Date: Wed, 20 Sep 2000 22:17:03 -0700 (PDT) From: beaupran@iro.umontreal.ca To: freebsd-gnats-submit@FreeBSD.org Subject: kern/21438: Sox recording in 16 bits creates a panic: no feed Message-ID: <20000921051703.B032D37B422@hub.freebsd.org>
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>Number: 21438
>Category: kern
>Synopsis: Sox recording in 16 bits creates a panic: no feed
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Sep 20 22:20:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator: Antoine Beaupre
>Release: FreeBSD 4.1-RELEASE
>Organization:
Nada
>Environment:
FreeBSD shall.anarcat.yi.org 4.1-RELEASE FreeBSD 4.1-RELEASE #33: Wed Sep 20 21:33:35 EDT 2000 root@shall.anarcat.yi.org:/usr/src/sys/compile/SHALL i386
Current kernel config:
########################################################################
#
# S H A L L
#
########################################################################
# CPU & kernel options
ident SHALL
maxusers 32
machine i386
cpu I586_CPU #Pentium MMX
options CPU_FASTER_5X86_FPU #Faster FPU exception handler
# FPU onboard, do not need this
#options MATH_EMULATE #Support for x87 emulation
#####################################################################
# DEBUGGING OPTIONS
options DDB # Enable the kernel debugger.
#options DDB_UNATTENDED # It's important to put this back on
makeoptions DEBUG=-g #Build kernel with gdb(1) debug symbols
########################################################################
# Compatibility options
options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!]
options SYSVSHM #SYSV-style shared memory
options SYSVMSG #SYSV-style message queues
options SYSVSEM #SYSV-style semaphores
########################################################################
# Networking options
options INET #InterNETworking
#options INET6 #IPv6 communications protocols
options ICMP_BANDLIM #Rate limit bad replies
# Pseudo devices - the number indicates how many units to allocated.
pseudo-device loop # Network loopback
pseudo-device ether # Ethernet support
#pseudo-device sl 1 # Kernel SLIP
#pseudo-device ppp 1 # Kernel PPP
pseudo-device tun # Packet tunnel.
#pseudo-device gif 4 # IPv6 and IPv4 tunneling
#pseudo-device faith 1 # IPv6-to-IPv4 relaying (translation)
# The `bpf' pseudo-device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
pseudo-device bpf #Berkeley packet filter
########################################################################
# Filesystem options
options FFS #Berkeley Fast Filesystem
options FFS_ROOT #FFS usable as root device [keep this!]
options SOFTUPDATES #Enable FFS soft updates support
#options MFS #Memory Filesystem
#options MD_ROOT #MD is a potential root device
options MSDOSFS #MSDOS Filesystem
options CD9660 #ISO 9660 Filesystem
options CD9660_ROOT #CD-ROM usable as root, CD9660 required
options PROCFS #Process filesystem
options QUOTA #Enable disk quotas
#options NFS #Network Filesystem
#options NFS_ROOT #NFS usable as root device, NFS required
#options NFS_NOSERVER #Disable the NFS server code
########################################################################
# POSIX P1003.1B
options P1003_1B #Posix P1003_1B real-time extensions
options _KPOSIX_PRIORITY_SCHEDULING
########################################################################
# SCSI device configuration
options SCSI_DELAY=2000 #Delay (in ms) before probing SCSI
# SCSI Controllers
device ahc # AHA2940 and onboard AIC7xxx devices
# SCSI peripherals
device scbus # SCSI bus (required)
device da # Direct Access (disks)
device sa # Sequential Access (tape etc)
device cd # CD
device pass # Passthrough device (direct SCSI access)
device pt #Scanner
########################################################################
# Miscellaneous devices and options
pseudo-device pty # Pseudo-ttys (telnet etc)
pseudo-device md # Memory "disks"
options UCONSOLE #Allow users to grab the console
options USERCONFIG #boot -c editor
options VISUAL_USERCONFIG #visual boot -c editor
options KTRACE #ktrace(1) support
########################################################################
# Hardware device configuration
device isa
device eisa
device pci
# atkbdc0 controls both the keyboard and the PS/2 mouse
device atkbdc0 at isa? port IO_KBD
device atkbd0 at atkbdc? irq 1 flags 0x1
device psm0 at atkbdc? irq 12
device vga0 at isa?
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
# syscons is the default console driver, resembling an SCO console
device sc0 at isa? flags 0x100
# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver
#device vt0 at isa?
#options XSERVER # support for X server on a vt console
#options FAT_CURSOR # start with block cursor
# If you have a ThinkPAD, uncomment this along with the rest of the PCVT lines
#options PCVT_SCANSET=2 # IBM keyboards are non-std
# splash screen/screen saver
pseudo-device splash
# Floating point support - do not disable.
device npx0 at nexus? port IO_NPX irq 13
# ATA and ATAPI devices
device ata0 at isa? port IO_WD1 irq 14
device ata1 at isa? port IO_WD2 irq 15
device ata
device atadisk # ATA disk drives
device atapicd # ATAPI CDROM drives
device atapifd # ATAPI floppy drives
#device atapist # ATAPI tape drives
options ATA_STATIC_ID #Static device numbering
options ATA_ENABLE_ATAPI_DMA #Enable DMA on ATAPI devices
# Floppy drives
device fdc0 at isa? port IO_FD1 irq 6 drq 2
device fd0 at fdc0 drive 0
#device fd1 at fdc0 drive 1
# Power management support (see LINT for more options)
device apm0 at nexus? disable flags 0x20 # Advanced Power Management
# Serial (COM) ports
device sio0 at isa? port IO_COM1 flags 0x10 irq 4
device sio1 at isa? port IO_COM2 irq 5
#device sio2 at isa? port IO_COM3 irq 5
#device sio3 at isa? disable port IO_COM4 irq 9
# Parallel port
device ppc0 at isa? irq 7
device ppbus # Parallel port bus (required)
device lpt # Printer
device plip # TCP/IP over parallel
device ppi # Parallel port interface device
#device vpo # Requires scbus and da
#controller pnp0 # Why has this disappeared in 4.x?
# ISA el'cheapo NIC
#ep0: <3Com 3C509-TPO EtherLink III> at port 0x200-0x20f irq 5 on isa0
#ep0: Ethernet address 00:10:5a:aa:51:33
device ep
########################################################################
# Sound devices
device pcm
device sbc # at isa? port 0x220 irq 10 drq 1 flags 0x15
#device snd0
#device sb0 at isa? port 0x220 irq 9 drq 3
#device sbxvi0 at isa? drq 7
#device sbmidi0 at isa? port 0x300
#device awe0 at isa? port 0x620
device speaker
device pca0 at isa? port IO_TIMER1
device joy0 at isa? port IO_GAME #this conflicts with NIC
########################################################################
# USB Support
device uhci
#device ohci
device usb #USB bus
#device ugen #Generic
>Description:
Recording a wave file in hi-fi (16 bits) with sox makes FreeBSD 4.1 panic.
shall# gdb -k /sys/compile/SHALL/kernel.debug
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd"...core
(kgdb) core-file /usr/crash/vmcore.10048
IdlePTD 3313664
initial pcb at 2a9480
panicstr: from debugger
panic messages:
---
panic: no feed
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x833d6628
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01cebc0
stack pointer = 0x10:0xc3dc9b9c
frame pointer = 0x10:0xc3dc9bc8
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 = 246 (sox)
interrupt mask = tty
tot = 51732 (active = 108, free = 51624 (reserved = 46224, slush = 5400))
panic: from debugger
panic: from debugger
Uptime: 6m27s
dumping to dev #da/0x20001, offset 36864
dump 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
---
#0 boot (howto=260) at ../../kern/kern_shutdown.c:302
302 dumppcb.pcb_cr3 = rcr3();
#0 boot (howto=260) at ../../kern/kern_shutdown.c:302
#1 0xc0159a11 in panic (fmt=0xc0236a54 "from debugger")
at ../../kern/kern_shutdown.c:552
#2 0xc012ffb1 in db_panic (addr=-1071579165, have_addr=0, count=-1,
modif=0xc3dc9bf8 "") at ../../ddb/db_command.c:433
#3 0xc012ff51 in db_command (last_cmdp=0xc0266e1c, cmd_table=0xc0266c7c,
aux_cmd_tablep=0xc02a5818) at ../../ddb/db_command.c:333
#4 0xc0130016 in db_command_loop () at ../../ddb/db_command.c:455
#5 0xc0132123 in db_trap (type=10, code=0) at ../../ddb/db_trap.c:71
#6 0xc020fd7e in kdb_trap (type=10, code=0, regs=0xc3dc9d00)
at ../../i386/i386/db_interface.c:158
#7 0xc021bf28 in trap (frame={tf_fs = 16, tf_es = 16, tf_ds = 16, tf_edi = 2,
tf_esi = 256, tf_ebp = -1008951992, tf_isp = -1008952020,
tf_ebx = -1071310752, tf_edx = 0, tf_ecx = 6489242, tf_eax = 18,
tf_trapno = 10, tf_err = 0, tf_eip = -1071579165, tf_cs = 8,
tf_eflags = 838, tf_esp = -1071277089, tf_ss = -1071394717})
at ../../i386/i386/trap.c:552
#8 0xc020ffe3 in Debugger (msg=0xc023d063 "panic")
at ../../i386/i386/db_interface.c:319
#9 0xc0159a08 in panic (fmt=0xc0251860 "no feed")
at ../../kern/kern_shutdown.c:550
#10 0xc01edb23 in chn_rdfeed2nd ()
#11 0xc01edc83 in chn_read ()
#12 0xc01eeb84 in dsp_read ()
#13 0xc01f0b55 in sndread ()
#14 0xc0190333 in spec_read ()
#15 0xc01c52fc in ufsspec_read ()
#16 0xc01c5849 in ufs_vnoperatespec ()
#17 0xc018aac8 in vn_read ()
#18 0xc0166a49 in dofileread ()
#19 0xc016693f in read ()
#20 0xc021c869 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
tf_edi = 1965, tf_esi = 672307616, tf_ebp = -1077937540,
tf_isp = -1008951340, tf_ebx = 672240036, tf_edx = 672307704,
tf_ecx = 0, tf_eax = 3, tf_trapno = 12, tf_err = 2, tf_eip = 672199776,
tf_cs = 31, tf_eflags = 663, tf_esp = -1077937584, tf_ss = 47})
at ../../i386/i386/trap.c:1126
#21 0xc02106c5 in Xint0x80_syscall ()
#22 0x280fd47e in ?? ()
#23 0x280dec0d in ?? ()
#24 0x8051f01 in ?? ()
#25 0x8052151 in ?? ()
#26 0x8049bbd in ?? ()
#27 0x80493d7 in ?? ()
#28 0x8048f61 in ?? ()
Obviously, this is not enough. :) The upper frames from #8 are in the
inline debugger. I thought I could use it, but somehow, I really don't
know how this thing (DDB) works.
However, using the advice from the FAQ:
bash-2.04$ nm /kernel | grep c01ceb
c01ceb20 t vm_object_check
c01ceb84 t vm_object_print_static
bash-2.04$
Doesn't get us anywhere closer. I think the thing to look for is
"syscall2". I don't know how to decode the arg, though. I leave this
to you from here on.
>How-To-Repeat:
rec -w test.wav
panic: no feedYeah.
A personal program I wrote doesn't have this behavior. wavrec (from
the wavplay-1.4 package) either. However, it can't record anything
else than garbage. Same for my personal program.
>Fix:
Unknown
>Release-Note:
>Audit-Trail:
>Unformatted:
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