: 00200287   (2.6.22.12-0.1-default #1)
>> Nov 13 22:26:54 frank kernel: EIP is at sys_socketcall+0x21/0x261
>> Nov 13 22:26:54 frank kernel: eax: 00000001   ebx: 0000000c   ecx: 00000001  
>> edx: ffffffea
>> Nov 13 22:26:54 frank kernel: esi: bfdaa27c   edi: 00000000   ebp: ef1b8000  
>> esp: ef1b9f78
>> Nov 13 22:26:54 frank kernel: ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss:
>> 0068
>> Nov 13 22:26:54 frank kernel: Process ip (pid: 4350, ti=ef1b8000
>> task=f3d4eab0
>> task.ti=ef1b8000)
>> Nov 13 22:26:54 frank kernel: Stack: 40000003 00000000 f3d4ebd8 08073160
>> bfdaa140 ef1b9fb8 00000000 c0107e49
>> Nov 13 22:26:54 frank kernel:        bfdaa140 08073160 bfdaa27c 00000001
>> 00000001 bfdaa27c 08073184 c0104ea2
>> Nov 13 22:26:54 frank kernel:        00000001 bfdaa140 08073160 bfdaa27c
>> 08073184 bfdaa178 ffffffda 0000007b
>> Nov 13 22:26:54 frank kernel: Call Trace:
>> Nov 13 22:26:54 frank kernel:  [<c0107e49>] do_syscall_trace+0x12c/0x173
>> Nov 13 22:26:54 frank kernel:  [<c0104ea2>] syscall_call+0x7/0xb
>> Nov 13 22:26:54 frank kernel:  =======================
>> Nov 13 22:26:54 frank kernel: Code: c4 94 00 00 00 5b 5e 5f 5d c3 57 ba ea
>> ff
>> ff ff 56 53 83 ec 30 8b 44 24 40 8d 78 ff 83 ff 10 0f 87
>>  3d 02 00 00 8a 98 68 32 2e c0 <8d> 74 24 18 8b 54 24 44 89 f0 0f b6 cb e8
>>  2a
>> 9b f6 ff ba f2 ff
>> Nov 13 22:26:54 frank kernel: EIP: [<c0266de0>] sys_socketcall+0x21/0x261
>> SS:ESP 0068:ef1b9f78
>>
>>
> 
> hm, I see no divide instruction near the start of 2.6.22's
> sys_socketcall().  I'm wondering if some patch which opensuse has added is
> causing this.  If you have the source handy can you show us what it looks
> like?
> That's net/socket.c, the 50-odd lines after
> 
> asmlinkage long sys_socketcall(int call, unsigned long __user *args)
> 
> 
> What caused the kernel taint, btw?

Taint N is a SUSE patch for "unsupported module loaded".

Comment 3 Anonymous Emailer 2007-11-14 05:53:11 UTC

Reply-To: jnelson@jamponi.net

The only divide operation I see is contained herein, but for
completeness I include the entire function.


/*
 *  System call vectors.
 *
 *  Argument checking cleaned up. Saved 20% in size.
 *  This function doesn't need to set the kernel lock because
 *  it is set by the callees.
 */

asmlinkage long sys_socketcall(int call, unsigned long __user *args)
{
    unsigned long a[6];
    unsigned long a0, a1;
    int err;

    if (call < 1 || call > SYS_RECVMSG)
        return -EINVAL;

    /* copy_from_user should be SMP safe. */
    if (copy_from_user(a, args, nargs[call]))
        return -EFAULT;

    err = audit_socketcall(nargs[call] / sizeof(unsigned long), a);
    if (err)
        return err;

    a0 = a[0];
    a1 = a[1];

    switch (call) {
    case SYS_SOCKET:
        err = sys_socket(a0, a1, a[2]);
        break;
    case SYS_BIND:
        err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
        break;
    case SYS_CONNECT:
        err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
        break;
    case SYS_LISTEN:
        err = sys_listen(a0, a1);
        break;
    case SYS_ACCEPT:
        err =
            sys_accept(a0, (struct sockaddr __user *)a1,
                   (int __user *)a[2]);
        break;
    case SYS_GETSOCKNAME:
        err =
            sys_getsockname(a0, (struct sockaddr __user *)a1,
                    (int __user *)a[2]);
        break;
    case SYS_GETPEERNAME:
        err =
            sys_getpeername(a0, (struct sockaddr __user *)a1,
                    (int __user *)a[2]);
        break;
    case SYS_SOCKETPAIR:
        err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
        break;
    case SYS_SEND:
        err = sys_send(a0, (void __user *)a1, a[2], a[3]);
        break;
    case SYS_SENDTO:
        err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
                (struct sockaddr __user *)a[4], a[5]);
        break;
    case SYS_RECV:
        err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
        break;
    case SYS_RECVFROM:
        err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
                   (struct sockaddr __user *)a[4],
                   (int __user *)a[5]);
        break;
    case SYS_SHUTDOWN:
        err = sys_shutdown(a0, a1);
        break;
    case SYS_SETSOCKOPT:
        err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
        break;
    case SYS_GETSOCKOPT:
        err =
            sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
                   (int __user *)a[4]);
        break;
    case SYS_SENDMSG:
        err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
        break;
    case SYS_RECVMSG:
        err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
        break;
    default:
        err = -EINVAL;
        break;
    }
    return err;
}




On 11/13/07, bugme-daemon@bugzilla.kernel.org
<bugme-daemon@bugzilla.kernel.org> wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=9375
>
>
>
>
>
> ------- Comment #2 from randy.dunlap@oracle.com  2007-11-13 21:27 -------
> bugme-daemon@bugzilla.kernel.org wrote:
> > http://bugzilla.kernel.org/show_bug.cgi?id=9375
> >
> >
> >
> >
> >
> > ------- Comment #1 from anonymous@kernel-bugs.osdl.org  2007-11-13 21:19
> -------
> > Reply-To: akpm@linux-foundation.org
> >
> >
> > (plesae respond via emailed reply-to-all)
> >
> > On Tue, 13 Nov 2007 20:48:44 -0800 (PST) bugme-daemon@bugzilla.kernel.org
> > wrote:
> >
> >> http://bugzilla.kernel.org/show_bug.cgi?id=9375
> >>
> >>            Summary: divide error: 0000 [#1] with VIA Velocity when
> unplugged
> >>            Product: Other
> >>            Version: 2.5
> >>      KernelVersion: 2.6.22.12 (openSUSE 10.3)
> >>           Platform: All
> >>         OS/Version: Linux
> >>               Tree: Mainline
> >>             Status: NEW
> >>           Severity: normal
> >>           Priority: P1
> >>          Component: Other
> >>         AssignedTo: other_other@kernel-bugs.osdl.org
> >>         ReportedBy: jnelson-kernel-bugzilla@jamponi.net
> >>
> >>
> >> Most recent kernel where this bug did not occur: I've never seen it
> before.
> >> Distribution: openSUSE 10.3
> >> Hardware Environment: AMD Athlon 2200+
> >> Software Environment: openSUSE 10.3
> >> Problem Description: I unplugged my VIA Velocity and plugged it back into
> a
> >> switch and shortly thereafter it gacked.
> >>
> >> I ran 'ip -s -s link show dev eth1' which sigsegd (this machine has been
> rock
> >> solid for YEARS so I know it's not the hardware) and the machine locked
> up. The
> >> blinkenlights on the switch continued to blink but according to tcpdump no
> >> traffic was flowing from this machine. A reboot later confirmed a problem
> and I
> >> found this in the /var/log/messages file:
> >>
> >>
> >> Nov 13 22:26:54 frank kernel: divide error: 0000 [#1]
> >> Nov 13 22:26:54 frank kernel: SMP
> >> Nov 13 22:26:54 frank kernel: last sysfs file: /block/drbd0/range
> >> Nov 13 22:26:54 frank kernel: Modules linked in: drbd xt_tcpudp xt_pkttype
> >> ipt_LOG xt_limit snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device nfs
> lockd
> >> nfs_acl sunrpc af_packet ipt_REJECT xt_state iptable_mangle iptable_nat
> nf_nat
> >> iptable_filter nf_conntrack_ipv4 nf_conntrack nfnetlink ip_tables
> ip6_tables
> >> x_tables tcp_bic apparmor dm_crypt loop dm_mirror dm_log dm_mod
> snd_intel8x0
> >> snd_ac97_codec ac97_bus snd_pcm snd_timer snd i2c_sis96x soundcore
> parport_pc
> >> button sr_mod via_velocity sis_agp rtc_cmos shpchp i2c_sis630 cdrom i2c_co
> >> re parport agpgart snd_page_alloc rtc_core rtc_lib pci_hotplug crc_ccitt
> sg
> >> usbhid hid ff_memless ehci_hcd sd_mod ohci_hcd usbcore piix sis5513
> ide_core
> >> edd ext3 mbcache jbd fan pata_sis libata scsi_mod thermal processor
> >> Nov 13 22:26:54 frank kernel: CPU:    0
> >> Nov 13 22:26:54 frank kernel: EIP:    0060:[<c0266de0>]    Tainted: G     
> N
> >> VLI
> >> Nov 13 22:26:54 frank kernel: EFLAGS: 00200287   (2.6.22.12-0.1-default
> #1)
> >> Nov 13 22:26:54 frank kernel: EIP is at sys_socketcall+0x21/0x261
> >> Nov 13 22:26:54 frank kernel: eax: 00000001   ebx: 0000000c   ecx:
> 00000001
> >> edx: ffffffea
> >> Nov 13 22:26:54 frank kernel: esi: bfdaa27c   edi: 00000000   ebp:
> ef1b8000
> >> esp: ef1b9f78
> >> Nov 13 22:26:54 frank kernel: ds: 007b   es: 007b   fs: 00d8  gs: 0033 
> ss:
> >> 0068
> >> Nov 13 22:26:54 frank kernel: Process ip (pid: 4350, ti=ef1b8000
> task=f3d4eab0
> >> task.ti=ef1b8000)
> >> Nov 13 22:26:54 frank kernel: Stack: 40000003 00000000 f3d4ebd8 08073160
> >> bfdaa140 ef1b9fb8 00000000 c0107e49
> >> Nov 13 22:26:54 frank kernel:        bfdaa140 08073160 bfdaa27c 00000001
> >> 00000001 bfdaa27c 08073184 c0104ea2
> >> Nov 13 22:26:54 frank kernel:        00000001 bfdaa140 08073160 bfdaa27c
> >> 08073184 bfdaa178 ffffffda 0000007b
> >> Nov 13 22:26:54 frank kernel: Call Trace:
> >> Nov 13 22:26:54 frank kernel:  [<c0107e49>] do_syscall_trace+0x12c/0x173
> >> Nov 13 22:26:54 frank kernel:  [<c0104ea2>] syscall_call+0x7/0xb
> >> Nov 13 22:26:54 frank kernel:  =======================
> >> Nov 13 22:26:54 frank kernel: Code: c4 94 00 00 00 5b 5e 5f 5d c3 57 ba ea
> ff
> >> ff ff 56 53 83 ec 30 8b 44 24 40 8d 78 ff 83 ff 10 0f 87
> >>  3d 02 00 00 8a 98 68 32 2e c0 <8d> 74 24 18 8b 54 24 44 89 f0 0f b6 cb e8
> 2a
> >> 9b f6 ff ba f2 ff
> >> Nov 13 22:26:54 frank kernel: EIP: [<c0266de0>] sys_socketcall+0x21/0x261
> >> SS:ESP 0068:ef1b9f78
> >>
> >>
> >
> > hm, I see no divide instruction near the start of 2.6.22's
> > sys_socketcall().  I'm wondering if some patch which opensuse has added is
> > causing this.  If you have the source handy can you show us what it looks
> like?
> > That's net/socket.c, the 50-odd lines after
> >
> > asmlinkage long sys_socketcall(int call, unsigned long __user *args)
> >
> >
> > What caused the kernel taint, btw?
>
> Taint N is a SUSE patch for "unsupported module loaded".
>
>
> --
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Comment 4 Ingo Molnar 2007-11-30 06:26:52 UTC

the faulting instruction:

  <8d> 74 24 18

is a lea 0x18(%esp),%esi. Such an instruction cannot cause a divide error exception.

my guesses are: hw flakiness, attempted rootkit install or unsupported module doing weird stuff. I'm closing this as non-reproducible, unless someone can reproduce it with an untainted kernel.