kern/53245: ida(4) panic during boot

[William Carrel]

>Number:         53245
>Category:       kern
>Synopsis:       ida(4) panic during boot
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 11 23:10:13 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     William Carrel
>Release:        FreeBSD 5.1-RELEASE i386
>Organization:
>Environment:
FreeBSD 5.1-CURRENT JPSNAP from 11-Jun-2003
FreeBSD 5.1-RELEASE is also affected by this bug

Compaq Proliant 1850R with Smart Array 221 Controller with 2 disks configured
as one logical volume
	
>Description:
        Machines with ida(4) supported hard disk controllers will panic
        on boot in ida_construct_qcb() as GEOM starts inspecting the first
        disk on the ida controller.  Panic does not occur with ida(4) driver
        disabled.
 
        Last message before panic on verbose boot is:
        GEOM: new disk idad0
 
        DDB trace at panic shows:
        ida_construct_qcb()
        ida_submit_buf()
        idad_strategy()
        g_disk_start()
        g_io_schedule_down()
        g_down_procbody()
        fork_exit()
        fork_trampoline()
 
        Panic is:
        Fatal trap 12: page fault while in kernel mode
        supervisor read, page not present
        pid is 4 (g_down)
 
        The panic occurs on ida_construct_qcb+0xca: movzbl 0x5c(%eax),%eax
        which looks very much like the spot where this function bzero()s
        the hardware qcb.
 
        This was previously reported on the current mailing list by
        Ventsislav Velkov <veno at evrocom.net> on 31 March 2003
        (Message-Id: <006401c2f776$d16f0230$23f00ad9 at beatle>) on similar
        Compaq hardware.  It is likely that this bug has existed
        at least since that time.

	(This is a correction to pending/53238 which was mangled by my
	mail client, sorry.)
	
>How-To-Repeat:
        Attempt to boot 5.1-RELEASE or 5.1-CURRENT SNAP's (either floppy or
        CD) on systems with ida(4) supported hardware with at least one
        volume configured on the ida controller.
	
>Fix:
	Unknown.
	


>Release-Note:
>Audit-Trail:
>Unformatted: