DragonFly bugs List (threaded) for 2011-12
[DragonFlyBSD - Bug #2266] panic during shutdown
Issue #2266 has been updated by Venkatesh Srinivas.
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.
Bug #2266: panic during shutdown
Author: Ferruccio Zamuner
it panics during shutdown on vop_write+0x110 at movl 0x44(%edx),edx
> uname -a
DragonFly lap.diff.org 2.13-DEVELOPMENT DragonFly v220.127.116.119.g50e40-DEVELOPMENT #17: Mon Dec 26 23:03:55 CET 2011 email@example.com:/usr/obj/mnt2/src/sys/GENERIC i386
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