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Subject[2.6.28] BUG: unable to handle kernel NULL pointer dereference at 00000010
Hi,

Was able to trigger the following:
[ 812.572406] FDC 0 is a post-1991 82077
[ 812.587464] work still pending
[ 812.593304] BUG: unable to handle kernel NULL pointer dereference at 00000010
[ 812.593443] IP: [<c01f8633>] elv_next_request+0x1ba/0x1cd
[ 812.593542] *pde = 00000000
[ 812.593635] Oops: 0000 [#1] SMP
[ 812.593756] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/idVendor
[ 812.593827] Modules linked in: snd_intel8x0(+) battery thermal processor loop container ata_generic pcspkr i2c_i801 uhci_hcd(-) i2c_core dm_snapshot ac ehci_hcd rng_core snd_ac97_codec ide_cd_mod shpchp dm_mirror dm_region_hash parport_pc pci_hotplug evdev parport cdrom libata scsi_mod dm_log thermal_sys snd_pcm snd_timer ac97_bus snd_page_alloc snd soundcore hid_dell hid_pl hid_cypress hid_zpff hid_gyration hid_bright hid_sony hid_samsung hid_microsoft hid_tmff hid_monterey hid_ezkey hid_apple hid_a4tech hid_logitech ff_memless hid_cherry hid_sunplus hid_petalynx hid_belkin hid_chicony usbhid hid netconsole ipv6 intel_agp agpgart ext3 jbd mbcache dm_mod ide_generic ide_gd_mod piix ide_core e1000 usbcore [last unloaded: floppy]
[ 812.596668]
[ 812.596718] Pid: 10, comm: events/1 Not tainted (2.6.28 #1) 808736G
[ 812.596777] EIP: 0060:[<c01f8633>] EFLAGS: 00010046 CPU: 1
[ 812.596838] EIP is at elv_next_request+0x1ba/0x1cd
[ 812.596894] EAX: dd63ccc0 EBX: de89981c ECX: 00000000 EDX: 00000000
[ 812.596951] ESI: de899834 EDI: dd63ccc0 EBP: db078f04 ESP: db078ef0
[ 812.597007] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 812.597007] Process events/1 (pid: 10, ti=db078000 task=db096520 task.ti=db078000)
[ 812.597007] Stack:
[ 812.597007] 00000000 00000002 de89981c de899834 db02d600 db078f60 de89292c db078f34
[ 812.597007] c01264b7 00000000 00000002 00000000 c012646e 00000046 db02d610 db02d624
[ 812.597007] 00000246 db078f90 db02d600 db078f60 00000246 00000000 00000002 00000000
[ 812.597007] Call Trace:
[ 812.597007] [<c01264b7>] ? finish_task_switch+0x49/0xbe
[ 812.597007] [<c012646e>] ? finish_task_switch+0x0/0xbe
[ 812.597007] [<c0138568>] ? run_workqueue+0xd7/0x1a5
[ 812.597007] [<c0138523>] ? run_workqueue+0x92/0x1a5
[ 812.597007] [<c0147b67>] ? trace_hardirqs_on+0xb/0xd
[ 812.597007] [<c01386ed>] ? worker_thread+0xb7/0xc3
[ 812.597007] [<c013b7ab>] ? autoremove_wake_function+0x0/0x33
[ 812.597007] [<c0138636>] ? worker_thread+0x0/0xc3
[ 812.597007] [<c013b531>] ? kthread+0x3b/0x61
[ 812.597007] [<c013b4f6>] ? kthread+0x0/0x61
[ 812.597007] [<c01048e3>] ? kernel_thread_helper+0x7/0x10
[ 812.597007] Code: f0 8d 55 f0 89 f8 e8 e9 38 00 00 85 c0 74 0d 8b 5d f0 85 db 0f 85 67 fe ff ff eb 18 8b 07 39 f8 75 dc 8b 47 0c 31 d2 8b 08 89 f8 <ff> 51 10 85 c0 75 ea 31 db 8d 65 f4 89 d8 5b 5e 5f 5d c3 55 89
[ 812.597007] EIP: [<c01f8633>] elv_next_request+0x1ba/0x1cd SS:ESP 0068:db078ef0
[ 812.597007] ---[ end trace 965a3d81f81574b8 ]---

On a p4 with ht, ide disk and 512mb of ram.


Folkert van Heusden

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