Fatal Trap 12 every few days…

GoldServe

Ever since I upgraded to the latest builds, i've experienced fatal trap 12 every few days with the same config.

Can anyone see what module is causing this?

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address   = 0xc050048
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0b0c4d1
stack pointer           = 0x28:0xeb07f7d8
frame pointer           = 0x28:0xeb07f7fc
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 12 (irq256: em0:rx 0)
[thread]
Stopped at      rn_match+0x11:  movl    0xc(%eax),%ebx
db> bt
Tracing pid 12 tid 64029 td 0xc4aff000
rn_match(c130852c,c588e600,c5c31388,c52a001e,eb07f8b4,...) at rn_match+0x11
pfr_match_addr(c5c18000,c52a001a,2,e072,eb07f89c,...) at pfr_match_addr+0xe0
pf_test_udp(eb07f978,eb07f974,1,c4c59600,c52b4100,...) at pf_test_udp+0x8aa
pf_test(1,c4b37400,eb07fb44,0,0,...) at pf_test+0x242f
pf_check_in(0,eb07fb44,c4b37400,1,0,...) at pf_check_in+0x46
pfil_run_hooks(c1353e60,eb07fb94,c4b37400,1,0,...) at pfil_run_hooks+0x93
ip_input(c52b4100,10,982f000,0,0,...) at ip_input+0x359
netisr_dispatch_src(1,0,c52b4100,eb07fc00,c0af9e4f,...) at netisr_dispatch_src+0x70
netisr_dispatch(1,c52b4100,c4ab0700,c4b37400) at netisr_dispatch+0x20
ether_demux(c4b37400,c52b4100,3,0,3,...) at ether_demux+0x19f
ether_input(c4b37400,c52b4100,eb07fc58,c4aff000,eb07fc4c,...) at ether_input+0x15d
em_rxeof(1,f0de766,c4b33e40,c4b25300,eb07fcc0,...) at em_rxeof+0x184
em_msix_rx(c4ab0700,0,109,496b6ed8,16eaf,...) at em_msix_rx+0x23
intr_event_execute_handlers(c498f7f8,c4b25300,c0ee391c,52d,c4b25370,...) at intr_event_execute_handlers+0xde
ithread_loop(c4b39470,eb07fd38,ffffffff,ffffffff,ffffffff,...) at ithread_loop+0x66
fork_exit(c0a11ad0,c4b39470,eb07fd38) at fork_exit+0x88
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xeb07fd70, ebp = 0 ---
db>[/thread]

GoldServe

Here is vmstat -i…

# vmstat -i
interrupt                          total       rate
irq4: uart0                         1261          2
irq16: ath0 uhci3                  25219         49
irq19: em5 uhci1+                   7239         14
cpu0: timer                      1010862       1989
irq256: em0:rx 0                   22828         44
irq257: em0:tx 0                    7124         14
irq258: em0:link                       1          0
irq259: em1:rx 0                   17745         34
irq260: em1:tx 0                    4251          8
irq261: em1:link                       3          0
irq262: em2:rx 0                      43          0
irq263: em2:tx 0                     490          0
irq264: em2:link                       2          0
irq265: em3:rx 0                    8718         17
irq266: em3:tx 0                   12026         23
irq267: em3:link                       1          0
cpu1: timer                      1010875       1989
Total                            2128688       4190

I also disabled hardware checksum offload (all three options) to see if this will help my crash. Funny this is happening now…

eri--

It seems like something in your local hardware that might be causing this.
Broken RAM?

GoldServe

I can see in a few days if this happens but it all started after i upgraded to an august build and it seems to happen every few days. If i can get the BT and it looks the same, i don't think it is the ram so much. Thanks for looking though…

GoldServe

Nope, i don't think this is ram related. Same error just happened.

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xc050048
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc0b0c4d1
stack pointer           = 0x28:0xeb0ba7d8
frame pointer           = 0x28:0xeb0ba7fc
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 12 (irq259: em1:rx 0)
[thread]
Stopped at      rn_match+0x11:  movl    0xc(%eax),%ebx
db> bt
Tracing pid 12 tid 64034 td 0xc4afe280
rn_match(c130852c,c5ada300,c5c3f710,c55f381e,eb0ba8b4,...) at rn_match+0x11
pfr_match_addr(c5be4000,c55f381a,2,e072,eb0ba89c,...) at pfr_match_addr+0xe0
pf_test_udp(eb0ba978,eb0ba974,1,c4c59500,c5829500,...) at pf_test_udp+0x8aa
pf_test(1,c4b36c00,eb0bab44,0,0,...) at pf_test+0x242f
pf_check_in(0,eb0bab44,c4b36c00,1,0,...) at pf_check_in+0x46
pfil_run_hooks(c1353e60,eb0bab94,c4b36c00,1,0,...) at pfil_run_hooks+0x93
ip_input(c5829500,10,c203000,0,0,...) at ip_input+0x359
netisr_dispatch_src(1,0,c5829500,eb0bac00,c0af9e4f,...) at netisr_dispatch_src+0x70
netisr_dispatch(1,c5829500,c4b35000,c4b36c00) at netisr_dispatch+0x20
ether_demux(c4b36c00,c5829500,3,0,3,...) at ether_demux+0x19f
ether_input(c4b36c00,c5829500,eb0bac58,c4afe280,eb0bac4c,...) at ether_input+0x15d
em_rxeof(0,b7ad47a,c4b57340,c4b50080,eb0bacc0,...) at em_rxeof+0x184
em_msix_rx(c4b35000,0,109,8c57ea70,117a2,...) at em_msix_rx+0x23
intr_event_execute_handlers(c498f7f8,c4b50080,c0ee391c,52d,c4b500f0,...) at intr_event_execute_handlers+0xde
ithread_loop(c4b4ca40,eb0bad38,0,0,0,...) at ithread_loop+0x66
fork_exit(c0a11ad0,c4b4ca40,eb0bad38) at fork_exit+0x88
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xeb0bad70, ebp = 0 ---
[/thread]

eri--

Can you check on the system log what events appear when this happens?

GoldServe

Sorry, how am I able to view the system log file from the db> prompt?

eri--

After you reboot the machine!

GoldServe

Hrm, doesn't the system log files get overwritten on every boot?

eskild

My fw had a similar crash today! psSense 2.0.

I have never experienced this before. If there anyway I can collect information from pfSense after a reboot that makes troubleshooting easier? Logs, coredumps?

I have used pfSense since Rel1 was in alpha stage, and this is the first time I had to physically reset the fw due to instabillity.

Please see the attached image.

pfSenseCrash-05dec2011.jpg_thumb

GoldServe

Can you type "bt" at the prompt?

eskild

bt: Command not found.

I have restarted the fw though as no traffic was possible after the crash.

GoldServe

you must have an embedded platform where the kernel does not allow "back trace"

I believe there is a way to change the kernel on the embedded platform. Someone more knowledgeable can chime in.

eskild

I do not have embedded plattform. I have a default x86 install: pfSense 2.0-RELEASE-pfSense (i386)

stephenw10

You can only run a back trace at the db> prompt, after a crash, not if:

@eskild:

I have restarted the fw though as no traffic was possible after the crash.

Steve

eskild

Thanks, I suspected that.
It might be good to evaluate features that captures system information that can be used for troubleshooting by the dev team later.
I was surprised that after the boot, there were no traces from the crash at all, and impossible to provide any hard evidence of what have happened.
I doubt that there are many firewalls that can be offline for a long time while consulting support. Most of us need to reboot and have the system back in service right away.

Just my two cents.

Back to the problem at hand. Is it possible that the crash can be caused by memory issue (RAM)? I have seen instabillities on other systems being caused by failing RAM.

Thanks

jimp

We fixed the fact that some crashes do not automatically restart in 2.0.1/2.1, but it's an easy fix:

Edit /etc/ddb.conf and change

script kdb.enter.panic=textdump set; capture on; run lockinfo; show pcpu; bt; ps; alltrace; capture off; call doadump; reset

to

script kdb.enter.default=textdump set; capture on; run lockinfo; show pcpu; bt; ps; alltrace; capture off; call doadump; reset

(So just change kdb.enter.panic to kdb.enter.default)

Then run:

/sbin/ddb /etc/ddb.conf

From that point on it should collect the debug data and reboot itself automatically, and also give you a crash report notice in the GUI that you can use to upload the data to our servers (or grab it from /var/crash yourself)

From that panic it could be faulty hardware, but it's hard to say for sure. Usually if it's bad RAM the crashes would be in a different place every time, not in the exact same path. Though it could be a faulty NIC.

atul

Hello,

I am also getting the same error every few days, or sometimes more than once a day. I have recently upgraded from 1.2.3 to 2.0.1. But, the pfSense was crashing and restarting before the upgrade, so it is not "only" associated with 2.0.1 release.

I am attaching the entire crash log (long) that I was able to see on the GUI. I have sent it to pfSense team for further analysis.

Atul.

[Crash Report.txt](/public/imported_attachments/1/Crash Report.txt)

jimp

@atul:

Hello,

I am also getting the same error every few days, or sometimes more than once a day. I have recently upgraded from 1.2.3 to 2.0.1. But, the pfSense was crashing and restarting before the upgrade, so it is not "only" associated with 2.0.1 release.

I am attaching the entire crash log (long) that I was able to see on the GUI. I have sent it to pfSense team for further analysis.

Atul.

That crash is in code writing to the filesystem. There is very little likelihood there is a problem in that code, it's been solid for years on FreeBSD.

More likely your HDD or storage media has issues, or it could be cabling/controller/DMA issues, but it's definitely storage.

atul

Thanks jimp. I will change the hard disk and check again.

Out of curiosity - how did you know that this is storage related?

Atul.