[DragonFlyBSD - Bug #1791] (Feedback) Panic: "Fatal trap 12: page fault while in kernel mode"

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Issue #1791 has been updated by tuxillo.

Description updated
Category set to Kernel
Status changed from New to Feedback
Assignee deleted (0)
Target version set to 4.2.x

Hi,

Is this still reproducible?

Cheers,
Antonio Huete

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Bug #1791: Panic: "Fatal trap 12: page fault while in kernel mode"
http://bugs.dragonflybsd.org/issues/1791#change-12534

* Author: ftigeot
* Status: Feedback
* Priority: Normal
* Assignee: 
* Category: Kernel
* Target version: 4.2.x
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I have just been bitten by this panic on a 4 cores Xeon server running
DragonFly 2.6.3/i386.
It is usually lightly loaded and mainly used for mail services.

I have also setup a local chroot with a devfs mount of /dev and a nullfs
mount of /usr/pkgsrc/distfiles to build packages.
The panic occurred just after I exited a chrooted root shell.

I wasn't able to get a core dump: the keyboard was completely unresponsive
in the debugger and I had to reboot the machine with the reset switch.

Details of the crash follow:

Fatal trap 12: page fault while in kernel mode
mp_lock = 00000002; cpuid = 2; lapic.id = 04000000
fault virtual address   = 0
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc02d0a55
stack pointer           = 0x10:0xe30729ac
frame pointer           = 0x10:0xe3072a40
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         = 89056 (zsh)
current thread          = pri 6
 <- SMP: XXX
kernel: type 12 trap, code=0

CPU2 stopping CPUs: 0x0000000b
 stopped
Stopped at      devfs_getattr+0x1b:    movl    0(%edi),%edx
db>



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