Hi,

Lately, and seemingly inexplicably, firefox will lock up my X server with
it if I click a button where filesystem access is required eg. if I'm in
an 'upload file' form and a 'Browse...' button is available to go to a
filesystem browser. If I ssh into the machine remotely I can see that Xorg
is using 90+% CPU and the only way to recover is to reboot (which doesn't
even execute cleanly). Interestingly, I can reproduce this situation when
running firefox on a remote host but displaying locally so it seems more
likely X/system related than specifically firefox.  When the machine hangs,
even the keyboard is non functional eg scroll lock won't light. I have USB
keyboard/mouse.

I'd appreciate any tips for diagnosis/recovery. I've appended the most
relevant configuration information. I've already rebuilt and installed
kernel/world to ensure I'm up to date, and portupgraded as much as
practicable. I should note that I haven't changed my build options for
firefox since pre-crash, either.

regards,
-- Joel Hatton --
Infrastructure Manager              | Hotline: +61 7 3365 4417
AusCERT - Australia's national CERT | Fax:     +61 7 3365 7031
The University of Queensland        | WWW:     www.auscert.org.au
Qld 4072 Australia                  | Email:   [EMAIL PROTECTED]

Firefox options:

# This file is auto-generated by 'make config'.
# No user-servicable parts inside!
# Options for firefox-1.5.0.4,1
_OPTIONS_READ=firefox-1.5.0.4,1
WITH_NEWTAB=true
WITHOUT_SMB=true
WITHOUT_DEBUG=true
WITH_LOGGING=true
WITH_OPTIMIZED_CFLAGS=true

6.1-RELEASE-p1

Information for xorg-server-6.9.0_4:

Depends on:
Dependency: expat-2.0.0_1
Dependency: pkgconfig-0.20_2
Dependency: pkg-config-0.20_2
Dependency: libdrm-2.0.1_1
Dependency: freetype2-2.1.10_3
Dependency: fontconfig-2.3.2_5,1
Dependency: xorg-libraries-6.9.0

Information for firefox-1.5.0.4,1:

Depends on:
Dependency: libiconv-1.9.2_2
Dependency: expat-2.0.0_1
Dependency: gettext-0.14.5_2
Dependency: jpeg-6b_4
Dependency: pkgconfig-0.20_2
Dependency: pkg-config-0.20_2
Dependency: png-1.2.8_3
Dependency: freetype2-2.1.10_3
Dependency: popt-1.7_1
Dependency: perl-5.8.8
Dependency: glib-2.10.2
Dependency: nspr-4.6.1
Dependency: nss-3.11_1
Dependency: fontconfig-2.3.2_5,1
Dependency: libxml2-2.6.24
Dependency: libdrm-2.0.1_1
Dependency: xorg-libraries-6.9.0
Dependency: libXft-2.1.7_1
Dependency: tiff-3.8.2
Dependency: xorg-fonts-encodings-6.9.0_1
Dependency: shared-mime-info-0.17_1
Dependency: bitstream-vera-1.10_2
Dependency: libIDL-0.8.6_2
Dependency: atk-1.11.4
Dependency: xorg-fonts-truetype-6.9.0
Dependency: hicolor-icon-theme-0.5
Dependency: glitz-0.4.4_1
Dependency: desktop-file-utils-0.11
Dependency: cairo-1.0.4
Dependency: pango-1.12.2
Dependency: gtk-2.8.17

My current kernel config file:

machine         i386
cpu             I686_CPU
ident           GX260
options         SCHED_ULE               # ULE scheduler
options         PREEMPTION              # Enable kernel thread preemption
options         INET                    # InterNETworking
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         NFSCLIENT               # Network Filesystem Client
options         MSDOSFS                 # MSDOS Filesystem
options         CD9660                  # ISO 9660 Filesystem
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         COMPAT_FREEBSD5         # Compatible with FreeBSD5
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         ADAPTIVE_GIANT          # Giant mutex is adaptive.
options         IPFIREWALL              #firewall
options         IPFIREWALL_VERBOSE      #enable logging to syslogd(8)
options         INCLUDE_CONFIG_FILE     # Include this file in kernel
options         TCP_DROP_SYNFIN         #drop TCP packets with SYN+FIN
device          apic                    # I/O APIC
device          pci
device          fdc
device          ata
device          atadisk         # ATA disk drives
device          atapicd         # ATAPI CDROM drives
options         ATA_STATIC_ID   # Static device numbering
device          ahc             # AHA2940 and onboard AIC7xxx devices
device          isp             # Qlogic family
device          scbus           # SCSI bus (required for SCSI)
device          ch              # SCSI media changers
device          da              # Direct Access (disks)
device          sa              # Sequential Access (tape etc)
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
device          sc
device          agp             # support several AGP chipsets
device          pmtimer
device          sio             # 8250, 16[45]50 based serial ports
device          ppc
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          em              # Intel PRO/1000 adapter Gigabit Ethernet Card
device          loop            # Network loopback
device          random          # Entropy device
device          ether           # Ethernet support
device          pty             # Pseudo-ttys (telnet etc)
device          bpf             # Berkeley packet filter
device          uhci            # UHCI PCI->USB interface
device          usb             # USB Bus (required)
device          ugen            # Generic
device          uhid            # "Human Interface Devices"
device          ukbd            # Keyboard
device          umass           # Disks/Mass storage - Requires scbus and da
device          ums             # Mouse
options         NETSMBCRYPTO
options         LIBICONV
options         LIBMCHAIN
options         UNIONFS                 #Union filesystem
options         NULLFS                  #NULL filesystem

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