ports/140648: multimedia/vlc causes a panic if media files are on msdosfs

[Doug Barton]

>Number:         140648
>Category:       ports
>Synopsis:       multimedia/vlc causes a panic if media files are on msdosfs
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Nov 18 01:20:01 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Doug Barton
>Release:        FreeBSD 8.0-RC1 i386
>Organization:
AAAG
>Environment:
9-current as of r199418, vlc 1.0.3_1, with data on an msdosfs partition.
>Description:
When I try to access multimedia files on an msdosfs partition the kernel
panics. Accessing the same files on the command line, with another client
(mplayer), or from a UFS partition does not cause any problems. 

Panic is as follows:

(kgdb) #0  doadump () at pcpu.h:246
#1  0xc05f5a2f in boot (howto=260)
    at /usr/local/src/sys/kern/kern_shutdown.c:416
#2  0xc05f5d12 in panic (fmt=Variable "fmt" is not available.
) at /usr/local/src/sys/kern/kern_shutdown.c:579
#3  0xc05e61c7 in _mtx_assert (m=0xc0982cf0, what=4, 
    file=0xc08d1a5c "/usr/local/src/sys/kern/kern_mutex.c", line=223)
    at /usr/local/src/sys/kern/kern_mutex.c:708
#4  0xc05e6846 in _mtx_unlock_flags (m=0xc0982cf0, opts=0, 
    file=0xc08cdbf7 "/usr/local/src/sys/kern/kern_descrip.c", line=737)
    at /usr/local/src/sys/kern/kern_mutex.c:223
#5  0xc05c22f3 in kern_fcntl (td=0xc62ac000, fd=10, cmd=16, arg=131072)
    at /usr/local/src/sys/kern/kern_descrip.c:737
#6  0xc05c2691 in fcntl (td=0xc62ac000, uap=0xea5b3cf8)
    at /usr/local/src/sys/kern/kern_descrip.c:385
#7  0xc0863bc3 in syscall (frame=0xea5b3d38)
    at /usr/local/src/sys/i386/i386/trap.c:1078
#8  0xc0847110 in Xint0x80_syscall ()
    at /usr/local/src/sys/i386/i386/exception.s:261
#9  0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)


>How-To-Repeat:
See above.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: