crash on writing usbstick

[Brett Wynkoop]

Greeting-

So I plugged a 16G usb stick into my BeagleBone with the intent of
moving /usr/ports over to it.  During the process KABOOM!

swi_handler() at swi_handler+0x2e4
         pc = 0xc0613980  lr = 0xc06012a0 (swi_exit)
         sp = 0xd4889e50  fp = 0xbffff500
         r4 = 0x20c13200  r5 = 0x000001ed
         r6 = 0x20c13364  r7 = 0x00000088
         r8 = 0x00000001  r9 = 0xffffffe2
        r10 = 0x20c13200
swi_exit() at swi_exit
         pc = 0xc06012a0  lr = 0xc06012a0 (swi_exit)
         sp = 0xd4889e50  fp = 0xbffff500
mode = 02, inum = 1284268, fs = /export
panic: ffs_valloc: dup alloc
KDB: enter: panic
[ thread pid 700 tid 100090 ]
Stopped at      $d.7:   ldrb    r15, [r15, r15, ror r15]!
db> 


The command doing the writing was 

   tar xpvf - 

The entire pipeline was:

   tar cpvf - . |( cd /export/ports ; tar xpvf -)

The only difference from the stock kernel for the BB was that I built
in the GPT stuff.

More datapoints:

# fsck -p
/dev/mmcsd0s2a: FILE SYSTEM CLEAN; SKIPPING CHECKS
/dev/mmcsd0s2a: clean, 551793 free (3025 frags, 68596 blocks, 0.2%
fragmentation) /dev/gpt/bbexport: PARTIALLY TRUNCATED INODE I=1284121
/dev/gpt/bbexport: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
# 

[wynkoop at beaglebone ~]$ uname -a
FreeBSD beaglebone.wynn.com 11.0-CURRENT FreeBSD 11.0-CURRENT #2
r279219: Sun Mar  1 03:31:54 EST 2015
wynkoop at beaglebone.wynn.com:/usr/src/sys/arm/compile/BB-BEW  arm
[wynkoop at beaglebone ~]$ 


World and my kernel are in sync, and both built native on the BB.

How is it that some of you are actually able to use USB mass storage?

-Brett
-- 

wynkoop at wynn.com               http://prd4.wynn.com/wynkoop/pgp-keys.txt
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