[issue2081] Panic on device "detach" / "failure"

[Venkatesh Srinivas (via DragonFly issue tracker)]

New submission from Venkatesh Srinivas <vsrinivas at dragonflybsd.org>:

. ..
ad10: FAILURE - device detached
subdisk10: detached
ad10: detached


Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0xa4
fault code		= supervisor write, page not present
instruction pointer	= 0x8:0xc03457e3
stack pointer	        = 0x10:0xc96aac44
frame pointer	        = 0x10:0xc96aac5c
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		= Idle
current thread          = pri 14 (CRIT)

trap number		= 12
panic: page fault
Trace beginning at frame 0xc96aab20
panic(ffffffff,c07ace20,c064edd8,c96aab50,c96aabfc) at panic+0x101
panic(c064edd8,c067eace,1,1,1) at panic+0x101
trap_fatal(0,0,1,1,3130) at trap_fatal+0x33f
trap_pfault(c034d4b3,c7d8c9f8,0,c96aabe4,a4) at trap_pfault+0x13c
trap(c96aabfc) at trap+0x4c6
calltrap() at calltrap+0xd
--- trap 0, eip = 0x2, esp = 0x10296, ebp = 0x1 ---
Uptime: 2d21h28m20s
Physical memory: 502 MB
Dumping 204 MB: 189 173 157 141 125 109 93 77 61 45 29 13

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messages: 9927
nosy: vsrinivas
status: unread
title: Panic on device "detach" / "failure"

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DragonFly issue tracker <bugs at lists.dragonflybsd.org>
<http://bugs.dragonflybsd.org/issue2081>
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