kern/85893: [panic]

Russell Francis rfrancis at ev.net
Thu Sep 8 19:00:30 PDT 2005


>Number:         85893
>Category:       kern
>Synopsis:       [panic]
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Sep 09 02:00:25 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Russell Francis
>Release:        6.0-BETA4 i386
>Organization:
>Environment:
FreeBSD bigblue.columbus.rr.com 6.0-BETA4 FreeBSD 6.0-BETA4 #2: Sun Sep  4 22:35:56 EDT 2005     russ at bigblue.columbus.rr.com:/usr/obj/usr/src/sys/COWLICK  i386
>Description:
Repeatable kernel panic if you try to mount an audio CD.

This was the message on the screen when it crashed

panic: wrong offset 32768 for sectorsize 2352
KDB: enter: panic
[thread pid 827 tid 100089 ]
Stopped at         kbd_enter+0x2b:nop

--------------------------------------------------------------------
Below is a backtrace up to the system panic.  If anyone is interested I have a core dump and would be happy to provide more info.
----------------------------------------------------------------------
#24 0xc04fac5f in panic (fmt=0xc0658558 "wrong offset %jd for sectorsize %u")
    at /usr/src/sys/kern/kern_shutdown.c:537
#25 0xc04c728a in g_io_request (bp=0xc2a2f210, cp=0xc2a8e1c0)
    at /usr/src/sys/geom/geom_io.c:250
#26 0xc04c9ee9 in g_vfs_strategy (bo=0x0, bp=0xd637e300)
    at /usr/src/sys/geom/geom_vfs.c:106
#27 0xc053e0ef in breadn (vp=0xc2637990, blkno=64, size=2048, rablkno=0x0,
    rabsize=0x0, cnt=0, cred=0x0, bpp=0x0) at buf.h:415
#28 0xc053dff0 in bread (vp=0xc2637990, blkno=64, size=2048, cred=0x0,
    bpp=0xed0e7988) at /usr/src/sys/kern/vfs_bio.c:719
#29 0xc04d024b in iso_mountfs (devvp=0xc2637990, mp=0xc239a400, td=0xc23b3c80)
---Type <return> to continue, or q <return> to quit---
    at /usr/src/sys/isofs/cd9660/cd9660_vfsops.c:260
#30 0xc04cff58 in cd9660_mount (mp=0xc239a400, td=0xc23b3c80)
    at /usr/src/sys/isofs/cd9660/cd9660_vfsops.c:187
#31 0xc054982d in vfs_domount (td=0xc23b3c80,
    fstype=0xc0690f80 " \001f\031cd9660", fspath=0xc23d9750 "/cdrom",
    fsflags=1, fsdata=0xc23d4b90) at /usr/src/sys/kern/vfs_mount.c:739
#32 0xc0549102 in vfs_donmount (td=0xc23b3c80, fsflags=1, fsoptions=0xed0e7be8)
    at /usr/src/sys/kern/vfs_mount.c:503
#33 0xc054b209 in kernel_mount (ma=0xc23d9150, flags=1) at pcpu.h:162
#34 0xc04cfd89 in cd9660_cmount (ma=0xc23d9150, data=0xbfbfec30, flags=1,
    td=0xc23b3c80) at /usr/src/sys/isofs/cd9660/cd9660_vfsops.c:122
#35 0xc0549292 in mount (td=0xc23b3c80, uap=0xed0e7d04)
    at /usr/src/sys/kern/vfs_mount.c:566
#36 0xc0627b67 in syscall (frame=
      {tf_fs = 59, tf_es = 59, tf_ds = 59, tf_edi = -1077941200, tf_esi = -1077940705, tf_ebp = -1077941048, tf_isp = -317817500, tf_ebx = -1077940715, tf_edx = -1077940706, tf_ecx = 0, tf_eax = 21, tf_trapno = 12, tf_err = 2, tf_eip = 671852087, tf_cs = 51, tf_eflags = 582, tf_esp = -1077942276, tf_ss = 59})
    at /usr/src/sys/i386/i386/trap.c:986
#37 0xc061a80f in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:200
#38 0x0000003b in ?? ()
#39 0x0000003b in ?? ()
#40 0x0000003b in ?? ()
#41 0xbfbfec30 in ?? ()
#42 0xbfbfee1f in ?? ()
#43 0xbfbfecc8 in ?? ()
#44 0xed0e7d64 in ?? ()
#45 0xbfbfee15 in ?? ()
#46 0xbfbfee1e in ?? ()
#47 0x00000000 in ?? ()
#48 0x00000015 in ?? ()
#49 0x0000000c in ?? ()
#50 0x00000002 in ?? ()
#51 0x280ba637 in ?? ()
#52 0x00000033 in ?? ()
#53 0x00000246 in ?? ()
#54 0xbfbfe7fc in ?? ()
#55 0x0000003b in ?? ()
#56 0x00000000 in ?? ()
#57 0x00000000 in ?? ()
#58 0x00000000 in ?? ()
#59 0x00000000 in ?? ()
#60 0x3ea92000 in ?? ()
#61 0xc23b3dd4 in ?? ()
#62 0xc22887d0 in ?? ()
#63 0xed0e76f8 in ?? ()
#64 0xed0e76e0 in ?? ()
#65 0xc23b3c80 in ?? ()
#66 0xc050b03b in sched_switch (td=0xbfbfee15, newtd=0xbfbfee1f, flags=Cannot access memory at address 0xbfbfecd8
)
>How-To-Repeat:
1. Insert an audio CD into your drive
2. # mount /dev/acd0
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:


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