Date: Fri, 10 Nov 2006 07:56:05 GMT From: Alexey<me@swizard.beercan.ru> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/105361: Kernel panic during unmounting mass storage (Creative mp3 player) Message-ID: <200611100756.kAA7u5xB052736@www.freebsd.org> Resent-Message-ID: <200611100800.kAA80gsj049427@freefall.freebsd.org>
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>Number: 105361
>Category: kern
>Synopsis: Kernel panic during unmounting mass storage (Creative mp3 player)
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Nov 10 08:00:41 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Alexey
>Release: FreeBSD 6.2 PRERELEASE
>Organization:
>Environment:
FreeBSD pstation.swizard.beercan.ru 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Wed Oct 25 01:10:14 MSD 2006 root@pstation.swizard.beercan.ru:/usr/obj/usr/src/sys/PSTATION62 i386
>Description:
Kernel panic and reboot if trying to unmount usb mass storage: Creative Rhomba mp3 flash player 256mb.
The vmcore backtrace shows corrupt stack:
pstation% sudo kgdb /boot/kernel/kernel vmcore.9
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
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This GDB was configured as "i386-marcel-freebsd".
(no debugging symbols found)...Attempt to extract a component of a value that is not a structure pointer.
(kgdb) bt
#0 0xc0657979 in doadump ()
#1 0xc065810e in boot ()
#2 0xc065858b in panic ()
#3 0xc08a75bf in trap_fatal ()
#4 0xc08a7171 in trap_pfault ()
#5 0xc08a6bf2 in trap ()
#6 0xc088b42a in calltrap ()
#7 0xc061a745 in devtoname ()
#8 0xc05f5e1b in msdosfs_print ()
#9 0xc08bee95 in VOP_PRINT_APV ()
#10 0xc06dd0dd in VOP_PRINT ()
#11 0xc06dd0af in vn_printf ()
#12 0xc06cd3f3 in vop_stdfsync ()
#13 0xc05f41b9 in msdosfs_fsync ()
#14 0xc08be60c in VOP_FSYNC_APV ()
#15 0xc05f23ba in VOP_FSYNC ()
#16 0xc05f2223 in msdosfs_sync ()
#17 0xc06d49c2 in dounmount ()
#18 0xc06d44fc in unmount ()
#19 0xc08a7abd in syscall ()
#20 0xc088b47f in Xint0x80_syscall ()
#21 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
>How-To-Repeat:
Attach player to usb and make sure it has been detected (dmesg)
# sudo mount_msdosfs -u <user> /dev/da4s1 /mnt
# cp -Rv <something> /mnt/
# sudo umount /mnt
^^^^^^ kernel panic here
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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