From owner-freebsd-bugs@FreeBSD.ORG Wed Oct 11 16:40:30 2006 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7198216A403 for ; Wed, 11 Oct 2006 16:40:30 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7D17F43D73 for ; Wed, 11 Oct 2006 16:40:25 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id k9BGePhm081890 for ; Wed, 11 Oct 2006 16:40:25 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id k9BGePSe081889; Wed, 11 Oct 2006 16:40:25 GMT (envelope-from gnats) Date: Wed, 11 Oct 2006 16:40:25 GMT Message-Id: <200610111640.k9BGePSe081889@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: Herve Boulouis Cc: Subject: Re: kern/85780: 'panic: bogus refcnt 0' in routing/ipv6 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Herve Boulouis List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Oct 2006 16:40:30 -0000 The following reply was made to PR kern/85780; it has been noted by GNATS. From: Herve Boulouis To: bug-followup@FreeBSD.org Cc: Subject: Re: kern/85780: 'panic: bogus refcnt 0' in routing/ipv6 Date: Wed, 11 Oct 2006 18:33:00 +0200 I got the following panic on a i386 6.2-PRELEASE system : Machine was nearly idle at the time and has no ipv6 services (but a completely configured ipv6 stack) panic: bogus refcnt 0 Uptime: 1d14h3m32s Dumping 511 MB (2 chunks) chunk 0: 1MB (160 pages) ... ok chunk 1: 511MB (130800 pages) 495 479 463 447 431 415 399 383 367 351 335 319 303 287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15 backtrace : (kgdb) bt #0 0xc05e069c in doadump () #1 0xc05e0c12 in boot () #2 0xc05e0f4d in panic () #3 0xc067079c in rtfree () #4 0xc06b7247 in nd6_na_output () #5 0xc06b5f93 in nd6_ns_input () #6 0xc069a788 in icmp6_input () #7 0xc06a99bb in ip6_input () #8 0xc066c13e in netisr_processqueue () #9 0xc066c353 in swi_net () #10 0xc05c8e18 in ithread_execute_handlers () #11 0xc05c8f93 in ithread_loop () #12 0xc05c7b61 in fork_exit () kernel config : machine i386 cpu I686_CPU ident GENERIC-NERIM # To statically compile in device wiring instead of /boot/device.hints #hints "GENERIC.hints" # Default places to look for devices. options SCHED_4BSD # 4BSD scheduler options PREEMPTION # Enable kernel thread preemption options INET # InterNETworking options INET6 # IPv6 communications protocols options FFS # Berkeley Fast Filesystem options SOFTUPDATES # Enable FFS soft updates support options UFS_ACL # Support for access control lists options UFS_DIRHASH # Improve performance on big directories options UFS_EXTATTR options UFS_EXTATTR_AUTOSTART options MD_ROOT # MD is a potential root device options NFSCLIENT # Network Filesystem Client options NFSSERVER # Network Filesystem Server options NFS_ROOT # NFS usable as /, requires NFSCLIENT options MSDOSFS # MSDOS Filesystem options CD9660 # ISO 9660 Filesystem options UDF options PROCFS # Process filesystem (requires PSEUDOFS) options PSEUDOFS # Pseudo-filesystem framework options GEOM_GPT # GUID Partition Tables. options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!] options COMPAT_FREEBSD4 # Compatible with FreeBSD4 options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI options KTRACE # ktrace(1) support options SYSVSHM # SYSV-style shared memory options SYSVMSG # SYSV-style message queues options SYSVSEM # SYSV-style semaphores options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions options KBD_INSTALL_CDEV # install a CDEV entry in /dev options AHC_REG_PRETTY_PRINT # Print register bitfields in debug # output. Adds ~128k to driver. options AHD_REG_PRETTY_PRINT # Print register bitfields in debug # output. Adds ~215k to driver. options ADAPTIVE_GIANT # Giant mutex is adaptive. device apic # I/O APIC # Bus support. Do not remove isa, even if you have no isa slots device isa device eisa device pci # Floppy drives device fdc # ATA and ATAPI devices device ata device atadisk # ATA disk drives device ataraid # ATA RAID drives device atapicd # ATAPI CDROM drives device atapifd # ATAPI floppy drives options ATA_STATIC_ID # Static device numbering # SCSI Controllers device ahc # AHA2940 and onboard AIC7xxx devices device ahd # AHA39320/29320 and onboard AIC79xx devices device amd # AMD 53C974 (Tekram DC-390(T)) device isp # Qlogic family device sym # NCR/Symbios Logic (newer chipsets + those of `ncr') device trm # Tekram DC395U/UW/F DC315U adapters # SCSI peripherals device scbus # SCSI bus (required for SCSI) device da # Direct Access (disks) device sa # Sequential Access (tape etc) device cd # CD device pass # Passthrough device (direct SCSI access) device ses # SCSI Environmental Services (and SAF-TE) # RAID controllers interfaced to the SCSI subsystem device amr # AMI MegaRAID device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID device mly # Mylex AcceleRAID/eXtremeRAID # RAID controllers device aac # Adaptec FSA RAID device mpt # atkbdc0 controls both the keyboard and the PS/2 mouse device atkbdc # AT keyboard controller device atkbd # AT keyboard device psm # PS/2 mouse device vga # VGA video card driver device splash # Splash screen and screen saver support # syscons is the default console driver, resembling an SCO console device sc # Floating point support - do not disable. device npx # Add suspend/resume support for the i8254. device pmtimer # Serial (COM) ports device sio # 8250, 16[45]50 based serial ports # If you've got a "dumb" serial or parallel PCI card that is # supported by the puc(4) glue driver, uncomment the following # line to enable it (connects to the sio and/or ppc drivers): #device puc # PCI Ethernet NICs. device de # DEC/Intel DC21x4x (``Tulip'') device em # Intel PRO/1000 adapter Gigabit Ethernet Card device sk # some embedded 3com chipsets device bge # Broadcom BCM570x (``Tigon III'') # 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 rl # RealTek 8129/8139 device vr # VIA Rhine, Rhine II device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'') # Pseudo devices. device loop # Network loopback device mem # Memory and kernel memory devices device io # I/O device device random # Entropy device device ether # Ethernet support device ppp # Kernel PPP device tun # Packet tunnel. device pty # Pseudo-ttys (telnet etc) device md # Memory "disks" device gif # IPv6 and IPv4 tunneling device vlan #VLAN support (needs miibus) # The `bpf' device enables the Berkeley Packet Filter. # Be aware of the administrative consequences of enabling this! device bpf # Berkeley packet filter # SMB bus device smbus # Bus support, required for smb below. device intpm # Intel PIIX4 (82371AB, 82443MX) Power Management Unit device ichsmb # Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA) device smb # standard io through /dev/smb* # i2c bus device iicbus # Bus support, required for ic/iic/iicsmb below. device iicbb device ic # i2c network interface device iic # i2c standard io device iicsmb # smb over i2c bridge # firewall options IPFILTER options IPFILTER_LOG options ZERO_COPY_SOCKETS options NBUF=0 options INVARIANTS options INVARIANT_SUPPORT kernel & vmcore available on request. -- Herve Boulouis