[DragonFlyBSD - Bug #2495] DFBSD v3.3.0.960.g553fe7 - ocnt != 0" failed in prop_object_release

["Antonio M. Huete Jimenez via Redmine" <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>]

Issue #2495 has been reported by tuxillo.

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Bug #2495: DFBSD v3.3.0.960.g553fe7 - ocnt != 0" failed in prop_object_release
http://bugs.dragonflybsd.org/issues/2495

Author: tuxillo
Status: New
Priority: High
Assignee: 
Category: 
Target version: 


Hi,

While trying to install recent master to a couple of striped disks using LVM, I get the following:

dm_target_stripe: Successfully initialized
dm_target_linear: Successfully initialized
disk scheduler: set policy of mapper/main-lv_swap to noop
disk scheduler: set policy of mapper/main-lv_root to noop
panic: assertion "ocnt != 0" failed in prop_object_release at /usr/src/sys/libprop/prop_object.c:1085


Backtrace:

#0  _get_mycpu () at ./machine/thread.h:69
#1  md_dumpsys (di=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:265
#2  0xffffffff804f3bb2 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:913
#3  0xffffffff802a77ac in db_fncall (dummy1=<optimized out>, dummy2=<optimized out>, dummy3=<optimized out>, dummy4=<optimized out>)
    at /usr/src/sys/ddb/db_command.c:539
#4  0xffffffff802a7c7f in db_command (aux_cmd_tablep_end=0xffffffff809e1bb8, aux_cmd_tablep=0xffffffff809e1b80,
    cmd_table=<optimized out>, last_cmdp=<optimized out>) at /usr/src/sys/ddb/db_command.c:401
#5  db_command_loop () at /usr/src/sys/ddb/db_command.c:467
#6  0xffffffff802aab41 in db_trap (type=<optimized out>, code=<optimized out>) at /usr/src/sys/ddb/db_trap.c:71
#7  0xffffffff808ac758 in kdb_trap (type=<optimized out>, code=<optimized out>, regs=<optimized out>)
    at /usr/src/sys/platform/pc64/x86_64/db_interface.c:174
#8  0xffffffff808b1a10 in trap_fatal (frame=0xffffffe0556cb2f8, eva=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/trap.c:1024
#9  0xffffffff808b2389 in trap (frame=0xffffffe0556cb2f8) at /usr/src/sys/platform/pc64/x86_64/trap.c:754
#10 0xffffffff8089c36f in calltrap () at /usr/src/sys/platform/pc64/x86_64/exception.S:188
#11 0xffffffff808ac549 in db_read_bytes (addr=282584257676679, size=8, data=0xffffffe0556cb3d8 "")
    at /usr/src/sys/platform/pc64/x86_64/db_interface.c:240
#12 0xffffffff802a70ad in db_get_value (addr=282584257676679, size=8, is_signed=0) at /usr/src/sys/ddb/db_access.c:58
#13 0xffffffff808ad1e5 in db_nextframe (ip=<optimized out>, fp=<optimized out>) at /usr/src/sys/platform/pc64/x86_64/db_trace.c:234
#14 db_stack_trace_cmd (addr=<optimized out>, have_addr=<optimized out>, count=<optimized out>, modif=<optimized out>)
    at /usr/src/sys/platform/pc64/x86_64/db_trace.c:440
#15 0xffffffff808ad3a7 in print_backtrace (count=1433187288) at /usr/src/sys/platform/pc64/x86_64/db_trace.c:452
#16 0xffffffff804f4498 in panic (fmt=0xffffffff808f6540 "assertion \"%s\" failed in %s at %s:%u")
    at /usr/src/sys/kern/kern_shutdown.c:812
#17 0xffffffff80766e47 in prop_object_release (obj=0xffffffe003410680) at /usr/src/sys/libprop/prop_object.c:1085
#18 0xffffffff804f9305 in udev_event_externalize (ev=<optimized out>) at /usr/src/sys/kern/kern_udev.c:496
#19 udev_dev_read (ap=<optimized out>) at /usr/src/sys/kern/kern_udev.c:745
#20 0xffffffff804d3aa7 in dev_dread (dev=0xffffffe03204ade0, uio=<optimized out>, ioflag=<optimized out>)
    at /usr/src/sys/kern/kern_device.c:192
#21 0xffffffff806d5017 in devfs_fo_read (fp=0xffffffe021529f58, uio=0xffffffe0556cb998, cred=<optimized out>, flags=<optimized out>)
    at /usr/src/sys/vfs/devfs/devfs_vnops.c:1176
#22 0xffffffff8052ab51 in fo_read (cred=<optimized out>, uio=<optimized out>, fp=<optimized out>, flags=<optimized out>)
    at /usr/src/sys/sys/file2.h:57
#23 dofileread (res=<optimized out>, flags=<optimized out>, auio=<optimized out>, fp=<optimized out>, fd=<optimized out>)
    at /usr/src/sys/kern/sys_generic.c:305
#24 kern_preadv (fd=3, auio=0xffffffe0556cb998, flags=0, res=<optimized out>) at /usr/src/sys/kern/sys_generic.c:269
#25 0xffffffff8052ad17 in sys_read (uap=0x0) at /usr/src/sys/kern/sys_generic.c:145
#26 0xffffffff808b2a2c in syscall2 (frame=0xffffffe0556cbab8) at /usr/src/sys/platform/pc64/x86_64/trap.c:1238
#27 0xffffffff8089c5bb in Xfast_syscall () at /usr/src/sys/platform/pc64/x86_64/exception.S:323
#28 0x000000000000002b in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Core dumps available at: leaf:~tuxillo/*_ocount.1

Cheers,
Antonio Huete



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