Ubuntu
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BUG: unable to handle kernel NULL pointer dereference at 0000005a

Asked by horst hummel

Hi,

I am not sure whether to add this as a bug report. Recently ubuntu has freezed sometimes and I cannot do anything except the hard(!) shutdown. (Btw: I use the hard shutdown quite often after having unpluged an external monitor and reboot; it seems that after upgrading from 9.10 to 10.04 ubuntu does not realise the second screen was removed during the first boot; therefore I hard shutdown, restart and it works. Moreover the ctr+alt+bksp usually does not have any effect). The last three times the freeze happened was when using skype 2.1.0.81-1ubuntu5, firefox 3.6.13+build3+nobinonly-0ubuntu0.10.04.1 and maybe gnome-terminal2.30.2-0ubuntu1 (with some ssh conn.).

So I had a log in /var/log/kern.log today, and it seem that at that times, when it freezed, there was following bug in the kernel:
BUG: unable to handle kernel NULL pointer dereference at 0000005a

Following there are the snapshot of the two of those bugs. I dont want to spam this report, but if necessary I can also upload the whole kern.log

Does anyone understand what the problem is or if this is worth a bug report?

Thanks a lot
Horst

FIRST:

14662 Jan 26 21:07:21 kernel: [ 123.504042] Clocksource tsc unstable (delta = -137538529 ns)
14663 Jan 26 21:08:54 kernel: [ 216.059659] ndiswrapper (iw_set_auth:1602): invalid cmd 12
14664 Jan 26 21:08:55 kernel: [ 217.849838] CE: hpet increasing min_delta_ns to 15000 nsec
14665 Jan 26 22:33:54 kernel: [ 5316.058207] ndiswrapper (iw_set_auth:1602): invalid cmd 12
14666 Jan 26 22:35:54 kernel: [ 5436.059177] ndiswrapper (iw_set_auth:1602): invalid cmd 12
14667 Jan 26 22:35:54 kernel: [ 5436.796176] BUG: unable to handle kernel NULL pointer dereference at 0000005a
14668 Jan 26 22:35:54 kernel: [ 5436.796197] IP: [<f98f3905>] 0xf98f3905
14669 Jan 26 22:35:54 kernel: [ 5436.796218] *pde = bb613067
14670 Jan 26 22:35:54 kernel: [ 5436.796226] Oops: 0000 [#1] SMP
14671 Jan 26 22:35:54 kernel: [ 5436.796235] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/voltage_now
14672 Jan 26 22:35:54 kernel: [ 5436.796245] Modules linked in: binfmt_misc rfcomm ppdev sco bridge stp bnep l2cap nls_iso8859_1 nls_cp437 vfat fat snd_hda_
14673 Jan 26 22:35:54 kernel: [ 5436.796342]
14674 Jan 26 22:35:54 kernel: [ 5436.796353] Pid: 714, comm: ntos_wq Tainted: P (2.6.32-27-generic #49-Ubuntu) HP Pavilion tx2000 Notebook PC
14675 Jan 26 22:35:54 kernel: [ 5436.796363] EIP: 0060:[<f98f3905>] EFLAGS: 00010246 CPU: 0
14676 Jan 26 22:35:54 kernel: [ 5436.796371] EIP is at 0xf98f3905
14677 Jan 26 22:35:54 kernel: [ 5436.796376] EAX: 00000000 EBX: fa7fe000 ECX: 00000000 EDX: ee114918
14678 Jan 26 22:35:54 kernel: [ 5436.796383] ESI: 00000000 EDI: 00000000 EBP: f09bdedc ESP: f09bde80
14679 Jan 26 22:35:54 kernel: [ 5436.796390] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
14680 Jan 26 22:35:54 kernel: [ 5436.796398] Process ntos_wq (pid: 714, ti=f09bc000 task=f71d72c0 task.ti=f09bc000)
14681 Jan 26 22:35:54 kernel: [ 5436.796403] Stack:
14682 Jan 26 22:35:54 kernel: [ 5436.796407] ef669800 00000002 fa7fe000 ffffffff 3ca7f7e5 0000013c 3c5c9c1c 0000013c
14683 Jan 26 22:35:54 kernel: [ 5436.796424] <0> f71d72c0 c2c08798 f71d72ec c2c08798 f09bdee8 c01481d8 3ca7f7e5 0000013c
14684 Jan 26 22:35:54 kernel: [ 5436.796441] <0> 004b5bc9 00000003 f09ae490 fa7fe000 00000002 f9928ec5 fa7fe000 f09bdef8
14685 Jan 26 22:35:54 kernel: [ 5436.796459] Call Trace:
14686 Jan 26 22:35:54 kernel: [ 5436.796478] [<c01481d8>] ? dequeue_entity+0x1c8/0x220
14687 Jan 26 22:35:54 kernel: [ 5436.796531] [<f80c47f8>] ? kdpc_worker+0xb8/0x130 [ndiswrapper]
14688 Jan 26 22:35:54 kernel: [ 5436.796549] [<c0163a8e>] ? run_workqueue+0x8e/0x150
14689 Jan 26 22:35:54 kernel: [ 5436.796582] [<f80c4740>] ? kdpc_worker+0x0/0x130 [ndiswrapper]
14690 Jan 26 22:35:54 kernel: [ 5436.796593] [<c0163bd4>] ? worker_thread+0x84/0xe0
14691 Jan 26 22:35:54 kernel: [ 5436.796605] [<c0167b50>] ? autoremove_wake_function+0x0/0x50
14692 Jan 26 22:35:54 kernel: [ 5436.796614] [<c0163b50>] ? worker_thread+0x0/0xe0
14693 Jan 26 22:35:54 kernel: [ 5436.796623] [<c01678c4>] ? kthread+0x74/0x80
14694 Jan 26 22:35:54 kernel: [ 5436.796631] [<c0167850>] ? kthread+0x0/0x80
14695 Jan 26 22:35:54 kernel: [ 5436.796642] [<c0104087>] ? kernel_thread_helper+0x7/0x10
14696 Jan 26 22:35:54 kernel: [ 5436.796647] Code: 6a 04 8d 45 fc 50 57 57 68 b2 37 8f f9 53 e8 c3 75 ff ff 0f b6 86 8a 00 00 00 57 57 50 57 6a 07 56 6a 18
14697 Jan 26 22:35:54 kernel: [ 5436.796736] EIP: [<f98f3905>] 0xf98f3905 SS:ESP 0068:f09bde80
14698 Jan 26 22:35:54 kernel: [ 5436.796751] CR2: 000000000000005a
14699 Jan 26 22:35:54 kernel: [ 5436.796760] ---[ end trace cf329ba1d0ba4771 ]---
14700 Jan 26 22:40:04 kernel: imklog 4.2.0, log source = /proc/kmsg started.
14701 Jan 26 22:40:04 kernel: [ 0.000000] Initializing cgroup subsys cpuset
14702 Jan 26 22:40:04 kernel: [ 0.000000] Initializing cgroup subsys cpu

SECOND:

 2117 Jan 24 21:22:30 kernel: [26059.071363] ndiswrapper (iw_set_auth:1602): invalid cmd 12
 2118 Jan 24 21:30:30 kernel: [26539.073708] ndiswrapper (iw_set_auth:1602): invalid cmd 12
 2119 Jan 24 21:30:30 kernel: [26539.808146] BUG: unable to handle kernel NULL pointer dereference at 0000005a
 2120 Jan 24 21:30:30 kernel: [26539.808169] IP: [<f993a905>] 0xf993a905
 2121 Jan 24 21:30:30 kernel: [26539.808188] *pde = b15ec067
 2122 Jan 24 21:30:30 kernel: [26539.808196] Oops: 0000 [#1] SMP
 2123 Jan 24 21:30:30 kernel: [26539.808206] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0/voltage_now
 2124 Jan 24 21:30:30 kernel: [26539.808216] Modules linked in: binfmt_misc rfcomm ppdev sco bridge stp bnep l2cap nls_iso8859_1 nls_cp437 vfat fat snd_hda_
 2125 Jan 24 21:30:30 kernel: [26539.808312]
 2126 Jan 24 21:30:30 kernel: [26539.808323] Pid: 672, comm: ntos_wq Tainted: P (2.6.32-27-generic #49-Ubuntu) HP Pavilion tx2000 Notebook PC
 2127 Jan 24 21:30:30 kernel: [26539.808332] EIP: 0060:[<f993a905>] EFLAGS: 00010246 CPU: 0
 2128 Jan 24 21:30:30 kernel: [26539.808340] EIP is at 0xf993a905
 2129 Jan 24 21:30:30 kernel: [26539.808345] EAX: 00000000 EBX: f99b6000 ECX: 00000000 EDX: ec123cd8
 2130 Jan 24 21:30:30 kernel: [26539.808352] ESI: 00000000 EDI: 00000000 EBP: f2e2dedc ESP: f2e2de80
 2131 Jan 24 21:30:30 kernel: [26539.808359] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
 2132 Jan 24 21:30:30 kernel: [26539.808367] Process ntos_wq (pid: 672, ti=f2e2c000 task=f39ed940 task.ti=f2e2c000)
 2133 Jan 24 21:30:30 kernel: [26539.808372] Stack:
 2134 Jan 24 21:30:30 kernel: [26539.808376] f19e2800 00000002 f99b6000 ffffffff 24ee1fc6 00000497 24a2b9d7 00000497
 2135 Jan 24 21:30:30 kernel: [26539.808392] <0> f39ed940 c2c08798 f39ed96c c2c08798 f2e2dee8 c01481d8 24ee1fc6 00000497
 2136 Jan 24 21:30:30 kernel: [26539.808409] <0> 004b65ef 00000003 f2f04490 f99b6000 00000002 f996fec5 f99b6000 f2e2def8
 2137 Jan 24 21:30:30 kernel: [26539.808427] Call Trace:
 2138 Jan 24 21:30:30 kernel: [26539.808446] [<c01481d8>] ? dequeue_entity+0x1c8/0x220
 2139 Jan 24 21:30:30 kernel: [26539.808499] [<f80c37f8>] ? kdpc_worker+0xb8/0x130 [ndiswrapper]
 2140 Jan 24 21:30:30 kernel: [26539.808516] [<c0163a8e>] ? run_workqueue+0x8e/0x150
 2141 Jan 24 21:30:30 kernel: [26539.808547] [<f80c3740>] ? kdpc_worker+0x0/0x130 [ndiswrapper]
 2142 Jan 24 21:30:30 kernel: [26539.808559] [<c0163bd4>] ? worker_thread+0x84/0xe0
 2143 Jan 24 21:30:30 kernel: [26539.808569] [<c0167b50>] ? autoremove_wake_function+0x0/0x50
 2144 Jan 24 21:30:30 kernel: [26539.808579] [<c0163b50>] ? worker_thread+0x0/0xe0
 2145 Jan 24 21:30:30 kernel: [26539.808588] [<c01678c4>] ? kthread+0x74/0x80
 2146 Jan 24 21:30:30 kernel: [26539.808596] [<c0167850>] ? kthread+0x0/0x80
 2147 Jan 24 21:30:30 kernel: [26539.808607] [<c0104087>] ? kernel_thread_helper+0x7/0x10
 2148 Jan 24 21:30:30 kernel: [26539.808612] Code: 6a 04 8d 45 fc 50 57 57 68 b2 a7 93 f9 53 e8 c3 75 ff ff 0f b6 86 8a 00 00 00 57 57 50 57 6a 07 56 6a 18
 2149 Jan 24 21:30:30 kernel: [26539.808701] EIP: [<f993a905>] 0xf993a905 SS:ESP 0068:f2e2de80
 2150 Jan 24 21:30:30 kernel: [26539.808715] CR2: 000000000000005a
 2151 Jan 24 21:30:30 kernel: [26539.808734] ---[ end trace 0e0f172a752b8dab ]---
 2152 Jan 24 21:31:37 kernel: [26606.249002] BUG: soft lockup - CPU#1 stuck for 61s! [NetworkManager:955]
 2153 Jan 24 21:31:37 kernel: [26606.249004] Modules linked in: binfmt_misc rfcomm ppdev sco bridge stp bnep l2cap nls_iso8859_1 nls_cp437 vfat fat snd_hda_
 2154 Jan 24 21:31:37 kernel: [26606.249004]
 2155 Jan 24 21:31:37 kernel: [26606.249004] Pid: 955, comm: NetworkManager Tainted: P D (2.6.32-27-generic #49-Ubuntu) HP Pavilion tx2000 Notebook
 2156 Jan 24 21:31:37 kernel: [26606.249004] EIP: 0060:[<f80be59c>] EFLAGS: 00000202 CPU: 1
 2157 Jan 24 21:31:37 kernel: [26606.249004] EIP is at NdisAcquireSpinLock+0x7c/0xb0 [ndiswrapper]
 2158 Jan 24 21:31:37 kernel: [26606.249004] EAX: 00000001 EBX: c2e0de40 ECX: f2929e08 EDX: 00000002
 2159 Jan 24 21:31:37 kernel: [26606.249004] ESI: f2f040ec EDI: f39ea640 EBP: f2929d50 ESP: f2929d44
 2160 Jan 24 21:31:37 kernel: [26606.249004] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
 2161 Jan 24 21:31:37 kernel: [26606.249004] CR0: 80050033 CR2: a7bff028 CR3: 32910000 CR4: 000006d0
 2162 Jan 24 21:31:37 kernel: [26606.249004] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
 2163 Jan 24 21:31:37 kernel: [26606.249004] DR6: ffff0ff0 DR7: 00000400
 2164 Jan 24 21:31:37 kernel: [26606.249004] Call Trace:
 2165 Jan 24 21:31:37 kernel: [26606.249004] [<c012a688>] ? default_spin_lock_flags+0x8/0x10
 2166 Jan 24 21:31:37 kernel: [26606.249004] [<c058d9bf>] ? _spin_lock_irqsave+0x2f/0x50
 2167 Jan 24 21:31:37 kernel: [26606.249004] [<f80cb85a>] ? mp_request+0x13a/0x330 [ndiswrapper]
 2168 Jan 24 21:31:37 kernel: [26606.249004] [<f80b6937>] ? get_ap_address+0x37/0x60 [ndiswrapper]
 2169 Jan 24 21:31:37 kernel: [26606.249004] [<f80b697b>] ? iw_get_ap_address+0x1b/0x40 [ndiswrapper]
 2170 Jan 24 21:31:37 kernel: [26606.249004] [<c057161d>] ? ioctl_standard_call+0x5d/0x100
 2171 Jan 24 21:31:37 kernel: [26606.249004] [<c0571a02>] ? T.784+0xc2/0x150
 2172 Jan 24 21:31:37 kernel: [26606.249004] [<f80b6960>] ? iw_get_ap_address+0x0/0x40 [ndiswrapper]
 2173 Jan 24 21:31:37 kernel: [26606.249004] [<c0571af0>] ? wext_handle_ioctl+0x60/0xc0
 2174 Jan 24 21:31:37 kernel: [26606.249004] [<c04c7364>] ? dev_ioctl+0x614/0x720
 2175 Jan 24 21:31:37 kernel: [26606.249004] [<c0239765>] ? inotify_d_instantiate+0x45/0x60
 2176 Jan 24 21:31:37 kernel: [26606.249004] [<c021abac>] ? __d_instantiate+0x9c/0xd0
 2177 Jan 24 21:31:37 kernel: [26606.249004] [<c02f6aa8>] ? security_d_instantiate+0x18/0x30
 2178 Jan 24 21:31:37 kernel: [26606.249004] [<c04b4383>] ? sock_ioctl+0x1d3/0x270
 2179 Jan 24 21:31:37 kernel: [26606.249004] [<c04b41b0>] ? sock_ioctl+0x0/0x270
 2180 Jan 24 21:31:37 kernel: [26606.249004] [<c0217211>] ? vfs_ioctl+0x21/0x90
 2181 Jan 24 21:31:37 kernel: [26606.249004] [<c02174f9>] ? do_vfs_ioctl+0x79/0x310
 2182 Jan 24 21:31:37 kernel: [26606.249004] [<c03549a9>] ? copy_to_user+0x39/0x130
 2183 Jan 24 21:31:37 kernel: [26606.249004] [<c02177f7>] ? sys_ioctl+0x67/0x80
 2184 Jan 24 21:31:37 kernel: [26606.249004] [<c01033ec>] ? syscall_call+0x7/0xb
 2185 Jan 24 21:32:42 kernel: [26671.749005] BUG: soft lockup - CPU#1 stuck for 61s! [NetworkManager:955]
 2186 Jan 24 21:32:42 kernel: [26671.749005] Modules linked in: binfmt_misc rfcomm ppdev sco bridge stp bnep l2cap nls_iso8859_1 nls_cp437 vfat fat snd_hda_
 2187 Jan 24 21:32:42 kernel: [26671.749005]
 2188 Jan 24 21:32:42 kernel: [26671.749005] Pid: 955, comm: NetworkManager Tainted: P D (2.6.32-27-generic #49-Ubuntu) HP Pavilion tx2000 Notebook
 2189 Jan 24 21:32:42 kernel: [26671.749005] EIP: 0060:[<f80be59f>] EFLAGS: 00000202 CPU: 1
 2190 Jan 24 21:32:42 kernel: [26671.749005] EIP is at NdisAcquireSpinLock+0x7f/0xb0 [ndiswrapper]
 2191 Jan 24 21:32:42 kernel: [26671.749005] EAX: 00000001 EBX: c2e0de40 ECX: f2929e08 EDX: 00000002
 2192 Jan 24 21:32:42 kernel: [26671.749005] ESI: f2f040ec EDI: f39ea640 EBP: f2929d50 ESP: f2929d44
 2193 Jan 24 21:32:42 kernel: [26671.749005] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
 2194 Jan 24 21:32:42 kernel: [26671.749005] CR0: 80050033 CR2: a7bff028 CR3: 32910000 CR4: 000006d0
 2195 Jan 24 21:32:42 kernel: [26671.749005] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
 2196 Jan 24 21:32:42 kernel: [26671.749005] DR6: ffff0ff0 DR7: 00000400
 2197 Jan 24 21:32:42 kernel: [26671.749005] Call Trace:
 2198 Jan 24 21:32:42 kernel: [26671.749005] [<c012a688>] ? default_spin_lock_flags+0x8/0x10
 2199 Jan 24 21:32:42 kernel: [26671.749005] [<c058d9bf>] ? _spin_lock_irqsave+0x2f/0x50
 2200 Jan 24 21:32:42 kernel: [26671.749005] [<f80cb85a>] ? mp_request+0x13a/0x330 [ndiswrapper]
 2201 Jan 24 21:32:42 kernel: [26671.749005] [<f80b6937>] ? get_ap_address+0x37/0x60 [ndiswrapper]
 2202 Jan 24 21:32:42 kernel: [26671.749005] [<f80b697b>] ? iw_get_ap_address+0x1b/0x40 [ndiswrapper]
 2203 Jan 24 21:32:42 kernel: [26671.749005] [<c057161d>] ? ioctl_standard_call+0x5d/0x100
 2204 Jan 24 21:32:42 kernel: [26671.749005] [<c0571a02>] ? T.784+0xc2/0x150
 2205 Jan 24 21:32:42 kernel: [26671.749005] [<f80b6960>] ? iw_get_ap_address+0x0/0x40 [ndiswrapper]
 2206 Jan 24 21:32:42 kernel: [26671.749005] [<c0571af0>] ? wext_handle_ioctl+0x60/0xc0
 2207 Jan 24 21:32:42 kernel: [26671.749005] [<c04c7364>] ? dev_ioctl+0x614/0x720
 2208 Jan 24 21:32:42 kernel: [26671.749005] [<c0239765>] ? inotify_d_instantiate+0x45/0x60
 2209 Jan 24 21:32:42 kernel: [26671.749005] [<c021abac>] ? __d_instantiate+0x9c/0xd0
 2210 Jan 24 21:32:42 kernel: [26671.749005] [<c02f6aa8>] ? security_d_instantiate+0x18/0x30
 2211 Jan 24 21:32:42 kernel: [26671.749005] [<c04b4383>] ? sock_ioctl+0x1d3/0x270
 2212 Jan 24 21:32:42 kernel: [26671.749005] [<c04b41b0>] ? sock_ioctl+0x0/0x270
 2213 Jan 24 21:32:42 kernel: [26671.749005] [<c0217211>] ? vfs_ioctl+0x21/0x90
 2214 Jan 24 21:32:42 kernel: [26671.749005] [<c02174f9>] ? do_vfs_ioctl+0x79/0x310
 2215 Jan 24 21:32:42 kernel: [26671.749005] [<c03549a9>] ? copy_to_user+0x39/0x130
 2216 Jan 24 21:32:42 kernel: [26671.749005] [<c02177f7>] ? sys_ioctl+0x67/0x80
 2217 Jan 24 21:32:42 kernel: [26671.749005] [<c01033ec>] ? syscall_call+0x7/0xb
 2218 Jan 24 21:35:22 kernel: imklog 4.2.0, log source = /proc/kmsg started.
 2219 Jan 24 21:35:23 kernel: [ 0.000000] Initializing cgroup subsys cpuset

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Eliah Kagan (degeneracypressure) said : 		#1

This is probably due to a bug. If you are willing to submit a bug report, that would help Ubuntu improve and potentially result in a fix for your problem. Before reporting a bug, please read https://help.ubuntu.com/community/ReportingBugs carefully. After you have reported the bug, you can link to it in this question by clicking the "Link existing bug" hyperlink in this question and putting in the bug number.

Can you help with this problem?

Provide an answer of your own, or ask horst hummel for more information if necessary.

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