Date: Mon, 19 May 2003 23:54:12 +0200 (CEST) From: Stacy Olivas <olivas@digiflux.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/52445: Kernel panics when mounting floppy on MFS filesystem Message-ID: <200305192154.h4JLsCtv055089@digiflux.org> Resent-Message-ID: <200305192200.h4JM0Uht089218@freefall.freebsd.org>
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>Number: 52445 >Category: kern >Synopsis: Kernel panics when mounting floppy on MFS filesystem >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon May 19 15:00:29 PDT 2003 >Closed-Date: >Last-Modified: >Originator: Stacy Olivas >Release: FreeBSD 5.0-RELEASE-p7 i386 >Organization: >Environment: System: FreeBSD digiflux.org 5.0-RELEASE-p7 FreeBSD 5.0-RELEASE-p7 #4: Tue May 13 01:26:44 CEST 2003 olivas@digiflux.org:/usr/src/sys/i386/compile/Sentinel i386 >Description: When building a kernel with an MD_ROOT_SIZE size => 8000 bytes (~7.8 megs), after the kernel has successfully loaded, if you subsequently try mounting a floppy disk (to a mount point on the MFS) (doesn't matter if it's fresh floppy or has some files on it) the kernel panics with the following message: panic: isa_dmastart: bad bounce buffer syncing disks, buffers remaining... panic: bwrite: buffer is not busy??? But, for an MFS that is 7000 (~6.8 megs) it works with out a hitch. This behavior has been reproducable on two different systems with more than plenty of memort available. -- dmesg output of kernel that panics (MD_ROOT_SIZE=8000) (thank god dmesg is saved between warm boots): Copyright (c) 1992-2003 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.0-RELEASE-p7 #1: Fri May 16 15:18:39 CEST 2003 olivas@thos.digiflux.org:/usr/src/release/picobsd/warbsd/build_dir-warbsd/PICOBSD-warbsd Preloaded elf kernel "/kernel" at 0xc0f86000. Timecounter "i8254" frequency 1193182 Hz Timecounter "TSC" frequency 360790606 Hz CPU: AMD-K6(tm) 3D+ Processor (360.79-MHz 586-class CPU) Origin = "AuthenticAMD" Id = 0x591 Stepping = 1 Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX> AMD Features=0xffffffff80000800<SYSCALL,3DNow!> real memory = 167772160 (160 MB) avail memory = 146579456 (139 MB) Initializing GEOMetry subsystem K6-family MTRR support enabled (2 registers) ACPI-0159: *** Error: AcpiLoadTables: Could not get RSDP, AE_NO_ACPI_TABLES ACPI-0213: *** Error: AcpiLoadTables: Could not load tables: AE_NO_ACPI_TABLES ACPI: table load failed: AE_NO_ACPI_TABLES npx0: <math processor> on motherboard npx0: INT 16 interface Using $PIR table, 4 entries at 0xc00fdf70 pcib0: <OPTi 82C700 host to PCI bridge> at pcibus 0 on motherboard pci0: <PCI bus> on pcib0 isab0: <PCI-ISA bridge> at device 1.0 on pci0 isa0: <ISA bus> on isab0 cbb0: <TI1131 PCI-CardBus Bridge> at device 10.0 on pci0 cardbus0: <CardBus bus> on cbb0 pccard0: <16-bit PCCard bus> on cbb0 pci_cfgintr: 0:10 INTA routed to irq 11 cbb1: <TI1131 PCI-CardBus Bridge> at device 10.1 on pci0 cardbus1: <CardBus bus> on cbb1 pccard1: <16-bit PCCard bus> on cbb1 pci_cfgintr: 0:10 INTB routed to irq 11 pci0: <display, VGA> at device 18.0 (no driver attached) ohci0: <OPTi 82C861 (FireLink) USB controller> mem 0xfecff000-0xfecfffff irq 10 at device 19.0 on pci0 usb0: OHCI version 1.0, legacy support usb0: <OPTi 82C861 (FireLink) USB controller> on ohci0 usb0: USB revision 1.0 uhub0: OPTi OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered atapci0: <Generic PCI ATA controller> port 0xfcf0-0xfcff at device 20.0 on pci0 atapci0: Busmastering DMA not supported ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 orm0: <Option ROM> at iomem 0xc0000-0xcbfff on isa0 fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0 isa_dmainit(2, 1024) failed fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0 atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 psm0: <PS/2 Mouse> irq 12 on atkbdc0 psm0: model Generic PS/2 mouse, device ID 0 vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1: configured irq 3 not in bitmap of probed irqs 0 sio1: port may not be enabled unknown: <PNP0303> can't assign resources (port) speaker0: <PC speaker> at port 0x61 on isa0 psmcpnp0: irq resource info is missing; assuming irq 12 unknown: <PNP0501> can't assign resources (port) unknown: <PNP0700> can't assign resources (port) Timecounters tick every 10.000 msec ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to accept, logging limited to 100 packets/entry by default wi0: <WaveLAN/IEEE> at port 0x100-0x13f irq 11 function 0 config 1 on pccard0 wi0: 802.11 address: 00:90:d1:07:60:ee wi0: using RF:PRISM2 MAC:HFA3841 CARD:HWB3163 rev.A wi0: Intersil Firmware: Primary 0.03.00, Station 0.07.06 ad0: 19077MB <IBM-DJSA-220> [38760/16/63] at ata0-master BIOSPIO acd0: CDROM <TOSHIBA CD-ROM XM-1902B> at ata1-master BIOSPIO Mounting root from ufs:/dev/md0 <118>May 17 01:37:02 init: /etc/pwd.db: No such file or directory <118>Enter full pathname of shell or RETURN for /bin/sh: <118># Waiting (max 60 seconds) for system process `vnlru' to stop...stopped Waiting (max 60 seconds) for system process `bufdaemon' to stop...stopped Waiting (max 60 seconds) for system process `syncer' to stop...stopped syncing disks, buffers remaining... done Uptime: 34s Rebooting... ---------------- dmesg output of kernel that mounts a floppy disk with no problems (MD_ROOTSIZE=7000): Copyright (c) 1992-2003 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 5.0-RELEASE-p7 #2: Fri May 16 15:56:53 CEST 2003 olivas@thos.digiflux.org:/usr/src/release/picobsd/warbsd/build_dir-warbsd/PICOBSD-warbsd Preloaded elf kernel "/kernel" at 0xc0e90000. Timecounter "i8254" frequency 1193182 Hz Timecounter "TSC" frequency 360790865 Hz CPU: AMD-K6(tm) 3D+ Processor (360.79-MHz 586-class CPU) Origin = "AuthenticAMD" Id = 0x591 Stepping = 1 Features=0x8021bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,PGE,MMX> AMD Features=0xffffffff80000800<SYSCALL,3DNow!> real memory = 167772160 (160 MB) avail memory = 147582976 (140 MB) Initializing GEOMetry subsystem K6-family MTRR support enabled (2 registers) ACPI-0159: *** Error: AcpiLoadTables: Could not get RSDP, AE_NO_ACPI_TABLES ACPI-0213: *** Error: AcpiLoadTables: Could not load tables: AE_NO_ACPI_TABLES ACPI: table load failed: AE_NO_ACPI_TABLES npx0: <math processor> on motherboard npx0: INT 16 interface Using $PIR table, 4 entries at 0xc00fdf70 pcib0: <OPTi 82C700 host to PCI bridge> at pcibus 0 on motherboard pci0: <PCI bus> on pcib0 isab0: <PCI-ISA bridge> at device 1.0 on pci0 isa0: <ISA bus> on isab0 cbb0: <TI1131 PCI-CardBus Bridge> at device 10.0 on pci0 cardbus0: <CardBus bus> on cbb0 pccard0: <16-bit PCCard bus> on cbb0 pci_cfgintr: 0:10 INTA routed to irq 11 cbb1: <TI1131 PCI-CardBus Bridge> at device 10.1 on pci0 cardbus1: <CardBus bus> on cbb1 pccard1: <16-bit PCCard bus> on cbb1 pci_cfgintr: 0:10 INTB routed to irq 11 pci0: <display, VGA> at device 18.0 (no driver attached) ohci0: <OPTi 82C861 (FireLink) USB controller> mem 0xfecff000-0xfecfffff irq 10 at device 19.0 on pci0 usb0: OHCI version 1.0, legacy support usb0: <OPTi 82C861 (FireLink) USB controller> on ohci0 usb0: USB revision 1.0 uhub0: OPTi OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 2 ports with 2 removable, self powered atapci0: <Generic PCI ATA controller> port 0xfcf0-0xfcff at device 20.0 on pci0 atapci0: Busmastering DMA not supported ata0: at 0x1f0 irq 14 on atapci0 ata1: at 0x170 irq 15 on atapci0 orm0: <Option ROM> at iomem 0xc0000-0xcbfff on isa0 pmtimer0 on isa0 fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> at port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on isa0 fdc0: FIFO enabled, 8 bytes threshold fd0: <1440-KB 3.5" drive> on fdc0 drive 0 atkbdc0: <Keyboard controller (i8042)> at port 0x64,0x60 on isa0 atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0 kbd0 at atkbd0 psm0: <PS/2 Mouse> irq 12 on atkbdc0 psm0: model Generic PS/2 mouse, device ID 0 vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 sio0: type 16550A sio1: configured irq 3 not in bitmap of probed irqs 0 sio1: port may not be enabled unknown: <PNP0303> can't assign resources (port) speaker0: <PC speaker> at port 0x61 on isa0 psmcpnp0: irq resource info is missing; assuming irq 12 unknown: <PNP0501> can't assign resources (port) unknown: <PNP0700> can't assign resources (port) Timecounters tick every 10.000 msec WARNING: apm_saver module requires apm enabled ipfw2 initialized, divert enabled, rule-based forwarding enabled, default to accept, logging limited to 100 packets/entry by default wi0: <WaveLAN/IEEE> at port 0x100-0x13f irq 11 function 0 config 1 on pccard0 wi0: 802.11 address: 00:90:d1:07:60:ee wi0: using RF:PRISM2 MAC:HFA3841 CARD:HWB3163 rev.A wi0: Intersil Firmware: Primary 0.03.00, Station 0.07.06 ad0: 19077MB <IBM-DJSA-220> [38760/16/63] at ata0-master BIOSPIO acd0: CDROM <TOSHIBA CD-ROM XM-1902B> at ata1-master BIOSPIO Mounting root from ufs:/dev/md0 <118>May 17 01:38:24 init: /etc/pwd.db: No such file or directory <118>Enter full pathname of shell or RETURN for /bin/sh: <118># <118> -------------- A diff of the two dmesg outputs: diff dmesg2 dmesg1 dmesg1=kernel that panics dmesg2=kernel that does not panic 4c4 < FreeBSD 5.0-RELEASE-p7 #1: Fri May 16 15:18:39 CEST 2003 --- > FreeBSD 5.0-RELEASE-p7 #2: Fri May 16 15:56:53 CEST 2003 6c6 < Preloaded elf kernel "/kernel" at 0xc0f86000. --- > Preloaded elf kernel "/kernel" at 0xc0e90000. 8c8 < Timecounter "TSC" frequency 360790606 Hz --- > Timecounter "TSC" frequency 360790865 Hz 14c14 < avail memory = 146579456 (139 MB) --- > avail memory = 147582976 (140 MB) 46a47 > pmtimer0 on isa0 48d48 < isa_dmainit(2, 1024) failed 68a69 > WARNING: apm_saver module requires apm enabled 77c78 < <118>May 17 01:37:02 init: /etc/pwd.db: No such file or directory --- > <118>May 17 01:38:24 init: /etc/pwd.db: No such file or directory 80,87c81 < Waiting (max 60 seconds) for system process `vnlru' to stop...stopped < Waiting (max 60 seconds) for system process `bufdaemon' to stop...stopped < Waiting (max 60 seconds) for system process `syncer' to stop...stopped < < syncing disks, buffers remaining... < done < Uptime: 34s < Rebooting... --- > <118> As you can see, in the kernel that panics, isa_dmainit gives an error. >How-To-Repeat: Build a kernel using the config using the following config file. Set the MD_ROOT_SIZE to 8000 or greater (build this using the picobsd build scripts). Bootup the new system and try to mount /dev/fd0 to a mount point on the MFS filesystem. Note: Make sure you replace the PICOBSD.hints file with the GENERIC.hints file! My current test kernel config file follows: # # $FreeBSD: src/release/picobsd/net/PICOBSD,v 1.14 2002/03/15 08:46:18 luigi Exp $ # #Line starting with #PicoBSD contains PicoBSD build parameters #marker def_sz init MFS_inodes floppy_inodes #PicoBSD 7000 init 4096 32768 options MD_ROOT_SIZE=7000 # same as def_sz hints "PICOBSD.hints" machine i386 #cpu I386_CPU cpu I486_CPU cpu I586_CPU cpu I686_CPU ident WarBSD maxusers 0 options INET #InterNETworking #options INET6 #options SOFTUPDATES #options UFS_DIRHASH #options UFS_ACL options MSDOSFS options MD_ROOT options SYSVSHM options SYSVMSG options SYSVSEM options _KPOSIX_PRIORITY_SCHEDULING options KBD_INSTALL_CDEV options FFS #Berkeley Fast Filesystem options NFSCLIENT #Network Filesystem options MD_ROOT #MFS as root options MSDOSFS #MSDOS Filesystem options NTFS options CD9660 #ISO 9660 Filesystem options PSEUDOFS options PROCFS options COMPAT_43 #Compatible with BSD 4.3 [KEEP THIS!] options COMPAT_FREEBSD4 #options COMPAT_OLDISA #Use ISA shims and glue for old drivers # Support for bridging and bandwidth limiting #options DUMMYNET #options BRIDGE #options INVARIANTS #options INVARIANT_SUPPORT #options WITNESS #options WITNESS_SKIPSPIN device isa device eisa device pci device mca device acpi device fdc #options FDC_DEBUG device ata device atadisk device atapicd device atapifd options ATA_STATIC_ID #Static device numbering # atkbdc0 controls both the keyboard and the PS/2 mouse device atkbdc device atkbd device psm device vga device splash device blank_saver device agp device apm device pmtimer # syscons is the default console driver, resembling an SCO console device sc device npx device sio device scbus device da device ppbus #device ppc device lpt #device plip #device ppi device uhci device ohci device usb device ugen #device uhid device ukbd #device ulpt device umass #device ums #device aue #device cue #device kue #PCCARD (PCMCIA) Support device cbb device pccard device cardbus #oldcard pcmcia bus #device card 2 #device pcic #Serial ports device sio # PCI Ethernet NICs. device de # DEC/Intel DC21x4x (``Tulip'') device em # Intel PRO/1000 adapter Gigabit Ethernet Card device txp # 3Com 3cR990 (``Typhoon'') device vx # 3Com 3c590, 3c595 (``Vortex'') # PCI Ethernet NICs that use the common MII bus controller code. # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs! device miibus # MII bus support device dc # DEC/Intel 21143 and various workalikes device fxp # Intel EtherExpress PRO/100B (82557, 82558) device pcn # AMD Am79C97x PCI 10/100 (precedence over 'lnc') device rl # RealTek 8129/8139 device sf # Adaptec AIC-6915 (``Starfire'') device sis # Silicon Integrated Systems SiS 900/SiS 7016 device ste # Sundance ST201 (D-Link DFE-550TX) device tl # Texas Instruments ThunderLAN device tx # SMC EtherPower II (83c170 ``EPIC'') device vr # VIA Rhine, Rhine II device wb # Winbond W89C840F device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'') device bge # Broadcom BCM570xx Gigabit Ethernet # ISA Ethernet NICs. pccard nics included. device cs # Crystal Semiconductor CS89x0 NIC # 'device ed' requires 'device miibus' device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards device ex # Intel EtherExpress Pro/10 and Pro/10+ #device ep # Etherlink III based cards device fe # Fujitsu MB8696x based cards device lnc # NE2100, NE32-VL Lance Ethernet cards device sn # SMC's 9000 series of ethernet chips device xe # Xircom pccard ethernet # ISA devices that use the old ISA shims #device le # Wireless NIC cards device an # Aironet 4500/4800 802.11 wireless NICs. device awi # BayStack 660 and others device wi # WaveLAN/Intersil/Symbol 802.11 wireless NICs. #device wl # Older non 802.11 Wavelan wireless NIC. device random device loop device ether device sl device tun #device vn device pty device md #device gzip # Exec gzipped a.out's device bpf device speaker #device gif #device faith options IPFIREWALL options IPFIREWALL_VERBOSE options IPFIREWALL_FORWARD options IPFIREWALL_VERBOSE_LIMIT=100 options IPFIREWALL_DEFAULT_TO_ACCEPT options IPDIVERT #options IPFILTER #options IPFILTER_LOG #options IPSTEALTH options RANDOM_IP_ID #options ACCEPT_FILTER_DATA options POWERFAIL_NMI device apm_saver >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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