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Bug #2266

closed

panic during shutdown

Added by nonsolosoft almost 13 years ago. Updated over 12 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
12/27/2011
Due date:
% Done:

100%

Estimated time:

Description

it panics during shutdown on vop_write+0x110 at movl 0x44(%edx),edx

http://dl.dropbox.com/u/22827045/IMG_0239.JPG
http://dl.dropbox.com/u/22827045/IMG_0240.JPG
http://dl.dropbox.com/u/22827045/IMG_0242.JPG

uname -a

DragonFly lap.diff.org 2.13-DEVELOPMENT DragonFly v2.13.0.709.g50e40-DEVELOPMENT #17: Mon Dec 26 23:03:55 CET 2011 :/usr/obj/mnt2/src/sys/GENERIC i386


Related issues 1 (0 open1 closed)

Related to Bug #2286: 3.0 release catchall ticketClosedjustin01/22/2012

Actions
Actions #1

Updated by vsrinivas almost 13 years ago

Hi,

It looks like the system accessed the address 0xdeadc122, which is 0xdeadc0de + 0x44; deadcode is filled in to free()d kernel memory.

The particular dereference that generated this invalid address was the extraction of the mountpoint from the vnode structure in vop_write. This means that vop_write was using an already-kfree()d vnode, which is bad news.

Actions #2

Updated by jaydg almost 13 years ago

I've experienced the same problem:

Fatal trap 12: page fault while in kernel mode
cpuid = 0; lapic.id = 00000000
fault virtual address = 0xdeadc122
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc028913f
stack pointer = 0x10:0xd62cc6c8
frame pointer = 0x10:0xd62cc7d0
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 = 1 (init)
current thread = pri 31
<- SMP: XXX
kernel: type 12 trap, code=0

CPU0 stopping CPUs: 0x00000000
stopped

I have a crash dump available. It's a rather bulky 105MB xz compressed tar ball.

Actions #3

Updated by vsrinivas almost 13 years ago

Could you upload the kernel & core to someplace we can access? It'd be great help!

Actions #4

Updated by ftigeot almost 13 years ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 50

Possibly fixed by commit cf7ad7d148d126095d2261798f8f289a0d170959

Actions #5

Updated by ftigeot over 12 years ago

  • Status changed from In Progress to Closed
  • % Done changed from 50 to 100

Confirmed fixed as of today

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