kern/118134: Geom/ATA: Panic when running `cdcontrol eject' on MacBook

Ed Schouten ed at
Mon Nov 19 11:40:02 PST 2007

>Number:         118134
>Category:       kern
>Synopsis:       Geom/ATA: Panic when running `cdcontrol eject' on MacBook
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov 19 19:40:01 UTC 2007
>Originator:     Ed Schouten
>Release:        FreeBSD 6.3-PRERELEASE i386
System: FreeBSD 8.0-CURRENT FreeBSD 8.0-CURRENT #1: Mon Nov 19 20:18:07 CET 2007 root at  amd64
I am one of the lucky owners of a brand new Apple MacBook, the ones that
were released by the end of October.

Because Apples don't have eject buttons on the CD-drive, I have to punch
in `cdcontrol eject' to remove a CD from the CD-ROM drive. For some
reason, this causes a panic, right after the drive spits out the CD.
$ cdcontrol eject

The following trace will pop up:

panic: Geom provider ACD::acd0 failed closing ->access()
cpuid = 0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
panic() at panic+0x17a
g_access() at g_access+0x2ff
g_dev_close() at g_dev_close+0xbf
devfs_close() at devfs_close+0x2dd
vn_close() at vn_close+0xb6
vn_closefile() at vn_closefile+0x82
fdrop() at fdrop+0xdd
closef() at closef+0x29
fdfree() at fdfree+0x10f
exit1() at exit1+0x2d5
sys_exit() at sys_exit+0xe
syscall() at syscall+0x1ba
Xfast_syscall() at Xfast_syscall+0xab
--- syscall (1, FreeBSD ELF64, sys_exit), rip = 0x80091e26c, rsp = 0x7fffffffeda8, rbp = 0x7fffffffee10 ---

Trace with kgdb:

#0  doadump () at pcpu.h:194
#1  0xffffffff8017f10c in db_fncall (dummy1=Variable "dummy1" is not available.
) at /usr/src/sys/ddb/db_command.c:486
#2  0xffffffff8017f62c in db_command_loop () at /usr/src/sys/ddb/db_command.c:401
#3  0xffffffff8018108f in db_trap (type=Variable "type" is not available.
) at /usr/src/sys/ddb/db_main.c:222
#4  0xffffffff802c8c95 in kdb_trap (type=3, code=0, tf=0xffffffffaf0b6520) at /usr/src/sys/kern/subr_kdb.c:502
#5  0xffffffff803f0e1a in trap (frame=0xffffffffaf0b6520) at /usr/src/sys/amd64/amd64/trap.c:472
#6  0xffffffff803d698e in calltrap () at /usr/src/sys/amd64/amd64/exception.S:169
#7  0xffffffff802c8e61 in kdb_enter (msg=0xffffffff80820fe0 "") at cpufunc.h:63
#8  0xffffffff802a1833 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:547
#9  0xffffffff8025211f in g_access (cp=0xffffffff80581800, dcr=-1, dcw=0, dce=53103872) at /usr/src/sys/geom/geom_subr.c:749
#10 0xffffffff8024b4ff in g_dev_close (dev=0xffffff0003321200, flags=Variable "flags" is not available.
) at /usr/src/sys/geom/geom_dev.c:217
#11 0xffffffff8023af2d in devfs_close (ap=0xffffffffaf0b6840) at /usr/src/sys/fs/devfs/devfs_vnops.c:369
#12 0xffffffff803241b6 in vn_close (vp=0xffffff00033b0000, flags=1, file_cred=0xffffff00010bad00, td=0xffffff0003393350) at vnode_if.h:228
#13 0xffffffff803242b2 in vn_closefile (fp=0xffffff00033a1168, td=0xffffff0003393350) at /usr/src/sys/kern/vfs_vnops.c:868
#14 0xffffffff8027727d in fdrop (fp=0xffffff00033a1168, td=0xffffff0003393350) at file.h:297
#15 0xffffffff802784b9 in closef (fp=0xffffff00033a1168, td=0xffffff0003393350) at /usr/src/sys/kern/kern_descrip.c:1958
#16 0xffffffff802791af in fdfree (td=0xffffff0003393350) at /usr/src/sys/kern/kern_descrip.c:1668
#17 0xffffffff80281f95 in exit1 (td=0xffffff0003393350, rv=0) at /usr/src/sys/kern/kern_exit.c:271
#18 0xffffffff80282dfe in sys_exit (td=Variable "td" is not available.
) at /usr/src/sys/kern/kern_exit.c:98
#19 0xffffffff803f075a in syscall (frame=0xffffffffaf0b6c70) at /usr/src/sys/amd64/amd64/trap.c:825
#20 0xffffffff803d6b9b in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:290
#21 0x000000080091e26c in ?? ()

Don't use the CD-ROM drive. :-(

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