kern/185771: Kernel panic with RADIX_MPATH kernel option

[Attila Nagy]

>Number:         185771
>Category:       kern
>Synopsis:       Kernel panic with RADIX_MPATH kernel option
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 14 12:20:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator:     Attila Nagy
>Release:        stable/10 at r260625
>Organization:
>Environment:
>Description:
On a netbooted machine, with the following kernel config:

include GENERIC
options RADIX_MPATH
options SMP
options BOOTP
options BOOTP_NFSV3
options BOOTP_NFSROOT
options NFSCLIENT
device          carp
device          crypto          # core crypto support
device          cryptodev       # /dev/crypto for access to h/w
options KDB
options DDB

it crashes during the kernel BOOTP/DHCP phase with:
da0 at mpt0 bus 0 scbus2 target 0 lun 0
da0: <VMware Virtual disk 1.0> Fixed Direct Access SCSI-2 device
da0: 300.000MB/s transfers
da0: Command Queueing enabled
da0: 5120MB (10485760 512 byte sectors: 255H 63S/T 652C)
panic: bootpc_fakeup_interfac: SIOCAIFADDR, error=17
cpuid = 0
KDB stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffffff81891a40
kdb_backtrace() at kdb_backtrace+0x39/frame 0xffffffff81891af0
panic() at panic+0x155/frame 0xffffffff81891b70
bootpc_init() at bootpc_init+0x1ef7/frame 0xffffffff81891c90
mi_startup() at mi_startup+0x118/frame 0xffffffff81891cb0
btext() at btext+0x2c
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x3e: movq    $0, kdb_why


>How-To-Repeat:

>Fix:


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