Re: kernel panic and then oops

[P Lavin <lavin.p@redpinesignals.com>]

Hi Aaron,

 > Unable to handle kernel paging
 > request at virtual address b9e9168a

This message is comming because a page fault has occured at virtual 
address b9e9168a . This means the requested page was not available in 
the virtual memory. When i got these kind of errors in my WLAN driver 
kernel was crashing. After decoding the oops i found out that i was 
tryng to free some invalid memory !! Once i fixed this bug my module was 
working fine.
Regards,
Lavin

Aaron P. Martinez wrote:
> I am running Centos 4 with the latest kernel (updated yesterday)
> 2.6.9-5.0.5.EL on a P4 2.4 machine w/1 Gb ram and for the last couple
> weeks the machine has just been randomly hanging.  I did upgrade the
> memory from a 512m stick to 2 1 gig sticks because the machine was
> regularly using 100% of the swap and would simply crawl.  I know the
> thing to look at here obviously is the memory but i've already run
> memtest86+ and it reported that there was nothing wrong with the memory.
> I have tried running with a single stick of the 1Gb for the last couple
> days and tomorrow will be putting the 512 back in just for testing.
> 
> I searched the archives for the error, but as far as kernel debugging
> goes, i'm very new to it.  I saw a lot of errors that looked similar but
> as i'm not exactly sure how to read all of the data from a crash I hoped
> i could get some help from the experts.
> 
> Generally when the machine hangs i get __nothing__ in the logs as far as
> a crash trace goes...the machine just seems to hang (sometimes i can
> ping it..other times not) and a hard reset is forced.  When it comes
> up..the log is void of any info.  Today the machine reset, I wasn't
> onsite, but as it was hanging i got the onsite person to give me the
> error:
> 
> <0> kernel panic not syncing: fatal exception in interrupt
> <0> kernel panic not syncing: arch/i386/kernel/irq.c:590 spin_is_locked
> on
> initialized spinlock C03a5098
> 
> 
> I'm sure there was other messages but this is all i got from him before
> he needed to get the machine running again.  He reset the machine and
> about 2 minutes later the following messages showed up in the log:
> 
> 
> Unable to handle kernel paging request at virtual address b9e91c8a
> Apr 21 16:12:44 wolverine kernel:  printing eip:
> Apr 21 16:12:44 wolverine kernel: f88aed9a
> Apr 21 16:12:44 wolverine kernel: *pde = 00000000
> Apr 21 16:12:44 wolverine kernel: Oops: 0002 [#1]
> Apr 21 16:12:44 wolverine kernel: Modules linked in: md5 ipv6 autofs4
> iptable_mangle iptable_nat ipt_LOG ipt_state ip_conntrack iptable_filter
> ip_tables uhci_hcd ehci_hcd 8139too mii floppy dm_snapshot dm_zero
> dm_mirror ext3 jbd dm_mod
> Apr 21 16:12:44 wolverine kernel: CPU:    0
> Apr 21 16:12:44 wolverine kernel: EIP:    0060:[<f88aed9a>]    Not
> tainted VLI
> Apr 21 16:12:44 wolverine kernel: EFLAGS: 00010246   (2.6.9-5.0.5.EL)
> Apr 21 16:12:44 wolverine kernel: EIP is at
> ext3_try_to_allocate_with_rsv+0xd1/0x358 [ext3]
> Apr 21 16:12:44 wolverine kernel: eax: 00000000   ebx: f7e01aa8   ecx:
> 00158000   edx: 00000000
> Apr 21 16:12:44 wolverine kernel: esi: e85bb669   edi: 00007000   ebp:
> 00000000   esp: e64abbd5
> Apr 21 16:12:44 wolverine kernel: ds: 007b   es: 007b   ss: 0068
> Apr 21 16:12:44 wolverine kernel: Process imapd (pid: 3502,
> threadinfo=e64ab000 task=e3ae38f0)
> Apr 21 16:12:44 wolverine kernel: Stack: 00000000 2b001580 94000000
> 00f69a32 00f6e4d8 00f6e4d8 01000000 00000000
> Apr 21 16:12:44 wolverine kernel:        00f6e104 00f7e01a 00000070
> 5bf6e4d8 ecf88af2 00f5d512 68000070 4ce85bb6
> Apr 21 16:12:44 wolverine kernel:        e4e64abc 80c02a10 2bf500fc
> 68000000 00e85bb6 60f6e104 00f6e785 00000000
> Apr 21 16:12:44 wolverine kernel: Call Trace:
> Apr 21 16:12:44 wolverine kernel: Code: 8d 98 a8 00 00 00 8b 42 14 01 c1
> 89 4c 24 04 8b 56 00 80 14 24 8b 46 34 89 44 24 14 8b 46 38 89 44 24 00
> 8b 04 24 8b
> 14 24 22 06 <18> 83 e2 01 09 c2 64 84 83 7c 24 18 00 74 20 84 ed 78 1c
> ff 74
> Apr 21 16:12:44 wolverine kernel:  <1>Unable to handle kernel paging
> request at virtual address b9e9168a
> Apr 21 16:12:44 wolverine kernel:  printing eip:
> Apr 21 16:12:44 wolverine kernel: f88aed9a
> Apr 21 16:12:44 wolverine kernel: *pde = 00000000
> Apr 21 16:12:44 wolverine kernel: Oops: 0002 [#2]
> Apr 21 16:12:44 wolverine kernel: Modules linked in: md5 ipv6 autofs4
> iptable_mangle iptable_nat ipt_LOG ipt_state ip_conntrack iptable_filter
> ip_tables uhci_hcd ehci_hcd 8139too mii floppy dm_snapshot dm_zero
> dm_mirror ext3 jbd dm_mod
> Apr 21 16:12:44 wolverine kernel: CPU:    0
> Apr 21 16:12:44 wolverine kernel: EIP:    0060:[<f88aed9a>]    Not
> tainted VLI
> Apr 21 16:12:44 wolverine kernel: EFLAGS: 00010206   (2.6.9-5.0.5.EL)
> Apr 21 16:12:44 wolverine kernel: EIP is at
> ext3_try_to_allocate_with_rsv+0xd1/0x358 [ext3]
> Apr 21 16:12:44 wolverine kernel: eax: 00000430   ebx: f7e014a8   ecx:
> 00048000   edx: 000004b0
> Apr 21 16:12:44 wolverine kernel: esi: f3f0ccd1   edi: 00002f54   ebp:
> 00000000   esp: f5f4fbd5
> Apr 21 16:12:44 wolverine kernel: ds: 007b   es: 007b   ss: 0068
> Apr 21 16:12:44 wolverine kernel: Process cleanup (pid: 2005,
> threadinfo=f5f4f000 task=f594e1b0)
> Apr 21 16:12:44 wolverine kernel: Stack: 000004b0 09000480 64000000
> 00f69a37 00f6ebac 00f6ebac 00000000 00000000
> Apr 21 16:12:44 wolverine kernel:        00f6f3c4 54f7e014 0000002f
> 5bf6ebac a0f88af2 54f64e89 d000002f 4cf3f0cc
> Apr 21 16:12:44 wolverine kernel:        08f5f4fc 7e000000 09c01655
> d0000000 00f3f0cc 20f6f3c4 00f69e31 d4000000
> Apr 21 16:12:44 wolverine kernel: Call Trace:
> Apr 21 16:12:44 wolverine kernel: Code: 8d 98 a8 00 00 00 8b 42 14 01 c1
> 89 4c 24 04 8b 56 00 80 14 24 8b 46 34 89 44 24 14 8b 46 38 89 44 24 00
> 8b 04 24 8b
> 14 24 22 06 <18> 83 e2 01 09 c2 64 84 83 7c 24 18 00 74 20 84 ed 78 1c
> ff 74
> 
> 
> at this point i was still logged in but after issuing a shutdown
> command..it just kept running.  Same thing when the onsite person tried
> to shut down as well.
> 
> After the reboot everything seems fine of course but i get these errors
> every time that also concern me:
> 
> Apr 21 15:31:01 wolverine kernel: PCI: Probing PCI hardware
> Apr 21 15:31:01 wolverine kernel: PCI: Probing PCI hardware (bus 00)
> Apr 21 15:31:01 wolverine kernel: PCI: Using IRQ router default
> [1106/3128] at 0000:00:00.0
> Apr 21 15:31:01 wolverine kernel: PCI: IRQ 0 for device 0000:00:0f.0
> doesn't match PIRQ mask - try pci=usepirqmask
> Apr 21 15:31:01 wolverine kernel: PCI: IRQ 0 for device 0000:00:0f.1
> doesn't match PIRQ mask - try pci=usepirqmask
> Apr 21 15:31:01 wolverine kernel: PCI: IRQ 0 for device 0000:00:0f.2
> doesn't match PIRQ mask - try pci=usepirqmask
> 
> 
> and further down:
> 
> Apr 21 15:31:03 wolverine kernel: 8139too Fast Ethernet driver 0.9.27
> Apr 21 15:31:03 wolverine kernel: eth0: RealTek RTL8139 at 0xb400,
> 00:40:63:c0:2c:fb, IRQ 10
> Apr 21 15:31:03 wolverine kernel: PCI: IRQ 0 for device 0000:00:0f.2
> doesn't match PIRQ mask - try pci=usepirqmask
> Apr 21 15:31:03 wolverine kernel: PCI: No IRQ known for interrupt pin C
> of device 0000:00:0f.2. Please try using pci=biosirq.
> Apr 21 15:31:03 wolverine kernel: ehci_hcd 0000:00:0f.2: Found HC with
> no IRQ.  Check BIOS/PCI 0000:00:0f.2 setup!
> Apr 21 15:31:04 wolverine kernel: USB Universal Host Controller
> Interface driver v2.2
> Apr 21 15:31:04 wolverine kernel: PCI: IRQ 0 for device 0000:00:0f.0
> doesn't match PIRQ mask - try pci=usepirqmask
> Apr 21 15:31:04 wolverine kernel: PCI: No IRQ known for interrupt pin A
> of device 0000:00:0f.0. Please try using pci=biosirq.
> Apr 21 15:31:04 wolverine kernel: uhci_hcd 0000:00:0f.0: Found HC with
> no IRQ.  Check BIOS/PCI 0000:00:0f.0 setup!
> Apr 21 15:31:04 wolverine kernel: PCI: IRQ 0 for device 0000:00:0f.1
> doesn't match PIRQ mask - try pci=usepirqmask
> Apr 21 15:31:04 wolverine kernel: PCI: No IRQ known for interrupt pin B
> of device 0000:00:0f.1. Please try using pci=biosirq.
> Apr 21 15:31:04 wolverine kernel: uhci_hcd 0000:00:0f.1: Found HC with
> no IRQ.  Check BIOS/PCI 0000:00:0f.1 setup!
> 
> I will repost w/the full dmesg if it's needed. 
> 
> 
> TIA,
> 
> Aaron Martinez
> 
> P.S.
> I'm not a developer, but i would like to learn more about how to debug
> these errors, at least so that i may post better questions in the
> future, any pointers to info in this regard would be appreciated.
> 
> 
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-- 
P.Lavin
Software Engineer,
Redpine Signals ,Inc.
Hyderabad.
http://www.redpinesignals.com