Bug#665413: BUG: unable to handle kernel paging request in mark_files_ro

[Jonathan Nieder <jrnieder@gmail.com>]

Daniel Kahn Gillmor wrote:

> less than 10 minutes after booting to 2.6.32-5-486 on an HP d530 SFF
> workstation (model DG784A) with 4GiB of RAM, i got this kernel BUG and
> then panic:

Thanks.

> [  574.852044] BUG: unable to handle kernel paging request at b4777dbf
> [  574.856011] IP: [<c109520e>] mark_files_ro+0x27/0x6f
> [  574.856011] *pde = 00000000 
> [  574.856011] Oops: 0002 [#1] 
> [  574.856011] last sysfs file: /sys/devices/virtual/block/md0/md/metadata_version
> [  574.856011] Modules linked in: ext3 jbd mbcache raid1 md_mod dm_crypt dm_mod pl2303 usbserial sd_mod crc_t10dif ata_generic i915 tg3 3c59x drm_kms_helper tulip mii libphy uhci_hcd drm i2c_algo_bit snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer i2c_i801 ata_piix snd soundcore shpchp parport_pc button processor thermal parport libata i2c_core ehci_hcd rng_core snd_page_alloc evdev psmouse serio_raw pcspkr scsi_mod pci_hotplug usbcore nls_base video thermal_sys output
> [  574.856011] 
> [  574.856011] Pid: 6349, comm: dpkg-deb Not tainted (2.6.32-5-486 #1) HP d530 SFF(DG784A)
[...]
> [  574.856011] Call Trace:
> [  574.856011]  [<c105b8ef>] ? __rcu_process_callbacks+0x292/0x352
> [  574.856011]  [<c105b9be>] ? rcu_process_callbacks+0xf/0x1f
> [  574.856011]  [<c1026dfa>] ? __do_softirq+0x8e/0x135
> [  574.856011]  [<c1026ed1>] ? do_softirq+0x30/0x3b
> [  574.856011]  [<c1026f94>] ? irq_exit+0x25/0x53
> [  574.856011]  [<c100e963>] ? smp_apic_timer_interrupt+0x60/0x68
> [  574.856011]  [<c10037f1>] ? apic_timer_interrupt+0x31/0x40
> [  574.856011] Code: f0 00 00 c3 57 56 89 c6 53 8d 78 74 8b 56 74 eb 54 8b 42 0c 8b 40 0c 0f b7 40 6e 25 00 f0 00 00 3d 00 80 00 00 75 3c 8b 42 14 85 <c0> 74 35 8b 42 1c a8 02 74 2e 8b 5a 08 83 e0 fd 89 42 1c 85 db 

Is this reproducible?  Is the IP and backtrace the same each time?