Backtrace from crash tonight (after portsnap cron):

# kgdb kernel.debug /var/crash/vmcore.1
kgdb: kvm_nlist(_stopped_cpus):
kgdb: kvm_nlist(_stoppcbs):
[GDB will not be able to debug user-mode threads:
/usr/lib/ Unde fined symbol
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Unread portion of the kernel message buffer:
dev = ad4s1f, block = 26098960, fs = /usr
panic: ffs_blkfree: freeing free block
Uptime: 1d10h32m17s
Physical memory: 631 MB
Dumping 150 MB: 135 119 103 87 71 55 39 23 7

#0 doadump () at pcpu.h:195
195 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) backtrace
#0 doadump () at pcpu.h:195
#1 0xc06328a3 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2 0xc0632aa4 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3 0xc07d4d10 in ffs_blkfree (ump=0xc323ab00, fs=0xc321c800,
devvp=0xc328add0, bno=26098960, size=16384, inum=6500370)
at /usr/src/sys/ufs/ffs/ffs_alloc.c:1893
#4 0xc07e8588 in indir_trunc (freeblks=0xc3e12500, dbn=103954304, level=0,
lbn=12, countp=0xd9177c4c) at /usr/src/sys/ufs/ffs/ffs_softdep.c:2896
#5 0xc07e8850 in handle_workitem_freeblocks (freeblks=0xc3e12500, flags=0)
at /usr/src/sys/ufs/ffs/ffs_softdep.c:2746
#6 0xc07ea0d8 in process_worklist_item (mp=0xc324b7d4, flags=Variable
"flags" is not available.
at /usr/src/sys/ufs/ffs/ffs_softdep.c:963
#7 0xc07eb191 in softdep_process_worklist (mp=0xc324b7d4, full=0)
at /usr/src/sys/ufs/ffs/ffs_softdep.c:847
#8 0xc07ed70a in softdep_flush () at /usr/src/sys/ufs/ffs/ffs_softdep.c:758
#9 0xc06121d1 in fork_exit (callout=0xc07ed290 , arg=0x0,
frame=0xd9177d38) at /usr/src/sys/kern/kern_fork.c:796
#10 0xc0850170 in fork_trampoline () at

# uname -a
FreeBSD peanuts.homenet.local 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE
#121: Thu Oct 11 16:29:05 CEST 2007
rowi@peanuts.homenet.local:/usr/obj/usr/src/sys/PEANUTS i386

Sources from Builddate.


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