BUG: unable to handle kernel NULL pointer dereference
From: Zdenek Kabelac
Date: Wed May 21 2008 - 08:56:24 EST
Hello
This oops was generated while I've been playing with the vgchange -ay command.
The previous warning were made by suspend
WARNING: at drivers/base/power/main.c:77 device_pm_add+0x96/0x120()
Thus I'm only pasting the oops itself - looks quite wierd:
(my setup is 64bit T61 2GB - git commit:
8033c6e9736c29cce5f0d0abbca9a44dffb20c39 )
BUG: unable to handle kernel NULL pointer dereference at 0000000000000038
IP: [__pollwait+78/272] __pollwait+0x4e/0x110
PGD 55634067 PUD 5c37e067 PMD 0
Oops: 0002 [1] PREEMPT SMP DEBUG_PAGEALLOC
CPU 1
Modules linked in: tun nls_iso8859_2 nls_cp852 vfat fat mmc_block i915
drm ipt_MASQUERADE iptable_nat nf_nat bridge llc nfsd lockd nfs_acl
auth_rpcgss exportfs autofs4 sunrpc ipt_REJECT xt_tcpudp
nf_conntrack_ipv4 xt_state nf_conntrack iptable_filter ip_tables
x_tables binfmt_misc dm_mirror dm_log dm_mod uinput kvm_intel kvm arc4
snd_hda_intel ecb crypto_blkcipher snd_seq_oss snd_seq_midi_event
snd_seq cryptomgr snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm
crypto_algapi iwl3945 video thinkpad_acpi snd_timer sdhci mac80211 snd
mmc_core evdev psmouse soundcore backlight cfg80211 e1000e battery ac
usbhid rtc_cmos hid iTCO_wdt iTCO_vendor_support snd_page_alloc
led_class rtc_core serio_raw i2c_i801 i2c_core sr_mod cdrom intel_agp
output button nvram rtc_lib uhci_hcd ohci_hcd ehci_hcd usbcore [last
unloaded: microcode]
Pid: 4963, comm: gnome-terminal Tainted: G W 2.6.26-rc3 #5
RIP: 0010:[__pollwait+78/272] [__pollwait+78/272] __pollwait+0x4e/0x110
RSP: 0018:ffff8100555ebae8 EFLAGS: 00010206
RAX: ffff810000b01000 RBX: ffff810000b00000 RCX: ffff810000b00000
RDX: 0000000000000038 RSI: 0000000000000070 RDI: ffff810040d8b500
RBP: ffff8100555ebb08 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8100555ebbb8
R13: ffff810040d8b500 R14: ffff810059049bc8 R15: ffff8100555ebbb8
FS: 00007f5a491c27a0(0000) GS:ffff81007e024320(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000038 CR3: 0000000055618000 CR4: 0000000000002660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process gnome-terminal (pid: 4963, threadinfo ffff8100555ea000, task
ffff8100555d0000)
Stack: ffff8100555ebbb8 ffff8100590498d8 ffff810059049801 ffff810040d8b500
ffff8100555ebb38 ffffffff811e4ac8 0000000000000000 ffff810040d8b500
ffff8100590498d8 ffff8100590498f8 ffff8100555ebb78 ffffffff811e11f1
Call Trace:
[normal_poll+88/400] normal_poll+0x58/0x190
[tty_poll+129/144] tty_poll+0x81/0x90
[do_sys_poll+500/1104] do_sys_poll+0x1f4/0x450
[__pollwait+0/272] ? __pollwait+0x0/0x110
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[lockdep_sys_exit_thunk+53/103] ? lockdep_sys_exit_thunk+0x35/0x67
[sys_poll+51/160] sys_poll+0x33/0xa0
[system_call_after_swapgs+123/128] system_call_after_swapgs+0x7b/0x80
Code: f6 49 89 d4 48 8b 5a 08 83 f9 09 77 68 48 63 c1 48 6b c0 38 48
8d 54 02 18 8d 41 01 41 89 44 24 14 48 85 d2 74 34 f0 41 ff 45 28 <4c>
89 2a 4c 89 72 30 48 8d 72 08 4c 89 f7 65 48 8b 04 25 00 00
RIP [__pollwait+78/272] __pollwait+0x4e/0x110
RSP <ffff8100555ebae8>
CR2: 0000000000000038
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
IP: [<0000000000000000>]
PGD 34bc2067 PUD 40eee067 PMD 0
Oops: 0010 [2] PREEMPT SMP DEBUG_PAGEALLOC
CPU 1
Modules linked in: tun nls_iso8859_2 nls_cp852 vfat fat mmc_block i915
drm ipt_MASQUERADE iptable_nat nf_nat bridge llc nfsd lockd nfs_acl
auth_rpcgss exportfs autofs4 sunrpc ipt_REJECT xt_tcpudp
nf_conntrack_ipv4 xt_state nf_conntrack iptable_filter ip_tables
x_tables binfmt_misc dm_mirror dm_log dm_mod uinput kvm_intel kvm arc4
snd_hda_intel ecb crypto_blkcipher snd_seq_oss snd_seq_midi_event
snd_seq cryptomgr snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm
crypto_algapi iwl3945 video thinkpad_acpi snd_timer sdhci mac80211 snd
mmc_core evdev psmouse soundcore backlight cfg80211 e1000e battery ac
usbhid rtc_cmos hid iTCO_wdt iTCO_vendor_support snd_page_alloc
led_class rtc_core serio_raw i2c_i801 i2c_core sr_mod cdrom intel_agp
output button nvram rtc_lib uhci_hcd ohci_hcd ehci_hcd usbcore [last
unloaded: microcode]
Pid: 11408, comm: rsyslogd Tainted: G D W 2.6.26-rc3 #5
RIP: 0010:[<0000000000000000>] [<0000000000000000>]
RSP: 0018:ffff810021193c30 EFLAGS: 00010006
RAX: ffff810000b002d0 RBX: ffffffffffffffe8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff810000b002b8
RBP: ffff810021193c68 R08: ffff810000b002b8 R09: 0000000000000001
R10: ffff8100593e8000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000001 R14: ffff8100716ff760 R15: 0000000000000000
FS: 0000000041bc5950(0063) GS:ffff81007e024320(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 00000000616ff000 CR4: 0000000000002660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process rsyslogd (pid: 11408, threadinfo ffff810021192000, task
ffff8100593e8000)
Stack: ffffffff8102c51a 0000000100000000 ffff8100716ff728 0000000000000000
0000000000000001 0000000000000286 0000000000000001 ffff810021193ca8
ffffffff8102e8a3 0000000000000286 0000000000000000 0000000000000f7c
Call Trace:
[__wake_up_common+90/144] ? __wake_up_common+0x5a/0x90
[kvm:__wake_up+67/16688] __wake_up+0x43/0x70
[n_tty_receive_buf+1618/4592] n_tty_receive_buf+0x652/0x11f0
[tty_open+632/896] ? tty_open+0x278/0x380
[dm_mod:unlock_kernel+54/192] ? unlock_kernel+0x36/0x70
[chrdev_open+329/544] ? chrdev_open+0x149/0x220
[dm_mod:add_wait_queue+34/80] ? add_wait_queue+0x22/0x50
[dm_mod:add_wait_queue+34/80] ? add_wait_queue+0x22/0x50
[pty_write+58/96] pty_write+0x3a/0x60
[write_chan+867/1040] write_chan+0x363/0x410
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[tty_write+444/640] tty_write+0x1bc/0x280
[write_chan+0/1040] ? write_chan+0x0/0x410
[vfs_write+203/400] vfs_write+0xcb/0x190
[sys_write+80/144] sys_write+0x50/0x90
[system_call_after_swapgs+123/128] system_call_after_swapgs+0x7b/0x80
Code: Bad RIP value.
RIP [<0000000000000000>]
RSP <ffff810021193c30>
CR2: 0000000000000000
---[ end trace ba14c632f0d682f2 ]---
note: rsyslogd[11408] exited with preempt_count 1
BUG: sleeping function called from invalid context at kernel/rwsem.c:21
in_atomic():1, irqs_disabled():1
INFO: lockdep is turned off.
irq event stamp: 0
hardirqs last enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [copy_process+1068/5328]
copy_process+0x42c/0x14d0
softirqs last enabled at (0): [copy_process+1068/5328]
copy_process+0x42c/0x14d0
softirqs last disabled at (0): [<0000000000000000>] 0x0
Pid: 11408, comm: rsyslogd Tainted: G D W 2.6.26-rc3 #5
Call Trace:
[print_irqtrace_events+272/288] ? print_irqtrace_events+0x110/0x120
[kvm:__might_sleep+236/2512] __might_sleep+0xec/0x130
[snd_pcm:down_read+32/5184] down_read+0x20/0x70
[acct_collect+68/496] acct_collect+0x44/0x1f0
[do_exit+420/2224] do_exit+0x1a4/0x8b0
[do_unblank_screen+31/368] ? do_unblank_screen+0x1f/0x170
[oops_end+136/144] oops_end+0x88/0x90
[do_page_fault+640/2800] do_page_fault+0x280/0xaf0
[__up_read+130/176] ? __up_read+0x82/0xb0
[__d_lookup+177/352] ? __d_lookup+0xb1/0x160
[__d_lookup+215/352] ? __d_lookup+0xd7/0x160
[error_exit+0/169] error_exit+0x0/0xa9
[__wake_up_common+90/144] ? __wake_up_common+0x5a/0x90
[kvm:__wake_up+67/16688] ? __wake_up+0x43/0x70
[n_tty_receive_buf+1618/4592] ? n_tty_receive_buf+0x652/0x11f0
[tty_open+632/896] ? tty_open+0x278/0x380
[dm_mod:unlock_kernel+54/192] ? unlock_kernel+0x36/0x70
[chrdev_open+329/544] ? chrdev_open+0x149/0x220
[dm_mod:add_wait_queue+34/80] ? add_wait_queue+0x22/0x50
[dm_mod:add_wait_queue+34/80] ? add_wait_queue+0x22/0x50
[pty_write+58/96] ? pty_write+0x3a/0x60
[write_chan+867/1040] ? write_chan+0x363/0x410
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[tty_write+444/640] ? tty_write+0x1bc/0x280
[write_chan+0/1040] ? write_chan+0x0/0x410
[vfs_write+203/400] ? vfs_write+0xcb/0x190
[sys_write+80/144] ? sys_write+0x50/0x90
[system_call_after_swapgs+123/128] ? system_call_after_swapgs+0x7b/0x80
SPIN IRQ ALREADY DISABLED
Pid: 11408, comm: rsyslogd Tainted: G D W 2.6.26-rc3 #5
Call Trace:
[dm_mirror:_spin_lock_irq+126/128] _spin_lock_irq+0x7e/0x80
[__pagevec_lru_add_active+99/240] __pagevec_lru_add_active+0x63/0xf0
[drain_cpu_pagevecs+133/192] drain_cpu_pagevecs+0x85/0xc0
[lru_add_drain+26/80] lru_add_drain+0x1a/0x50
[exit_mmap+32/320] exit_mmap+0x20/0x140
[mmput+87/192] mmput+0x57/0xc0
[exit_mm+155/272] exit_mm+0x9b/0x110
[do_exit+501/2224] do_exit+0x1f5/0x8b0
[do_unblank_screen+31/368] ? do_unblank_screen+0x1f/0x170
[oops_end+136/144] oops_end+0x88/0x90
[do_page_fault+640/2800] do_page_fault+0x280/0xaf0
[__up_read+130/176] ? __up_read+0x82/0xb0
[__d_lookup+177/352] ? __d_lookup+0xb1/0x160
[__d_lookup+215/352] ? __d_lookup+0xd7/0x160
[error_exit+0/169] error_exit+0x0/0xa9
[__wake_up_common+90/144] ? __wake_up_common+0x5a/0x90
[kvm:__wake_up+67/16688] ? __wake_up+0x43/0x70
[n_tty_receive_buf+1618/4592] ? n_tty_receive_buf+0x652/0x11f0
[tty_open+632/896] ? tty_open+0x278/0x380
[dm_mod:unlock_kernel+54/192] ? unlock_kernel+0x36/0x70
[chrdev_open+329/544] ? chrdev_open+0x149/0x220
[dm_mod:add_wait_queue+34/80] ? add_wait_queue+0x22/0x50
[dm_mod:add_wait_queue+34/80] ? add_wait_queue+0x22/0x50
[pty_write+58/96] ? pty_write+0x3a/0x60
[write_chan+867/1040] ? write_chan+0x363/0x410
[<ffffffff81033360>] ? default_wake_function+0x0/0x10
[tty_write+444/640] ? tty_write+0x1bc/0x280
[write_chan+0/1040] ? write_chan+0x0/0x410
[vfs_write+203/400] ? vfs_write+0xcb/0x190
[sys_write+80/144] ? sys_write+0x50/0x90
[system_call_after_swapgs+123/128] ? system_call_after_swapgs+0x7b/0x80
---[ end trace ba14c632f0d682f2 ]---
Here is the actual code: (part of the __pollwait - address 0x171e)
static struct poll_table_entry *poll_get_entry(poll_table *_p)
{
struct poll_wqueues *p = container_of(_p, struct poll_wqueues, pt);
struct poll_table_page *table = p->table;
16f7: 48 8b 5a 08 mov 0x8(%rdx),%rbx
if (p->inline_index < N_INLINE_POLL_ENTRIES)
16fb: 83 f9 09 cmp $0x9,%ecx
16fe: 77 68 ja 1768 <__pollwait+0x98>
return p->inline_entries + p->inline_index++;
1700: 48 63 c1 movslq %ecx,%rax
1703: 48 6b c0 38 imul $0x38,%rax,%rax
1707: 48 8d 54 02 18 lea 0x18(%rdx,%rax,1),%rdx
170c: 8d 41 01 lea 0x1(%rcx),%eax
170f: 41 89 44 24 14 mov %eax,0x14(%r12)
/* Add a new entry */
static void __pollwait(struct file *filp, wait_queue_head_t *wait_address,
poll_table *p)
{
struct poll_table_entry *entry = poll_get_entry(p);
if (!entry)
1714: 48 85 d2 test %rdx,%rdx
1717: 74 34 je 174d <__pollwait+0x7d>
*
* Atomically increments @v by 1.
*/
static inline void atomic_inc(atomic_t *v)
{
asm volatile(LOCK_PREFIX "incl %0"
1719: f0 41 ff 45 28 lock incl 0x28(%r13)
return;
get_file(filp);
entry->filp = filp;
171e: 4c 89 2a mov %r13,(%rdx)
entry->wait_address = wait_address;
1721: 4c 89 72 30 mov %r14,0x30(%rdx)
init_waitqueue_entry(&entry->wait, current);
add_wait_queue(wait_address, &entry->wait);
1725: 48 8d 72 08 lea 0x8(%rdx),%rsi
1729: 4c 89 f7 mov %r14,%rdi
#include <asm/pda.h>
static inline struct task_struct *get_current(void)
{
struct task_struct *t = read_pda(pcurrent);
172c: 65 48 8b 04 25 00 00 mov %gs:0x0,%rax
1733: 00 00
# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) DECLARE_WAIT_QUEUE_HEAD(name)
#endif
--
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