memtest did not reveal errors. unfortunately i got another panic, during some routine file operations.
(after the 2 previous panics, fsck required manual running, and even multiple runs, so maybe this one is choking on fsck's best efforts, i dont know.) savecore: reboot after panic: ffs_blkfree: bad size savecore: system went down at Sun Oct 26 12:26:47 2014 savecore: writing core to /var/crash/bsd.2.core savecore: writing kernel to /var/crash/bsd.2 # gdb (gdb) file /var/crash/bsd.2 Reading symbols from /var/crash/bsd.2...(no debugging symbols found)...done. (gdb) target kvm /var/crash/bsd.2.core #0 0xd0557603 in boot () (gdb) where #0 0xd0557603 in boot () #1 0xd03bbba6 in reboot () #2 0xd037cdd2 in db_boot_dump_cmd () #3 0xd037d4a4 in db_command () #4 0xd037d6ec in db_command_loop () #5 0xd03818da in db_trap () #6 0xd0553c1b in kdb_trap () #7 0xd05643b7 in trap () #8 0xd0200b31 in alltraps () #9 0xd0553937 in Debugger () #10 0xd03ca2c1 in panic () #11 0xd04c98d4 in ffs_blkfree () #12 0xd04d1249 in ffs_indirtrunc () #13 0xd04d26d9 in ffs_truncate () #14 0xd04e3bb3 in ufs_inactive () #15 0xd03f8814 in VOP_INACTIVE () #16 0xd03f14ce in vput () #17 0xd04e8f05 in ufs_remove () #18 0xd03f84a9 in VOP_REMOVE () #19 0xd03f5a14 in dounlinkat () #20 0xd03f5ada in sys_unlink () #21 0xd0563dd4 in syscall () #22 0xd0200bf3 in Xsyscall () #23 0xf5cf4fa8 in ?? () #24 0x0000005b in ?? () #25 0x00000063 in ?? () #26 0x00000033 in ?? () #27 0x00000033 in ?? () #28 0x814a2c80 in ?? () #29 0x841844f0 in ?? () #30 0xcfbd2248 in ?? () #31 0x37944cb4 in ?? () #32 0x37938aba in ?? () #33 0x00000028 in ?? () #34 0x0000000a in ?? () #35 0x00000003 in ?? () #36 0x00000002 in ?? () #37 0x08b08735 in ?? () #38 0x0000002b in ?? () #39 0x00200257 in ?? () #40 0xcfbd221c in ?? () #41 0x00000033 in ?? () #42 0x00000000 in ?? () -f -- go and catch a falling star...